Exception Handling : Memory Leak???
Hi all
I have a problem in my system.It use radius-ldap for authentication and insert accounting to Oracle DB.In accounting table,I put a trigger with using an exception handling to update or insert some data to other tables in Oracle schema and ldap schema.When error occured,exception would be handled but when it completed,trigger didn't not release all of connections between Oracle DB,radius and ldap.Many many TCP connections were established but not destroyed and my system spent all memory for these connections.This may be caused by exception handling.
Does any body have a same problem?How can I solve this?
Sincerely Yours.
Does anybody know how to solve this problem?
Similar Messages
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Memory leak when exceptions are thrown?
Hello,
I'm doing a simple database connect with the JDBC Oracle 8.1.6 oci8 drivers on Solaris. It seems whenever I try to repeatedly connect to a database, and an exception is thrown, such as database not found, or wrong password, the program size grows and grows until it runs out of memory. I've narrowed it down to being the getConnection operation as the casue of this memory leak.
Now, if I repeatedly connect successfully, there is no problem, it will run all day, but if there are exceptions thrown, memory leaks. Has anyone else encountered this?
I'll paste a sample program below which shows the problem. Maybe someone can help???
import java.sql.*;
import java.util.*;
import java.io.*;
public class connect extends Thread {
private oracle.jdbc.driver.OracleDriver oDriver = new oracle.jdbc.driver.OracleDriver();
private Connection connection;
* Open a connection to the database
private void connectToDB() {
try {
connection = DriverManager.getConnection ("jdbc:oracle:oci8:@test", "test", "test");
connection.close();
} catch (SQLException e) {
e.printStackTrace();
System.out.println("couldn't connect");
public void run() {
try {
DriverManager.registerDriver(oDriver);
} catch (SQLException e) {}
while(true) {
try {
sleep(1000);
connectToDB();
} catch (InterruptedException ie) {}
public static void main(String[] args) {
connect conn = new connect();
conn.start();
nullTry this:
private void connectToDB() {
try {
connection = DriverManager.getConnection ("jdbc:oracle:oci8:@test", "test", "test");
} catch (SQLException e) {
e.printStackTrace();
System.out.println("couldn't connect");
finally {
connection.close();
null -
Memory leak in Servlet Filter handling?
In Sun Web Server 6.1, I'm finding a memory leak when using servlet filters. I've even created a "no op" servlet filter. When it's registered, every 10000 hits or so to filtered static content will eat up about 5 to 10 MB of RAM. The JVM heap size doesn't increase.
When I remove the filter, I've hit the same static page on the server 50000 times without seeing an increase in memory usage by the process.
This is on Windows 2000, and I think the Sun Web Server 6.1 is SP1. I haven't tried SP2 yet.
For reference, here's the filter I put in:
public class NoOpFilter implements Filter
public void init(FilterConfig arg0) throws ServletException {}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
chain.doFilter(request, response);
public void destroy() {}
}I found the bug. I get the memory leak if magnus.conf has either or both of the following entries:
AdminLanguage en
DefaultLanguage en
If I delete the entries, the memory leak goes away. I suppose this should get fixed by Sun sometime. Maybe I'll figure out how to officially report the bug later. -
Pro*c multithreaded application has memory leak
Hi there,
I posted this message a week ago in OCI section, nobody answer me.
I am really curious if my application has a bug or the pro*c has a bug.
Anyone can compile the sample code and test it easily.
I made multithreaded application which queries dynamic SQL, it works.
But the memory leaks when i query the SQL statement.
The more memory leaks, the more i query the SQL statement, even same SQL
statement.
I check it with top, shell command.
My machine is SUN E450, Solaris 8. Oracle 9.2.0.1
Compiler : gcc (GCC) 3.2.2
I changed source code which is from
$(ORACLE_HOME)/precomp/demo/proc/sample10.pc
the sample10 doesn't need to be multithreaded. But i think it has to work
correctly if i changed it to multithreaded application.
the make file and source code will be placed below.
I have to figure out the problem.
Please help
Thanks in advance,
the make file is below
HOME = /user/jkku
ORA = $(ORACLE_HOME)
CC = gcc
PROC = proc
LC_INCL = -I$(HOME)/work/dbmss/libs/include
lc_incl = include=$(HOME)/work/dbmss/libs/include
SYS_INCL =
sys_incl =
ORA_INCL = -I. \
-I$(ORA)/precomp/public \
-I$(ORA)/rdbms/public \
-I$(ORA)/rdbms/demo \
-I$(ORA)/rdbms/pbsql/public \
-I$(ORA)/network/public \
-DSLMXMX_ENABLE -DSLTS_ENABLE -D_SVID_GETTOD
INCLUDES = $(LC_INCL) $(SYS_INCL) $(ORA_INCL)
includes = $(lc_incl) $(sys_incl)
LC_LIBS =
SYS_LIBS = -lpthread -lsocket -lnsl -lrt
ORA_LIBS = -L$(ORA)/lib/ -lclntsh
LIBS = $(LC_LIBS) $(SYS_LIBS) $(ORA_LIBS)
# Define C Compiler flags
CFLAGS += -D_Solaris64_ -m64
CFLAGS += -g -D_REENTRANT
# Define pro*c Compiler flags
PROCFLAGS += THREADS=YES
PROCFLAGS += CPOOL=YES
# Our object files
PRECOMPS = sample10.c
OBJS = sample10.o
.SUFFIXES: .o .c .pc
.c.o:
$(CC) -c $(CFLAGS) $(INCLUDES) $*.c
.pc.c:
$(PROC) $(PROCFLAGS) $(includes) $*.pc $*.c
all: sample10
sample10: $(PRECOMPS) $(OBJS)
$(CC) $(CFLAGS) -o sample10 $(OBJS) $(LIBS)
clean:
rm -rf *.o sample10 sample10.c
the source code is below which i changed the oracle sample10.pc to
multithreaded application.
Sample Program 10: Dynamic SQL Method 4
This program connects you to ORACLE using your username and
password, then prompts you for a SQL statement. You can enter
any legal SQL statement. Use regular SQL syntax, not embedded SQL.
Your statement will be processed. If it is a query, the rows
fetched are displayed.
You can enter multi-line statements. The limit is 1023 characters.
This sample program only processes up to MAX_ITEMS bind variables and
MAX_ITEMS select-list items. MAX_ITEMS is #defined to be 40.
#include <stdio.h>
#include <string.h>
#include <setjmp.h>
#include <sqlda.h>
#include <stdlib.h>
#include <sqlcpr.h>
/* Maximum number of select-list items or bind variables. */
#define MAX_ITEMS 40
/* Maximum lengths of the names of the
select-list items or indicator variables. */
#define MAX_VNAME_LEN 30
#define MAX_INAME_LEN 30
#ifndef NULL
#define NULL 0
#endif
/* Prototypes */
#if defined(__STDC__)
void sql_error(void);
int oracle_connect(void);
int alloc_descriptors(int, int, int);
int get_dyn_statement(void);
void set_bind_variables(void);
void process_select_list(void);
void help(void);
#else
void sql_error(/*_ void _*/);
int oracle_connect(/*_ void _*/);
int alloc_descriptors(/*_ int, int, int _*/);
int get_dyn_statement(/* void _*/);
void set_bind_variables(/*_ void -*/);
void process_select_list(/*_ void _*/);
void help(/*_ void _*/);
#endif
char *dml_commands[] = {"SELECT", "select", "INSERT", "insert",
"UPDATE", "update", "DELETE", "delete"};
EXEC SQL INCLUDE sqlda;
EXEC SQL INCLUDE sqlca;
EXEC SQL BEGIN DECLARE SECTION;
char dyn_statement[1024];
EXEC SQL VAR dyn_statement IS STRING(1024);
EXEC SQL END DECLARE SECTION;
EXEC ORACLE OPTION (ORACA=YES);
EXEC ORACLE OPTION (RELEASE_CURSOR=YES);
SQLDA *bind_dp;
SQLDA *select_dp;
/* Define a buffer to hold longjmp state info. */
jmp_buf jmp_continue;
char *db_uid="dbmuser/dbmuser@dbmdb";
sql_context ctx;
int err_sql;
enum{
SQL_SUCC=0,
SQL_ERR,
SQL_NOTFOUND,
SQL_UNIQUE,
SQL_DISCONNECT,
SQL_NOTNULL
int main()
int i;
EXEC SQL ENABLE THREADS;
EXEC SQL WHENEVER SQLERROR DO sql_error();
EXEC SQL WHENEVER NOT FOUND DO sql_not_found();
/* Connect to the database. */
if (connect_database() < 0)
exit(1);
EXEC SQL CONTEXT USE :ctx;
/* Process SQL statements. */
for (;;)
/* Allocate memory for the select and bind descriptors. */
if (alloc_descriptors(MAX_ITEMS, MAX_VNAME_LEN, NAME_LEN) != 0)
exit(1);
(void) setjmp(jmp_continue);
/* Get the statement. Break on "exit". */
if (get_dyn_statement() != 0)
break;
EXEC SQL PREPARE S FROM :dyn_statement;
EXEC SQL DECLARE C CURSOR FOR S;
/* Set the bind variables for any placeholders in the
SQL statement. */
set_bind_variables();
/* Open the cursor and execute the statement.
* If the statement is not a query (SELECT), the
* statement processing is completed after the
* OPEN.
EXEC SQL OPEN C USING DESCRIPTOR bind_dp;
/* Call the function that processes the select-list.
* If the statement is not a query, this function
* just returns, doing nothing.
process_select_list();
/* Tell user how many rows processed. */
for (i = 0; i < 8; i++)
if (strncmp(dyn_statement, dml_commands, 6) == 0)
printf("\n\n%d row%c processed.\n", sqlca.sqlerrd[2], sqlca.sqlerrd[2] == 1 ? '\0' : 's');
break;
/* Close the cursor. */
EXEC SQL CLOSE C;
/* When done, free the memory allocated for pointers in the bind and
select descriptors. */
for (i = 0; i < MAX_ITEMS; i++)
if (bind_dp->V != (char *) 0)
free(bind_dp->V);
free(bind_dp->I); /* MAX_ITEMS were allocated. */
if (select_dp->V != (char *) 0)
free(select_dp->V);
free(select_dp->I); /* MAX_ITEMS were allocated. */
/* Free space used by the descriptors themselves. */
SQLSQLDAFree(ctx, bind_dp);
SQLSQLDAFree(ctx, select_dp);
} /* end of for(;;) statement-processing loop */
disconnect_database();
EXEC SQL WHENEVER SQLERROR CONTINUE;
EXEC SQL COMMIT WORK RELEASE;
puts("\nHave a good day!\n");
return;
* Allocate the BIND and SELECT descriptors using sqlald().
* Also allocate the pointers to indicator variables
* in each descriptor. The pointers to the actual bind
* variables and the select-list items are realloc'ed in
* the set_bind_variables() or process_select_list()
* routines. This routine allocates 1 byte for select_dp->V
* and bind_dp->V, so the realloc will work correctly.
alloc_descriptors(size, max_vname_len, max_iname_len)
int size;
int max_vname_len;
int max_iname_len;
int i;
* The first sqlald parameter determines the maximum number of
* array elements in each variable in the descriptor. In
* other words, it determines the maximum number of bind
* variables or select-list items in the SQL statement.
* The second parameter determines the maximum length of
* strings used to hold the names of select-list items
* or placeholders. The maximum length of column
* names in ORACLE is 30, but you can allocate more or less
* as needed.
* The third parameter determines the maximum length of
* strings used to hold the names of any indicator
* variables. To follow ORACLE standards, the maximum
* length of these should be 30. But, you can allocate
* more or less as needed.
if ((bind_dp =
SQLSQLDAAlloc(ctx, size, max_vname_len, max_iname_len)) ==
(SQLDA *) 0)
fprintf(stderr,
"Cannot allocate memory for bind descriptor.");
return -1; /* Have to exit in this case. */
if ((select_dp =
SQLSQLDAAlloc(ctx, size, max_vname_len, max_iname_len)) == (SQLDA *)
0)
fprintf(stderr,
"Cannot allocate memory for select descriptor.");
return -1;
select_dp->N = MAX_ITEMS;
/* Allocate the pointers to the indicator variables, and the
actual data. */
for (i = 0; i < MAX_ITEMS; i++) {
bind_dp->I = (short *) malloc(sizeof (short));
select_dp->I = (short *) malloc(sizeof(short));
bind_dp->V = (char *) malloc(1);
select_dp->V = (char *) malloc(1);
return 0;
int get_dyn_statement()
char *cp, linebuf[256];
int iter, plsql;
for (plsql = 0, iter = 1; ;)
if (iter == 1)
printf("\nSQL> ");
dyn_statement[0] = '\0';
fgets(linebuf, sizeof linebuf, stdin);
cp = strrchr(linebuf, '\n');
if (cp && cp != linebuf)
*cp = ' ';
else if (cp == linebuf)
continue;
if ((strncmp(linebuf, "EXIT", 4) == 0) ||
(strncmp(linebuf, "exit", 4) == 0))
return -1;
else if (linebuf[0] == '?' ||
(strncmp(linebuf, "HELP", 4) == 0) ||
(strncmp(linebuf, "help", 4) == 0))
help();
iter = 1;
continue;
if (strstr(linebuf, "BEGIN") ||
(strstr(linebuf, "begin")))
plsql = 1;
strcat(dyn_statement, linebuf);
if ((plsql && (cp = strrchr(dyn_statement, '/'))) ||
(!plsql && (cp = strrchr(dyn_statement, ';'))))
*cp = '\0';
break;
else
iter++;
printf("%3d ", iter);
return 0;
void set_bind_variables()
int i, n;
char bind_var[64];
/* Describe any bind variables (input host variables) */
EXEC SQL WHENEVER SQLERROR DO sql_error();
bind_dp->N = MAX_ITEMS; /* Initialize count of array elements. */
EXEC SQL DESCRIBE BIND VARIABLES FOR S INTO bind_dp;
/* If F is negative, there were more bind variables
than originally allocated by sqlald(). */
if (bind_dp->F < 0)
printf ("\nToo many bind variables (%d), maximum is %d\n.",
-bind_dp->F, MAX_ITEMS);
return;
/* Set the maximum number of array elements in the
descriptor to the number found. */
bind_dp->N = bind_dp->F;
/* Get the value of each bind variable as a
* character string.
* C contains the length of the bind variable
* name used in the SQL statement.
* S contains the actual name of the bind variable
* used in the SQL statement.
* L will contain the length of the data value
* entered.
* V will contain the address of the data value
* entered.
* T is always set to 1 because in this sample program
* data values for all bind variables are entered
* as character strings.
* ORACLE converts to the table value from CHAR.
* I will point to the indicator value, which is
* set to -1 when the bind variable value is "null".
for (i = 0; i < bind_dp->F; i++)
printf ("\nEnter value for bind variable %.*s: ",
(int)bind_dp->C, bind_dp->S);
fgets(bind_var, sizeof bind_var, stdin);
/* Get length and remove the new line character. */
n = strlen(bind_var) - 1;
/* Set it in the descriptor. */
bind_dp->L = n;
/* (re-)allocate the buffer for the value.
sqlald() reserves a pointer location for
V but does not allocate the full space for
the pointer. */
bind_dp->V = (char *) realloc(bind_dp->V, (bind_dp->L + 1));
/* And copy it in. */
strncpy(bind_dp->V, bind_var, n);
/* Set the indicator variable's value. */
if ((strncmp(bind_dp->V, "NULL", 4) == 0) ||
(strncmp(bind_dp->V, "null", 4) == 0))
*bind_dp->I = -1;
else
*bind_dp->I = 0;
/* Set the bind datatype to 1 for CHAR. */
bind_dp->T = 1;
return;
void process_select_list()
int i, null_ok, precision, scale;
if ((strncmp(dyn_statement, "SELECT", 6) != 0) &&
(strncmp(dyn_statement, "select", 6) != 0))
select_dp->F = 0;
return;
/* If the SQL statement is a SELECT, describe the
select-list items. The DESCRIBE function returns
their names, datatypes, lengths (including precision
and scale), and NULL/NOT NULL statuses. */
select_dp->N = MAX_ITEMS;
EXEC SQL DESCRIBE SELECT LIST FOR S INTO select_dp;
/* If F is negative, there were more select-list
items than originally allocated by sqlald(). */
if (select_dp->F < 0)
printf ("\nToo many select-list items (%d), maximum is %d\n",
-(select_dp->F), MAX_ITEMS);
return;
/* Set the maximum number of array elements in the
descriptor to the number found. */
select_dp->N = select_dp->F;
/* Allocate storage for each select-list item.
sqlprc() is used to extract precision and scale
from the length (select_dp->L).
sqlnul() is used to reset the high-order bit of
the datatype and to check whether the column
is NOT NULL.
CHAR datatypes have length, but zero precision and
scale. The length is defined at CREATE time.
NUMBER datatypes have precision and scale only if
defined at CREATE time. If the column
definition was just NUMBER, the precision
and scale are zero, and you must allocate
the required maximum length.
DATE datatypes return a length of 7 if the default
format is used. This should be increased to
9 to store the actual date character string.
If you use the TO_CHAR function, the maximum
length could be 75, but will probably be less
(you can see the effects of this in SQL*Plus).
ROWID datatype always returns a fixed length of 18 if
coerced to CHAR.
LONG and
LONG RAW datatypes return a length of 0 (zero),
so you need to set a maximum. In this example,
it is 240 characters.
printf ("\n");
for (i = 0; i < select_dp->F; i++)
char title[MAX_VNAME_LEN];
/* Turn off high-order bit of datatype (in this example,
it does not matter if the column is NOT NULL). */
sqlnul ((unsigned short *)&(select_dp->T), (unsigned short
*)&(select_dp->T), &null_ok);
switch (select_dp->T)
case 1 : /* CHAR datatype: no change in length
needed, except possibly for TO_CHAR
conversions (not handled here). */
break;
case 2 : /* NUMBER datatype: use sqlprc() to
extract precision and scale. */
sqlprc ((unsigned int *)&(select_dp->L), &precision,
&scale);
/* Allow for maximum size of NUMBER. */
if (precision == 0) precision = 40;
/* Also allow for decimal point and
possible sign. */
/* convert NUMBER datatype to FLOAT if scale > 0,
INT otherwise. */
if (scale > 0)
select_dp->L = sizeof(float);
else
select_dp->L = sizeof(int);
break;
case 8 : /* LONG datatype */
select_dp->L = 240;
break;
case 11 : /* ROWID datatype */
case 104 : /* Universal ROWID datatype */
select_dp->L = 18;
break;
case 12 : /* DATE datatype */
select_dp->L = 9;
break;
case 23 : /* RAW datatype */
break;
case 24 : /* LONG RAW datatype */
select_dp->L = 240;
break;
/* Allocate space for the select-list data values.
sqlald() reserves a pointer location for
V but does not allocate the full space for
the pointer. */
if (select_dp->T != 2)
select_dp->V = (char *) realloc(select_dp->V,
select_dp->L + 1);
else
select_dp->V = (char *) realloc(select_dp->V,
select_dp->L);
/* Print column headings, right-justifying number
column headings. */
/* Copy to temporary buffer in case name is null-terminated */
memset(title, ' ', MAX_VNAME_LEN);
strncpy(title, select_dp->S, select_dp->C);
if (select_dp->T == 2)
if (scale > 0)
printf ("%.*s ", select_dp->L+3, title);
else
printf ("%.*s ", select_dp->L, title);
else
printf("%-.*s ", select_dp->L, title);
/* Coerce ALL datatypes except for LONG RAW and NUMBER to
character. */
if (select_dp->T != 24 && select_dp->T != 2)
select_dp->T = 1;
/* Coerce the datatypes of NUMBERs to float or int depending on
the scale. */
if (select_dp->T == 2)
if (scale > 0)
select_dp->T = 4; /* float */
else
select_dp->T = 3; /* int */
printf ("\n\n");
/* FETCH each row selected and print the column values. */
EXEC SQL WHENEVER NOT FOUND GOTO end_select_loop;
for (;;)
EXEC SQL FETCH C USING DESCRIPTOR select_dp;
/* Since each variable returned has been coerced to a
character string, int, or float very little processing
is required here. This routine just prints out the
values on the terminal. */
for (i = 0; i < select_dp->F; i++)
if (*select_dp->I < 0)
if (select_dp->T == 4)
printf ("%-*c ",(int)select_dp->L+3, ' ');
else
printf ("%-*c ",(int)select_dp->L, ' ');
else
if (select_dp->T == 3) /* int datatype */
printf ("%*d ", (int)select_dp->L,
*(int *)select_dp->V);
else if (select_dp->T == 4) /* float datatype */
printf ("%*.2f ", (int)select_dp->L,
*(float *)select_dp->V);
else /* character string */
printf ("%-*.*s ", (int)select_dp->L,
(int)select_dp->L, select_dp->V);
printf ("\n");
end_select_loop:
return;
void help()
puts("\n\nEnter a SQL statement or a PL/SQL block at the SQL> prompt.");
puts("Statements can be continued over several lines, except");
puts("within string literals.");
puts("Terminate a SQL statement with a semicolon.");
puts("Terminate a PL/SQL block (which can contain embedded
semicolons)");
puts("with a slash (/).");
puts("Typing \"exit\" (no semicolon needed) exits the program.");
puts("You typed \"?\" or \"help\" to get this message.\n\n");
int connect_database()
err_sql = SQL_SUCC;
EXEC SQL WHENEVER SQLERROR DO sql_error();
EXEC SQL WHENEVER NOT FOUND DO sql_not_found();
EXEC SQL CONTEXT ALLOCATE :ctx;
EXEC SQL CONTEXT USE :ctx;
EXEC SQL CONNECT :db_uid;
if(err_sql != SQL_SUCC){
printf("err => connect database(ctx:%ld, uid:%s) failed!\n", ctx, db_uid);
return -1;
return 1;
int disconnect_database()
err_sql = SQL_SUCC;
EXEC SQL WHENEVER SQLERROR DO sql_error();
EXEC SQL WHENEVER NOT FOUND DO sql_not_found();
EXEC SQL CONTEXT USE :ctx;
EXEC SQL COMMIT WORK RELEASE;
EXEC SQL CONTEXT FREE:ctx;
return 1;
void sql_error()
printf("err => %.*s", sqlca.sqlerrm.sqlerrml, sqlca.sqlerrm.sqlerrmc);
printf("in \"%.*s...\'\n", oraca.orastxt.orastxtl, oraca.orastxt.orastxtc);
printf("on line %d of %.*s.\n\n", oraca.oraslnr, oraca.orasfnm.orasfnml,
oraca.orasfnm.orasfnmc);
switch(sqlca.sqlcode) {
case -1: /* unique constraint violated */
err_sql = SQL_UNIQUE;
break;
case -1012: /* not logged on */
case -1089:
case -3133:
case -1041:
case -3114:
case -3113:
/* �6�Ŭ�� shutdown�ǰų� �α��� ���°� �ƴҶ� ��b�� �õ� */
/* immediate shutdown in progress - no operations are permitted */
/* end-of-file on communication channel */
/* internal error. hostdef extension doesn't exist */
err_sql = SQL_DISCONNECT;
break;
case -1400:
err_sql = SQL_NOTNULL;
break;
default:
err_sql = SQL_ERR;
break;
EXEC SQL CONTEXT USE :ctx;
EXEC SQL WHENEVER SQLERROR CONTINUE;
EXEC SQL ROLLBACK WORK;
void sql_not_found()
err_sql = SQL_NOTFOUND;Hi Jane,
What version of Berkeley DB XML are you using?
What is your operating system and your hardware platform?
For how long have been the application running?
What is your current container size?
What's set for EnvironmentConfig.setThreaded?
Do you know if containers have previously not been closed correctly?
Can you please post the entire error output?
What's the JDK version, 1.4 or 1.5?
Thanks,
Bogdan -
Memory Leak issue with TreeView
Hi,
I get Memory Leaks in the TreeView, if I open the stage which contains the TreeView several times.
Everytime I open the stage, I clear the TreeView and populate it with new items.
However there are leaks.
I think this is a bug. But maybe my code is wrong and someone could comment on this issue.
See this test case:
i < 10: 5854 KB
i < 100: 35944 KB
i < 200: 64515 KB
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeView;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
public class TestApp3 extends Application {
public static void main(String[] args) throws Exception {
launch(args);
public void start(final Stage stage) throws Exception {
VBox root = new VBox();
SubStage subStage = new SubStage();
for (int i = 0; i < 10; i++) {
subStage.show();
subStage.hide();
System.gc();
System.out.println((Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / 1024 + " KB");
Scene scene = new Scene(root);
stage.setScene(scene);
stage.show();
private class SubStage extends Stage {
public SubStage() {
TreeView<String> treeView = new TreeView<String>();
final TreeItem<String> rootNode = new TreeItem<String>("Root");
treeView.setRoot(rootNode);
setOnShowing(new EventHandler<WindowEvent>() {
@Override
public void handle(WindowEvent windowEvent) {
rootNode.getChildren().clear();
rootNode.getChildren().add(new TreeItem<String>("Item"));
Scene scene = new Scene(treeView);
setScene(scene);
}Edited by: csh on 07.09.2012 06:14
Edited by: csh on 07.09.2012 06:14Hi. If You replace
rootNode.getChildren().clear();
rootNode.getChildren().add(new TreeItem<String>("Item"));
with:
rootNode.getChildren().setAll( new TreeItem<String>("Item"));
You will get the following:
i < 10: 2881 KB
i < 100: 3341 KB
I <200: 3478 KB -
Hi All,
I had posted this query to couple of other groups ..I am still struglling with this issue..Hope someone will help me out here
I have very basic application which uses DataSerives over RTMP channel to populate dataGrid , I have not used any user defined component.
This application has got LOAD data and Remove data Button just to simulate the actual application
What happens , when I click on LOAD data , It loads the data from server(JBOSS) then I Remove all the data and force the GC to run
If I continuously keep loading and removing the data , memory goes up every time and after some times It reaches to threshold and finally crashes the Browser.
In actual application as soon as user logs in a dedicated DS destination is created..
private function createDestination(destName:String):void{
var remoteService:RemoteObject = new RemoteObject("DestinationManager");
remoteService.addEventListener(ResultEvent.RESULT, resultHandler,false,0,true);
var operation:AbstractOperation = remoteService.getOperation("createDestination");
operation.send(destName);
var cs:ChannelSet = new ChannelSet();
var rtmpChannel:RTMPChannel = ServerConfig.getChannel("my-rtmp") as RTMPChannel;
cs.addChannel(rtmpChannel);
tradeService = new DataService() ;
tradeService.destination=destName;
tradeService.channelSet = cs;
Now when user hits on Load data button to load the trade data ...
public function loadData():void
var remoteService:RemoteObject = new RemoteObject("filterRemoteVO");
var operation:AbstractOperation = remoteService.getOperation("loadData");
tradeService.fill(tradeCollection);
operation.send(rowData.text ,GUIID);
tradeList.dataProvider = tradeCollection;
Remove Data hit I clean all the resource and released collection :-
public function removeAll():void{
if(tradeList.dataProvider){
tradeCollection.source = new Array();
tradeList.dataProvider.source = new Array();
tradeList.dataProvider = null;
tradeService.release();
tradeService.releaseCollection(tradeCollection);
tradeService.channelSet.disconnectAll();
tradeService.disconnect();
tradeService.logout();
System.gc();
Except these 3 function I don't have any code which could cause memory leak.
I m using
LCDS 2.5
Flex 3.0
JBoss4.2
Please see the mxml file below , If possible please have a look at it , I might not be using dataSerice API correctly.
I have been trying to solve this leak for last two week , I really need help from you guys.
My client has already evaluating other contemporary technology because of this memory issue.
I have also created scalled down war file which can be deployed on any java application server.
Any help will greatly be appreciated
Regards,
Dam
######################## MXML##########################
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
creationComplete="init();" height="100%" width="100%"
>
<mx:Script >
<![CDATA[
import mx.containers.GridRow;
import mx.utils.Base64Decoder;
import mx.utils.StringUtil;
import mx.events.CollectionEvent;
import mx.formatters.Formatter;
import mx.events.ResizeEvent;
import mx.controls.DataGrid;
import mx.effects.Fade;
import mx.events.DataGridEvent;
import mx.utils.ObjectUtil;
import mx.events.ScrollEvent;
import mx.formatters.DateFormatter;
import mx.events.ListEvent;
import mx.data.mxml.DataService;
import mx.messaging.config.ServerConfig;
import mx.messaging.channels.RTMPChannel;
import mx.messaging.ChannelSet;
import mx.rpc.AbstractOperation;
import mx.rpc.remoting.RemoteObject;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.rpc.events.ResultEvent;
import mx.messaging.messages.*;
import mx.messaging.events.*;
import mx.controls.Alert;
private var GUIID:String;
private var lastRollOverIndex:Number;
public var tradeService:DataService=null;
public var tradeCollection:ArrayCollection = new ArrayCollection();
public var flag:Boolean = false;
private function init():void {
var guiId:String ="TEST";
createDestination(GUIID);
public function getData():void{
// memory.text =""+ ((System.totalMemory / 1024)/1024);
public function releaseDataServices():void {
// tradeService.fill(null);
tradeService.release();
// tradeService.releaseCollection(tradeCollection);
tradeService.channelSet.disconnectAll();
tradeService.disconnect();
tradeService.logout();
//tradeService.dataStore = null;
/*Function for creating destination*/
private function createDestination(destName:String):void{
var remoteService:RemoteObject = new RemoteObject("DestinationManager");
remoteService.addEventListener(ResultEvent.RESULT, resultHandler,false,0,true);
var operation:AbstractOperation = remoteService.getOperation("createDestination");
operation.send(destName);
var cs:ChannelSet = new ChannelSet();
var rtmpChannel:RTMPChannel = ServerConfig.getChannel("my-rtmp") as RTMPChannel;
cs.addChannel(rtmpChannel);
tradeService = new DataService() ;
tradeService.destination=destName;
tradeService.channelSet = cs;
//This function calls dataservice fill method depending on wheather destination is created or not
private function resultHandler(event:ResultEvent):void{
//call data service as destination is created successfully
var status:Boolean = event.result as Boolean
// Alert.show("status="+status);
if(status){
getData();
else{
//TODO report error to MATS app
public function removeAll():void{
if(tradeList.dataProvider){
tradeCollection.source = new Array();
tradeList.dataProvider.source = new Array();
tradeList.dataProvider = null;
tradeService.release();
// tradeService.releaseCollection(tradeCollection);
tradeService.channelSet.disconnectAll();
tradeService.disconnect();
tradeService.logout();
System.gc();
public function loadData():void
var remoteService:RemoteObject = new RemoteObject("filterRemoteVO");
var operation:AbstractOperation = remoteService.getOperation("loadData");
tradeService.fill(tradeCollection);
operation.send(rowData.text ,GUIID);
tradeList.dataProvider = tradeCollection;
]]>
</mx:Script>
<mx:DataGrid id="tradeList"
initialize="tradeList.dataProvider = tradeCollection" horizontalScrollPolicy="auto"
height="659" x="0" y="84">
<mx:columns>
<mx:DataGridColumn headerText="Security Description" dataField="securityDesc"
/>
<mx:DataGridColumn headerText="B/S" dataField="transactionType"
/>
<mx:DataGridColumn headerText="Amount" dataField="amount"
/>
<mx:DataGridColumn headerText="Price Text" dataField="priceText"
/>
<mx:DataGridColumn headerText="Counterparty" dataField="counterParty"
/>
<mx:DataGridColumn headerText="Trade Date" dataField="tradeDate"
/>
<mx:DataGridColumn headerText="Settle Date" dataField="settleDate"
/>
<mx:DataGridColumn headerText="Trade Status" dataField="tradeStatusId"
/>
<mx:DataGridColumn headerText="Trader" dataField="trader"
/>
<mx:DataGridColumn headerText="Salesperson" dataField="salesperson"
/>
<mx:DataGridColumn headerText="Ticket Number" dataField="tradeNumber"
/>
<mx:DataGridColumn headerText="Entry Date" dataField="tradeTime"
/>
<mx:DataGridColumn headerText="Cancel Date" dataField="cancelDate"
/>
<mx:DataGridColumn headerText="Cancel Time" dataField="cancelTime"
/>
</mx:columns>
</mx:DataGrid >
<mx:Grid x="149" y="23" width="995">
<mx:GridRow width="100%" height="100%">
<mx:GridItem width="100%" height="100%">
<mx:Label text="Enter No of obejcts" width="111"/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:TextInput name="row" id="rowData" width="97"/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:Button label="Load Data" click='loadData()'/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:Button label="removeAll" click='removeAll()'/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:Label text="Total Memory"/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:TextInput text="Total Memory" id="memory" width="97"/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:Label text="Grid Row Count"/>
</mx:GridItem>
<mx:GridItem width="100%" height="100%">
<mx:TextInput name="GridRowCountN" id="GridRowCount" width="97"/>
</mx:GridItem>
</mx:GridRow>
</mx:Grid>
</mx:Application>Hi Natasha,
Sorry for late reply.
I tried your suggestion but It did not help to release memory. Actully,this app contains only one event handler which is for remote method call , I dont think this could cause any memory leak.
Profiling session reveals that It is the issue of DataService class.I dont know How do I convince Adobe to investigate this issue.
Regards,
Dharmendra -
Memory leak in OCI while using AQ
There seems to be a serious memory leak in the OCI driver (9.2.0.1) when using a JAVA client to dequeue a database queue (Advanced Queuing).
Continuous dequeuing causes the heap memory to increase, and this memory never gets freed which leads me to suspect a memory leak in the OCI components (as the memory allocated for the JVM is constant). The heap memory increases by 3-4 MB after a dequeue of 1000 RAW messages,
Has anyone come across this problem before and if so are there any solutions? Changing to a thin driver is not a solution for me due to other requirements.
I'm using using Oracle client v9.2.0.1 libraries running on Solaris 8.
The source code for my JAVA test client is as below:
/* JAVA dequeue */
package com.ubsw.risk.pce.eventqueues.test;
import oracle.AQ.*;
import java.sql.*;
import oracle.jdbc.*;
public class testRawDequeue {
public testRawDequeue() {
public static void main(String[] args) {
Connection conn = null;
AQSession aq_sess = null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
//Use OCI connection
conn = DriverManager.getConnection("jdbc:oracle:oci:@DB_NAME.world","user","password");
conn.setAutoCommit(false);
Class.forName("oracle.AQ.AQOracleDriver");
while(true) {
aq_sess = AQDriverManager.createAQSession(conn);
runTest(aq_sess);
aq_sess.close();
aq_sess = null;
System.gc();
} catch (Exception e) {
e.printStackTrace();
System.out.println(e.toString());
try {
if (aq_sess != null) {
aq_sess.close();
if (conn != null) {
conn.close();
} catch (SQLException sqle) {
public static void runTest(AQSession aq_sess) throws AQException, SQLException
AQQueueTable q_table;
AQQueue queue;
AQMessage message;
AQRawPayload raw_payload;
AQEnqueueOption enq_option;
String test_data = "new message";
AQDequeueOption deq_option;
byte[] b_array;
/* Get a handle to a queue - in aquser schema: */
queue = aq_sess.getQueue ("user", "raw_msg_queue");
System.out.println("Successful getQueue");
/* Creating a AQDequeueOption object with default options: */
deq_option = new AQDequeueOption();
/* Dequeue a message: */
message = queue.dequeue(deq_option);
System.out.println("Successful dequeue");
/* Retrieve raw data from the message: */
raw_payload = message.getRawPayload();
b_array = raw_payload.getBytes();
System.out.println("bytes:" + b_array.toString());
queue.close();
((AQOracleSession)aq_sess).getDBConnection().commit();This sounds very similar to the memory leak I have in Oracle 9i using Pro*C++. Everytime a connect is made memory appears to leak and it only happens in multithreaded mode not default mode. There is a thread about this under the Oracle C++ call interface. Under 9i it appears to leak about 60K per connect rather than 60 bytes.
Paul -
Memory Leak in 8.1.6.0.1 JDBC/OCI for Solaris
Hello,
there is a memory leak in the 8.1.6.0.1 JDBC-OCI driver for solaris.
The leak causes your jvm to eat up all memory
if you reuse callable statements
(calling one statement multiple times with
different values).
The thin driver has no such problem. Is
there any fix available ?Ok. The code spans multiple classes and
most of it comes from a customized version
of the Enhydra Java Application server.
I have a class called "StandardDBConnection"
which caches CallableStatements and is a
wrapperclass for java.sql.DBConnection. The
interesting method here is "prepareCall":
* Get a callable statement given an SQL string. If the statement is
* cached, return that statement, otherwise prepare and save in the
* cache.
* @param sql The SQL statement to be called.
* @return a new CallableStatement object containing the
* pre-compiled SQL statement.
* @exception java.sql.SQLException If a database access error occurs
* statement.
public synchronized CallableStatement prepareCall(String sql)
throws SQLException {
PreparedStatement preparedStmt;
logDebug ("Prepare call: " + sql);
validate();
preparedStmt = (PreparedStatement)preparedStmtCache.get(sql);
// Check if the object returned by the cache really is a
// callable statement. if it is not, someone did call first
// prepareStatement() and now prepareCall() with the same
// sql. Silently replace the existing cache entry by a
// callable statement in this case.
if (preparedStmt instanceof CallableStatement) {
preparedStmt.clearParameters();
else {
// Need to close the old PreparedStatement in case we have to
// replace it with a CallableStatement
if (preparedStmt != null) {
preparedStmt.close();
else if (preparedStmtCache.size() >= maxPreparedStmts) {
String key = (String)preparedStmtCache.keys().nextElement();
((PreparedStatement) preparedStmtCache.remove(key)).close();
preparedStmt = connection.prepareCall(sql);
preparedStmtCache.put(sql, preparedStmt);
return (CallableStatement)preparedStmt;
The statements get closed when I close the
connection:
boolean closeStmts = true;
// Close the prepared statements.
Enumeration e = preparedStmtCache.keys();
while (e.hasMoreElements() && closeStmts) {
String key = (String)e.nextElement();
try {
((PreparedStatement)
preparedStmtCache.remove(key)).close();
} catch (SQLException except) {
// Ignore errors, we maybe handling one.
closeStmts = false;
log.write(Logger.NOTICE,
"DBConnection[" + id + "]: " + url +
"\nUnable to close statements. Continuing....\n");
In my classes using database queries I just
use the prepareCall method of DBConnection
and do not have to care about anything.
Works perfectly with the thin driver, but
as soon as I switch to oci... :-|
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JDBC Dev Team:
Soda, Rupper,
Do you mind posting some code that shows us what your code was doing when you notice this leak?
Thanks.<HR></BLOCKQUOTE>
null -
Custom MediaStreamSource and Memory Leaks During SampleRequested
Greetings,
I have a nasty memory leak problem that is causing me to pull my hair out.
I'm implementing a custom MediaStreamSource along with MediaTranscoder to generate video to disk. The frame generation operation occurs in the SampleRequested handler (as in the MediaStreamSource example). No matter what I do - and I've tried a
ton of options - inevitably the app runs out of memory after a couple hundred frames of HD video. Investigating, I see that indeed GC.GetTotalMemory reports an increasing, and never decreasing, amount of allocated RAM.
The frame generator in my actual app is using RenderTargetBitmap to get screen captures, and is handing the buffer to MediaStreamSample.CreateFromBuffer(). However, as you can see in the example below, the issue occurs even with a dumb allocation
of RAM and no other actual logic. Here's the code:
void _mss_SampleRequested(Windows.Media.Core.MediaStreamSource sender, MediaStreamSourceSampleRequestedEventArgs args)
if ( args.Request.StreamDescriptor is VideoStreamDescriptor )
if (_FrameCount >= 3000) return;
var videoDeferral = args.Request.GetDeferral();
var descriptor = (VideoStreamDescriptor)args.Request.StreamDescriptor;
uint frameWidth = descriptor.EncodingProperties.Width;
uint frameHeight = descriptor.EncodingProperties.Height;
uint size = frameWidth * frameHeight * 4;
byte[] buffer = null;
try
buffer = new byte[size];
// do something to create the frame
catch
App.LogAction("Ran out of memory", this);
return;
args.Request.Sample = MediaStreamSample.CreateFromBuffer(buffer.AsBuffer(), TimeFromFrame(_FrameCount++, _frameSource.Framerate));
args.Request.Sample.Duration = TimeFromFrame(1, _frameSource.Framerate);
buffer = null; // attempt to release the memory
videoDeferral.Complete();
App.LogAction("Completed Video frame " + (_FrameCount-1).ToString() + "\n" +
"Allocated memory: " + GC.GetTotalMemory(true), this);
return;
It usually fails around frame 357, with GC.GetTotalMemory() reporting 750MB allocated.
I've tried tons of work-arounds, none of which made a difference. I tried putting the code that allocates the bytes in a separate thread - no dice. I tried Task.Delay to give the GC a chance to work, on the assumption that it just had no time
to do its job. No luck.
As another experiment, I wanted to see if the problem went away if I allocated memory each frame, but never assigned it to the MediaStreamSample, instead giving the sample (constant) dummy data. Indeed, in that scenario, memory consumption stayed
constant. However, while I never get an out-of-memory exception, RequestSample just stops getting called around frame 1600 and as a result the transcode operation never actually returns to completion.
I also tried taking a cue from the SDK sample which uses C++ entirely to generate the frame. So I passed the buffer as a Platform::Array<BYTE> to a static Runtime extension class function I wrote in C++.
I won't bore you with the C++ code, but even directly copying the bytes of the array to the media sample using memcpy still had the same result! It seems that there is no way to communicate the contents of the byte[] array to the media sample without
it never being released.
I know what some will say: the difference between my code and the SDK sample, of course, is that the SDK sample generates the frame _entirely_ in C++, thus taking care of its own memory allocation and deallocation. Because I want to get
the data from RenderTargetBitmap, this isn't an option for me. (As a side note, if anyone knows if there's a way to get the contents of an RT Window using DirectX, that might work too, but I know this is not a C++ forum, so...). But more importantly,
MediaStreamSource and MediaStreamSample are managed classes that appear to allow you to generate custom frames using C# or other managed code. The MediaStreamSample.CreateFromBuffer function appears to be tailored for exactly what I want. But there appears
to be no way to release the buffer when giving the bytes to the MediaStreamSample. At least none that I can find.
I know the RT version of these classes are new to Windows 8.1, but I did see other posts going back 3 years discussing a similar issue in Silverlight. That never appears to have been resolved.
I guess the question boils down to this: how do I safely get managed data, allocated during the SampleRequested handler, to the MediaStreamSample without causing a memory leak? Also, why would the SampleRequested handler just stop getting called
out of the blue, even when I artificially eliminate the memory leak problem?
Thanks so much for all input!Hi Rob -
Thanks for your quick reply and for clarifying the terminology.
In the Memory Usage test under Analyze/Performance and Diagnostics (is that what you mean?) it's clear that each frame of video being created is not released from memory except when memory consumption gets very high. GC will occasionally kick in, but eventually
it succumbs.
Interestingly, if I reduce the frame size substantially, say 320x240, it never runs out of RAM no matter how many frames I throw at it. The Memory Usage test, however, shows the same pattern. But this time the GC can keep up and release the RAM.
After playing with this ad nauseum, I am fairly convinced I know what the problem is, but the solution still escapes me. It appears that the Transcoder is requesting frames from the MediaStreamSource (and the MediaStreamSource is providing them via
my SampleRequested handler) faster than the Transcoder can write them to disk and release them. Why would this be happening? The MediaStreamSource.BufferTime property is - I thought - used to prevent this very problem. However, changing the BufferTime seems
to have no effect at all - even changing it to ZERO doesn't change anything. If I'm right, this would explain why the GC can't do its job - it can't release the buffers I'm giving to the Transcoder via SampleRequested because the Transcoder won't give them
up until it's finished transcoding and writing them to disk. And yet the transcoder keeps requesting samples until there's no more memory to create them with.
The following code, which I made from scratch to illustrate my scenario, should be air-tight according to everything I've read. And yet, it still runs out of memory when the frame size is too large.
If you or anyone else can spot the problem in this code, I'd be thrilled to hear it. Maybe I'm omitting a key step with regard to getting the deferral? Or maybe it's a bug in the back-end? Can I "slow down" the transcoder and force it to release samples
it's already used?
Anyway here's the new code, which other than App.cs is everything. So if I'm doing something wrong it will be in this module:
using System;
using System.Collections.Generic;
using System.IO;
using System.Threading.Tasks;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Diagnostics;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.UI.Popups;
using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.Storage.Streams;
using Windows.Media.MediaProperties;
using Windows.Media.Core;
using Windows.Media.Transcoding;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace MyTranscodeTest
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
MediaTranscoder _transcoder;
MediaStreamSource _mss;
VideoStreamDescriptor _videoSourceDescriptor;
const int c_width = 1920;
const int c_height = 1080;
const int c_frames = 10000;
const int c_frNumerator = 30000;
const int c_frDenominator = 1001;
uint _frameSizeBytes;
uint _frameDurationTicks;
uint _transcodePositionTicks = 0;
uint _frameCurrent = 0;
Random _random = new Random();
public MainPage()
this.InitializeComponent();
private async void GoButtonClicked(object sender, RoutedEventArgs e)
Windows.Storage.Pickers.FileSavePicker picker = new Windows.Storage.Pickers.FileSavePicker();
picker.FileTypeChoices.Add("MP4 File", new List<string>() { ".MP4" });
Windows.Storage.StorageFile file = await picker.PickSaveFileAsync();
if (file == null) return;
Stream outputStream = await file.OpenStreamForWriteAsync();
var transcodeTask = (await this.InitializeTranscoderAsync(outputStream)).TranscodeAsync();
transcodeTask.Progress = (asyncInfo, progressInfo) =>
Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
_ProgressReport.Text = "Sourcing frame " + _frameCurrent.ToString() + " of " + c_frames.ToString() +
" with " + GC.GetTotalMemory(false).ToString() + " bytes allocated.";
await transcodeTask;
MessageDialog dialog = new MessageDialog("Transcode completed.");
await dialog.ShowAsync();
async Task<PrepareTranscodeResult> InitializeTranscoderAsync (Stream output)
_transcoder = new MediaTranscoder();
_transcoder.HardwareAccelerationEnabled = false;
_videoSourceDescriptor = new VideoStreamDescriptor(VideoEncodingProperties.CreateUncompressed( MediaEncodingSubtypes.Bgra8, c_width, c_height ));
_videoSourceDescriptor.EncodingProperties.PixelAspectRatio.Numerator = 1;
_videoSourceDescriptor.EncodingProperties.PixelAspectRatio.Denominator = 1;
_videoSourceDescriptor.EncodingProperties.FrameRate.Numerator = c_frNumerator;
_videoSourceDescriptor.EncodingProperties.FrameRate.Denominator = c_frDenominator;
_videoSourceDescriptor.EncodingProperties.Bitrate = (uint)((c_width * c_height * 4 * 8 * (ulong)c_frDenominator) / (ulong)c_frNumerator);
_frameDurationTicks = (uint)(10000000 * (ulong)c_frDenominator / (ulong)c_frNumerator);
_frameSizeBytes = c_width * c_height * 4;
_mss = new MediaStreamSource(_videoSourceDescriptor);
_mss.BufferTime = TimeSpan.FromTicks(_frameDurationTicks);
_mss.Duration = TimeSpan.FromTicks( _frameDurationTicks * c_frames );
_mss.Starting += _mss_Starting;
_mss.Paused += _mss_Paused;
_mss.SampleRequested += _mss_SampleRequested;
MediaEncodingProfile outputProfile = MediaEncodingProfile.CreateMp4(VideoEncodingQuality.Ntsc);
outputProfile.Audio = null;
return await _transcoder.PrepareMediaStreamSourceTranscodeAsync(_mss, output.AsRandomAccessStream(), outputProfile);
void _mss_Paused(MediaStreamSource sender, object args)
throw new NotImplementedException();
void _mss_Starting(MediaStreamSource sender, MediaStreamSourceStartingEventArgs args)
args.Request.SetActualStartPosition(new TimeSpan(0));
/// <summary>
/// This is derived from the sample in "Windows 8.1 Apps with Xaml and C# Unleashed"
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
void _mss_SampleRequested(MediaStreamSource sender, MediaStreamSourceSampleRequestedEventArgs args)
if (_frameCurrent == c_frames) return;
var deferral = args.Request.GetDeferral();
byte[] frameBuffer;
try
frameBuffer = new byte[_frameSizeBytes];
this._random.NextBytes(frameBuffer);
catch
throw new Exception("Sample source ran out of RAM");
args.Request.Sample = MediaStreamSample.CreateFromBuffer(frameBuffer.AsBuffer(), TimeSpan.FromTicks(_transcodePositionTicks));
args.Request.Sample.Duration = TimeSpan.FromTicks(_frameDurationTicks);
args.Request.Sample.KeyFrame = true;
_transcodePositionTicks += _frameDurationTicks;
_frameCurrent++;
deferral.Complete();
Again, I can't see any reason why this shouldn't work. You'll note it mirrors pretty closely the sample in the Windows 8.1 Apps With Xaml Unleashed book (Chapter 14). The difference is I'm feeding the samples to a transcoder rather than a MediaElement (which,
again should be no issue).
Thanks again for any suggestions!
Peter -
Memory leak in OCCI/libclnts on Linux RHEL 5.5 ? Please advise...
Hi all,
Starting with some background:
I have an application that has been running on 32-bit Linux server for years without problem, a few weeks ago it was ported to 64-bit RHEL 5.5 (compiled with -m32). Now with the application in the new environment some processes are growing in memorysize.
I have tried to pinpoint the memory leak with Valgrind and have numerous leaks reported in "libclntsh.so", "libocci.so" and "libnnz11.so"
Examples:
==30114== Use of uninitialised value of size 4
==30114== at 0xA61BAD7: ztcedecb (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0xA61B1E2: ztcedencbk (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0xA61AA0A: ztcebn (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0xA61A561: ztcen (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8DA9725: ztceenc (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8E68920: ztcrbm (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8E684D5: ztcrbh (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8E68393: ztcrbp (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8E682C6: ztcr2seed (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8E6827F: ztcrseed3 (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8DAA24A: ztcsh (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x99727D7: kpucpcreate (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
And:
==30114== Conditional jump or move depends on uninitialised value(s)
==30114== at 0x8E69BBC: ztvo5ke (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8D55E68: kpu8lgn (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8D53E56: kpuauthxa (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8D536DB: kpuauth (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x996EB99: kpucpinithstnode (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x996FFB1: kpucpcrecons (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x9972871: kpucpcreate (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x9821048: OCIConnectionPoolCreate (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x7BFB896: oracle::occi::ConnectionPoolImpl::initialise(oracle::occi::EnvironmentImpl*, void*, unsigned int, void*, unsigned int, void*, unsigned int, unsigned int, unsigned int, unsigned int) (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
==30114== by 0x7BFBB79: ZN6oracle4occi18ConnectionPoolImplC9EPNS015EnvironmentImplERKSsS5_S5_jjj (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
==30114== by 0x7BFBAC7: oracle::occi::ConnectionPoolImpl::ConnectionPoolImpl(oracle::occi::EnvironmentImpl*, std::string const&, std::string const&, std::string const&, unsigned int, unsigned int, unsigned int) (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
==30114== by 0x7BF2C13: oracle::occi::EnvironmentImpl::createConnectionPool(std::string const&, std::string const&, std::string const&, unsigned int, unsigned int, unsigned int) (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
And:
==30114== Conditional jump or move depends on uninitialised value(s)
==30114== at 0xAC3B2A5: CMP_RecomputeLength (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libnnz11.so)
==30114== by 0xAC3B9EC: CMP_Divide (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libnnz11.so)
==30114== by 0xAC3B5BA: CMP_ModularReduce (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libnnz11.so)
==30114== by 0xAC3A2E6: Alg_ComputeModQ_GHash (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libnnz11.so)
==30114== by 0xAC3AA30: A_X931RandomGenerateBytes (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libnnz11.so)
==30114== by 0x8E681F0: ztcr2rnd (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8DAA260: ztcsh (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8CD0125: kpusattr (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x8CE96CD: OCIAttrSet (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libclntsh.so.11.1)
==30114== by 0x7BF6184: oracle::occi::ConnectionImpl::openConnection(OCIEnv*, OCIError*, void*, unsigned int, void*, unsigned int, void*, unsigned int, void*, unsigned int, unsigned int, void*, unsigned int, oracle::occi::Connection::Purity, oracle::occi::StatelessConnectionPool::PoolType) (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
==30114== by 0x7BF9C29: ZN6oracle4occi14ConnectionImplC9EPNS018ConnectionPoolImplERKSsS5_ (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
==30114== by 0x7BF9AD1: oracle::occi::ConnectionImpl::ConnectionImpl(oracle::occi::ConnectionPoolImpl*, std::string const&, std::string const&) (in /soe3/opt/oracle-1/product/32bit-client-11.2.0.2/lib/libocci.so.11.1)
There has been quite a few changes due to the new server. New compiler (gcc) from version 2.96 to 4.1.2, new version of oracle client 10g to 11g (11.2.0.2), new version of OCCI (also 11.2.0.2). The applications sourcecode is pretty much unchanged though, and that is why I turn to all of you for help.
Is there anyone who knows anything about this problem and how to even start to fix this leak (if it even is in OCCI)?
I can supply sourcecode and/or logs if needed. It is quite a lot of complex code so it might take me a while to sort out the relevant code though...Thanks for your input! Tough this post is from some time ago this is still an issue for me I'm afraid, so I appreciate all the help I can get.
I have stripped down the code to just the basic functions needed to replicate the problem. The pool creation and connections are the same as in our application (which is unchanged since before the porting). Though the following code makes no indications of a leak when run through Valgrind, it still grows when checked in "top". It could be that I stripped the code too much, but this is pretty much what our application does. It creates a database lock (not in this code), creates connection, (read table), terminates connection and release lock every 6 seconds to check if there is any new assignments added...
#include <iostream>
#include <string>
#include <occi.h>
using namespace oracle::occi;
using namespace std;
Environment *env;
ConnectionPool *connPool;
Connection *con;
int x, loopnr;
string usr = "test_user";
string pwd = "test_pw";
string url = "dbtest";
void run(int x) { // Run loops
for(int i=0; i<x; i++){ // Loop connect and disconnect x number of times
try {
fflush(stdout); // Update console row for count value
con = connPool->createConnection (usr, pwd); // Connect
usleep(100000);
connPool->terminateConnection (con); // Disconnect
cout << "\r"; // Update console row for count value
cout << loopnr << endl; // Print number of loops done
usleep(100000);
loopnr++; // Count number of loops done
catch(SQLException ex) { // Exception handling
cout<<"SQLException"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
int main(int argc,char* argv[]) {
cout << "IN --- main()\n";
if(argc == 2) { // Read number of loops as argument...
x = atoi(argv[1]);
else { // ...or run loop 200 times if no args
x = 200;
try{
env = Environment::createEnvironment (Environment::DEFAULT); // Create environment
loopnr = 1;
connPool = env->createConnectionPool(usr, pwd, url, 1, 2, 1); // Create pool
run(x); // Run loops
catch(SQLException ex) { // Exception handling
cout<<"SQLException"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
env->terminateConnectionPool (connPool); // Cleanup Pool when done
Environment::terminateEnvironment (env); // Cleanup Environment when done
cout << "\nUT --- main()\n";
return 0;
Above code is built with the following makefile:
ORACLE_HOME=/opt/oracle/product/32bit-client-11.2.0.2
CXXFLAGS = -Wall -m32 -g -fPIC \
-I$(ORACLE_HOME)/rdbms/public
LDLIBS = -L$(ORACLE_HOME)/lib/ -locci \
-L$(ORACLE_HOME)/rdbms/lib/ -lclntsh
LDFLAGS = -m32
default: all
Sample: Sample.cc
all: Sample
clean:
rm -f Sample *.o
Hopefully someone can make sense out of this....
Edited by: StLa on 2011-nov-23 04:57 -
Potential Memory Leak during Marshelling of a Web Service Response
I believe I have found a memory leak when using the configuration below.
The memory leak occurs when calling a web service. When the web service function is marshelling the response of the function call, an "500 Internal Server Error ... java.lang.OutOfMemoryError" is returned from OC4J. This error may be seen via the TCP Packet Monitor in JDeveloper.
Unfortunately no exception dump is outputted to the OC4J log.
Configuration:
Windows 2000 with 1 gig ram
JDeveloper 9.0.5.2 with JAX/RPC extension installed
OC4J 10.0.3
Sun JVM version 1.4.2_03-b02
To demonstrate the error I created a simple web service and client. See below the client and web service function that demonstrates it.
The web service is made up of a single function called "queryTestOutput".
It returns an object of class "TestOutputQueryResult" which contains an int and an array.
The function call accepts a one int input parameter which is used to vary the size of array in the returned object.
For small int (less than 100). Web service function returns successfully.
For larger int and depending on the size of memory configuration when OC4J is launched,
the OutOfMemoryError is returned.
The package "ws_issue.service" contains the web service.
I used the Generate JAX-RPC proxy to build the client (found in package "ws_issue.client"). Package "types" was
also created by Generate JAX-RPC proxy.
To test the web service call execute the class runClient. Vary the int "atestValue" until error is returned.
I have tried this with all three encodings: RPC/Encoded, RPC/Literal, Document/Literal. They have the
same issue.
The OutOfMemory Error is raised fairly consistently using the java settings -Xms386m -Xmx386m for OC4J when 750 is specified for the input parameter.
I also noticed that when 600 is specified, the client seems to hang. According to the TCP Packet Monitor,
the response is returned. But, the client seems unable to unmarshal the message.
** file runClient.java
// -- this client is using Document/Literal
package ws_issue.client;
public class runClient
public runClient()
* @param args
* Test out the web service
* Play with the atestValue variable to until exception
public static void main(String[] args)
//runClient runClient = new runClient();
long startTime;
int atestValue = 1;
atestValue = 2;
//atestValue = 105; // last one to work with default memory settings in oc4j
//atestValue = 106; // out of memory error as seen in TCP Packet Monitor
// fails with default memory settings in oc4j
//atestValue = 600; // hangs client (TCP Packet Monitor shows response)
// when oc4j memory sessions are -Xms386m -Xmx386m
atestValue = 750; // out of memory error as seen in TCP Packet Monitor
// when oc4j memory sessions are -Xms386m -Xmx386m
try
startTime = System.currentTimeMillis();
Ws_issueInterface ws = (Ws_issueInterface) (new Ws_issue_Impl().getWs_issueInterfacePort());
System.out.println("Time to obtain port: " + (System.currentTimeMillis() - startTime) );
// call the web service function
startTime = System.currentTimeMillis();
types.QueryTestOutputResponse qr = ws.queryTestOutput(new types.QueryTestOutput(atestValue));
System.out.println("Time to call queryTestOutput: " + (System.currentTimeMillis() - startTime) );
startTime = System.currentTimeMillis();
types.TestOutputQueryResult r = qr.getResult();
System.out.println("Time to call getresult: " + (System.currentTimeMillis() - startTime) );
System.out.println("records returned: " + r.getRecordsReturned());
for (int i = 0; i<atestValue; i++)
types.TestOutput t = r.getTestOutputResults();
System.out.println(t.getTestGroup() + ", " + t.getUnitNumber());
catch (Exception e)
e.printStackTrace();
** file wsmain.java
package ws_issue.service;
import java.rmi.RemoteException;
import javax.xml.rpc.ServiceException;
import javax.xml.rpc.server.ServiceLifecycle;
public class wsmain implements ServiceLifecycle, ws_issueInterface
public wsmain()
public void init (Object p0) throws ServiceException
public void destroy ()
System.out.println("inside ws destroy");
* create an element of the array with some hardcoded values
private TestOutput createTestOutput(int cnt)
TestOutput t = new TestOutput();
t.setComments("here are some comments");
t.setConfigRevisionNo("1");
t.setItemNumber("123123123");
t.setItemRevision("arev" + cnt);
t.setTestGroup(cnt);
t.setTestedItemNumber("123123123");
t.setTestedItemRevision("arev" + cnt);
t.setTestResult("testResult");
t.setSoftwareVersion("version");
t.setTestConditions("conditions");
t.setStageName("world's a stage");
t.setTestMode("Test");
t.setTestName("test name");
t.setUnitNumber("UnitNumber"+cnt);
return t;
* Web service function that is called
* Create recCnt number of "records" to be returned
public TestOutputQueryResult queryTestOutput (int recCnt) throws java.rmi.RemoteException
System.out.println("Inside web service function queryTestOutput");
TestOutputQueryResult r = new TestOutputQueryResult();
TestOutput TOArray[] = new TestOutput[recCnt];
for (int i = 0; i< recCnt; i++)
TOArray[i] = createTestOutput(i);
r.setRecordsReturned(recCnt);
r.setTestOutputResults(TOArray);
System.out.println("End of web service function call");
return r;
* @param args
public static void main(String[] args)
wsmain wsmain = new wsmain();
int aval = 5;
try
TestOutputQueryResult r = wsmain.queryTestOutput(aval);
for (int i = 0; i<aval; i++)
TestOutput t = r.getTestOutputResults()[i];
System.out.println(t.getTestGroup() + ", " + t.getUnitNumber());
catch (Exception e)
e.printStackTrace();
** file ws_issueInterface.java
package ws_issue.service;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface ws_issueInterface extends java.rmi.Remote
public TestOutputQueryResult queryTestOutput (int recCnt) throws java.rmi.RemoteException;
** file TestOutputQueryResult.java
package ws_issue.service;
public class TestOutputQueryResult
private long recordsReturned;
private TestOutput[] testOutputResults;
public TestOutputQueryResult()
public long getRecordsReturned()
return recordsReturned;
public void setRecordsReturned(long recordsReturned)
this.recordsReturned = recordsReturned;
public TestOutput[] getTestOutputResults()
return testOutputResults;
public void setTestOutputResults(TestOutput[] testOutputResults)
this.testOutputResults = testOutputResults;
** file TestOutput.java
package ws_issue.service;
public class TestOutput
private String itemNumber;
private String itemRevision;
private String configRevisionNo;
private String testName;
private String testConditions;
private String stageName;
private String testedItemNumber;
private String testedItemRevision;
private String unitNumber;
private String testStation;
private String testResult;
private String softwareVersion;
private String operatorID;
private String testDate; // to be datetime
private String comments;
private int testGroup;
private String testMode;
public TestOutput()
public String getComments()
return comments;
public void setComments(String comments)
this.comments = comments;
public String getConfigRevisionNo()
return configRevisionNo;
public void setConfigRevisionNo(String configRevisionNo)
this.configRevisionNo = configRevisionNo;
public String getItemNumber()
return itemNumber;
public void setItemNumber(String itemNumber)
this.itemNumber = itemNumber;
public String getItemRevision()
return itemRevision;
public void setItemRevision(String itemRevision)
this.itemRevision = itemRevision;
public String getOperatorID()
return operatorID;
public void setOperatorID(String operatorID)
this.operatorID = operatorID;
public String getSoftwareVersion()
return softwareVersion;
public void setSoftwareVersion(String softwareVersion)
this.softwareVersion = softwareVersion;
public String getStageName()
return stageName;
public void setStageName(String stageName)
this.stageName = stageName;
public String getTestConditions()
return testConditions;
public void setTestConditions(String testConditions)
this.testConditions = testConditions;
public String getTestDate()
return testDate;
public void setTestDate(String testDate)
this.testDate = testDate;
public String getTestName()
return testName;
public void setTestName(String testName)
this.testName = testName;
public String getTestResult()
return testResult;
public void setTestResult(String testResult)
this.testResult = testResult;
public String getTestStation()
return testStation;
public void setTestStation(String testStation)
this.testStation = testStation;
public String getTestedItemNumber()
return testedItemNumber;
public void setTestedItemNumber(String testedItemNumber)
this.testedItemNumber = testedItemNumber;
public String getTestedItemRevision()
return testedItemRevision;
public void setTestedItemRevision(String testedItemRevision)
this.testedItemRevision = testedItemRevision;
public String getUnitNumber()
return unitNumber;
public void setUnitNumber(String unitNumber)
this.unitNumber = unitNumber;
public int getTestGroup()
return testGroup;
public void setTestGroup(int testGroup)
this.testGroup = testGroup;
public String getTestMode()
return testMode;
public void setTestMode(String testMode)
this.testMode = testMode;I use web services a lot and I sympathize with your issue. I
struggle with similar issues and I found this great utility that
will help you confirm if your webservice is returning the data
correctly to Flex. I know you said it works in other applications
but who knows if flex is calling it correctly etc. This utility is
been the most amazing tool in helping me resolve web service
issues.
http://www.charlesproxy.com/
Once you can confirm the data being returned is good you can
try several things in flex. Try changing your result format to
object or e4x etc. See how that plays out. Not sure where your
tapping in to look at your debugger, you might want to catch it
right at the result handler before converting to any collections. .
If nothing here helps maybe post some code to look at. .
. -
Hi,
I have written a small C++ code which will load a JDBC Driver and connect to the database.
The code initially Loads the JVM & than connects to the Database.
When i tested the code with Boundscheket I found a conciderable amount of memory leak & all of these are shown in jvm.dll, zip.dll & java.dll. Is this OK? Are there memory leaks in JNI?Hi, Please go through the code & let me know if there are any memory leaks in this code. Boundchecker detects a considerable amount of memory leak :(
#include <windows.h>
#include <stdio.h>
#include <jni.h>
#include <conio.h>
#define INI_MAX_PROPERTY_VALUE 1024
#define JVMPATH "C:\\Java\\jdk1.5\\jre\\bin\\client\\jvm.dll"
#define JDBCDRIVER "-Djava.class.path=D:\\mysql-connector-java.jar";
#define CONNECTIONSTRING "jdbc:mysql://localhost:3306/test?user=root&password=root"
#define DRIVERCLASS "com/mysql/jdbc/Driver"
JavaVM *jvm = NULL;
unsigned long int jvmVersion = 0x00010004;
HINSTANCE lib_handle = NULL;
void fini() {
jint res = jvm->DestroyJavaVM();
printf ("Destroying JVM %d\n",res);
if (lib_handle) {
FreeLibrary(lib_handle);
printf ("Deleted lib handle\n");
void init()
char jvmPath[INI_MAX_PROPERTY_VALUE + 1];
jint res = -1;
JNIEnv *jniEnv = NULL;
JavaVMInitArgs vm_args;
JavaVMOption options[1];
options[0].optionString = JDBCDRIVER;
vm_args.version = jvmVersion;
vm_args.options = options;
vm_args.nOptions = 1;
vm_args.ignoreUnrecognized = JNI_TRUE;
memset(jvmPath, '\0', INI_MAX_PROPERTY_VALUE + 1);
strcpy(jvmPath,JVMPATH);
printf("Loading dll from %s\n",jvmPath);
lib_handle = LoadLibrary(jvmPath);
if (!lib_handle)
printf("Error during LoadLibrary\n");
return;
printf("JVM dll Loaded Sucessfully\n");
jint (__stdcall JNI_CreateJavaVM)( JavaVM*, void**, void*);
JNI_CreateJavaVM = (jint (__stdcall *)(JavaVM**, void**, void*))GetProcAddress(lib_handle, "JNI_CreateJavaVM");
if (NULL != JNI_CreateJavaVM)
res = (JNI_CreateJavaVM)( &jvm, (void**)&jniEnv , &vm_args);
if ( res < 0 ) {
printf("Unable to create JVM\n");
} else {
printf("JVM Created Succesfully\n");
void printException(JNIEnv *jniEnv) {
jthrowable exceptionHandle = jniEnv->ExceptionOccurred();
if ( exceptionHandle == NULL )
return;
/* Clear the exception from the enviroment*/
jniEnv->ExceptionClear();
/* Obtain the JavaException object to get its details */
jclass jThrowableClass = jniEnv->GetObjectClass(exceptionHandle);
if ( jThrowableClass == NULL ) {
if (exceptionHandle)
jniEnv->DeleteLocalRef(exceptionHandle);
exceptionHandle = NULL;
return ;
printf("\n*****----- Java Error Message is -----*****\n");
jmethodID midMessage = jniEnv->GetMethodID( jThrowableClass, "toString", "()Ljava/lang/String;" );
if ( midMessage == NULL ){
if (exceptionHandle)
jniEnv->DeleteLocalRef(exceptionHandle);
if (jThrowableClass)
jniEnv->DeleteLocalRef(jThrowableClass);
exceptionHandle = NULL;
jThrowableClass = NULL;
return;
jstring jstrRet = (jstring)jniEnv->CallObjectMethod(exceptionHandle,midMessage);
if ( jstrRet == NULL ){
if (exceptionHandle)
jniEnv->DeleteLocalRef(exceptionHandle);
if (jThrowableClass)
jniEnv->DeleteLocalRef(jThrowableClass);
exceptionHandle = NULL;
jThrowableClass = NULL;
return;
jboolean flg;
const char *pExceptionStr = jniEnv->GetStringUTFChars(jstrRet, &flg);
if ( flg == JNI_TRUE ) {
printf("%s",pExceptionStr);
jniEnv->ReleaseStringUTFChars(jstrRet, pExceptionStr);
if (exceptionHandle)
jniEnv->DeleteLocalRef(exceptionHandle);
if (jThrowableClass)
jniEnv->DeleteLocalRef(jThrowableClass);
if (jstrRet)
jniEnv->DeleteLocalRef(jstrRet);
exceptionHandle = NULL;
jThrowableClass = NULL;
jstrRet = NULL;
printf("\n**************---------End of Java Error Message ************\n");
return;
void connect() {
jint res = -1;
JNIEnv *jniEnv = NULL;
jclass clsDriver = NULL;
jmethodID colnstructorDriver = NULL;
jmethodID methodConnect = NULL;
jobject objectDriver = NULL;
jobject objectConnection = NULL;
jstring jConnectionString = NULL;
printf("Getting the Enviroment\n");
jint isPresent = jvm->GetEnv((void **)&jniEnv, jvmVersion );
if (isPresent == JNI_EDETACHED || jniEnv == NULL) {
printf("Could not get JNI Env for current thread");
return;
printf("Creating Instance of Driver\n");
clsDriver = jniEnv->FindClass(DRIVERCLASS);
colnstructorDriver = jniEnv->GetMethodID(clsDriver, "<init>", "()V");
objectDriver = jniEnv->NewObject( clsDriver, colnstructorDriver );
printf("Created Instance of Driver\n");
printf("Connecting to the Database\n");
methodConnect = jniEnv->GetMethodID(clsDriver, "connect", "(Ljava/lang/String;Ljava/util/Properties;)Ljava/sql/Connection;");
jConnectionString = jniEnv->NewStringUTF(CONNECTIONSTRING);
objectConnection = jniEnv->CallObjectMethod(objectDriver, methodConnect, jConnectionString, NULL);
if (objectConnection == NULL) {
printException(jniEnv);
printf("Unable to Connect\n");
else
printf("Connection Done\n");
//Releasing all the memory used....
if (objectConnection)
jniEnv->DeleteLocalRef(objectConnection);
if (jConnectionString)
jniEnv->DeleteLocalRef(jConnectionString);
if (objectDriver)
jniEnv->DeleteLocalRef(objectDriver);
if (clsDriver)
jniEnv->DeleteLocalRef(clsDriver);
objectConnection = NULL;
jConnectionString = NULL;
objectDriver = NULL;
clsDriver = NULL;
int main() {
printf ("Starting...\n");
init();
connect();
fini();
getch();
} -
I've created a simple servlet to EJB skeleton and built a stress testing
tool to make sequential requests to the servlet which in turn creates an
instance of a stateless session been. Both the servlet and bean do not have
any real logic in them, just some minimal timing output.
When run for a few million iterations, the WebLogic JVM slowly leaks memory
that cannot be reclaimed even with force garbage collection from the
WebLogic console. Below are 3 snippets of code showing the servlet, the EJB
call, and the simple client test.
If anyone else is ecperiencing similar problems or can see a flaw, I'd be
most grateful.
Andy
Servlet code
protected void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
TestBean bean;
long requestStartTime = System.currentTimeMillis();
res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<html><head><title>Hello World!</title></head>");
out.println("<body><h1>Hello World!</h1></body></html>");
try {
bean = home.create();;
bean.testMethod();
catch (Exception e) {
totalTime += (System.currentTimeMillis() - requestStartTime);
Bean code
public class TestBean implements SessionBean {
private SessionContext ctx;
public void ejbActivate() {
public void ejbPassivate() {
public void ejbCreate() {
public void ejbRemove() {
public void setSessionContext(SessionContext ctx) {
this.ctx = ctx;
public void testMethod() {
Client code
public void simulateLoad()
throws IOException
long totalRequestTime = 0, requestTime, requestStartTime;
long totalResponseTime = 0, responseTime, responseStartTime;
try {
log("Opening connection to "+ url + (debug ? "?debug=true" : ""));
for (int i = 1; i <= numRequests; i++) {
HTTPConnection con = new HTTPConnection("localhost",7001);
HTTPResponse rsp;
byte data[];
if ((i % 10000) == 0) {
log("\nGET Request "+i+" to "+ url + (debug ? "?debug=true" :
requestStartTime = System.currentTimeMillis();
rsp = con.Get("/mcumanager" + (debug ? "?debug=true" : ""));
requestTime = System.currentTimeMillis() - requestStartTime;
responseStartTime = System.currentTimeMillis();
if (rsp.getStatusCode() >= 300) {
log("Received Error: "+rsp.getReasonLine());
log(new String(rsp.getData()));
else
data = rsp.getData();
responseTime = System.currentTimeMillis() - responseStartTime;
totalRequestTime += requestTime;
totalResponseTime += responseTime;
if ((i % 10000) == 0) {
log("GET Response "+i+": "+rsp);
if ((i % 100) == 0) {
log ("Avg request time :
"+((float)totalRequestTime/(float)i)+"ms");
log ("Avg response time :
"+((float)totalResponseTime/(float)i)+"ms");
catch (IOException ioe) {
log(ioe.toString());
ioe.printStackTrace();
catch (ModuleException me) {
log("Error handling request: " + me.getMessage());
me.printStackTrace();
Please read discussion "WLS dies during stress testing" & "performance
degradation PROBLEM" in interest.performance.
Hope it helps.
Cheers - Wei
Andy Riedel <[email protected]> wrote in message
news:[email protected]...
> I have additional information on this problem. I have replicated the exact
> same memory leak issue using the included HelloWorldServlet. I use Jrun's
> ServletKiller stress tool running 16 simultaneous request threads
requesting
> the HelloWorldServlet. This WebLogic 5.1 server will leak memory and
> eventually run out of memory all together with an OutOfMemoryException
after
> about 6-8 hours. This indicates that the bug is in the base HTTP Servlet
> engine code.
>
> I have tried turning off the http log (i.e. access.log) as well as
> notification events from the servlet engine and it still leaks memory.
>
> Andy
>
>
>
> Andy Riedel Chief Architect HearMe Call me through VoiceCONTACTtm -- right
> from your computer. Online Status:
> "Andy Riedel" <[email protected]> wrote in message
> news:[email protected]...
> > I've created a simple servlet to EJB skeleton and built a stress testing
> > tool to make sequential requests to the servlet which in turn creates an
> > instance of a stateless session been. Both the servlet and bean do not
> have
> > any real logic in them, just some minimal timing output.
> >
> > When run for a few million iterations, the WebLogic JVM slowly leaks
> memory
> > that cannot be reclaimed even with force garbage collection from the
> > WebLogic console. Below are 3 snippets of code showing the servlet, the
> EJB
> > call, and the simple client test.
> >
> > If anyone else is ecperiencing similar problems or can see a flaw, I'd
be
> > most grateful.
> >
> > Andy
> >
> >
> > Servlet code
> > -------------
> >
> > protected void doGet(HttpServletRequest req, HttpServletResponse res)
> > throws ServletException, IOException
> > {
> > TestBean bean;
> >
> > long requestStartTime = System.currentTimeMillis();
> >
> > res.setContentType("text/html");
> > PrintWriter out = res.getWriter();
> > out.println("<html><head><title>Hello World!</title></head>");
> > out.println("<body><h1>Hello World!</h1></body></html>");
> >
> > try {
> > bean = home.create();;
> > bean.testMethod();
> > }
> > catch (Exception e) {
> > }
> >
> > totalTime += (System.currentTimeMillis() - requestStartTime);
> > }
> >
> > Bean code
> > -----------
> > public class TestBean implements SessionBean {
> >
> > private SessionContext ctx;
> >
> > public void ejbActivate() {
> > }
> >
> > public void ejbPassivate() {
> > }
> >
> > public void ejbCreate() {
> > }
> >
> > public void ejbRemove() {
> > }
> >
> > public void setSessionContext(SessionContext ctx) {
> > this.ctx = ctx;
> > }
> >
> > public void testMethod() {
> > }
> > }
> >
> > Client code
> > ------------
> > public void simulateLoad()
> > throws IOException
> > {
> > long totalRequestTime = 0, requestTime, requestStartTime;
> > long totalResponseTime = 0, responseTime, responseStartTime;
> >
> > try {
> > log("Opening connection to "+ url + (debug ? "?debug=true" : ""));
> >
> > for (int i = 1; i <= numRequests; i++) {
> >
> > HTTPConnection con = new HTTPConnection("localhost",7001);
> > HTTPResponse rsp;
> > byte data[];
> >
> > if ((i % 10000) == 0) {
> > log("\nGET Request "+i+" to "+ url + (debug ? "?debug=true" :
> > ""));
> > }
> >
> > requestStartTime = System.currentTimeMillis();
> >
> > rsp = con.Get("/mcumanager" + (debug ? "?debug=true" : ""));
> >
> > requestTime = System.currentTimeMillis() - requestStartTime;
> >
> > responseStartTime = System.currentTimeMillis();
> >
> > if (rsp.getStatusCode() >= 300) {
> > log("Received Error: "+rsp.getReasonLine());
> > log(new String(rsp.getData()));
> > }
> > else
> > data = rsp.getData();
> >
> > responseTime = System.currentTimeMillis() - responseStartTime;
> >
> > totalRequestTime += requestTime;
> > totalResponseTime += responseTime;
> >
> > if ((i % 10000) == 0) {
> > log("GET Response "+i+": "+rsp);
> > }
> >
> > if ((i % 100) == 0) {
> > log ("Avg request time :
> > "+((float)totalRequestTime/(float)i)+"ms");
> > log ("Avg response time :
> > "+((float)totalResponseTime/(float)i)+"ms");
> > }
> > }
> > }
> > catch (IOException ioe) {
> > log(ioe.toString());
> > ioe.printStackTrace();
> > }
> > catch (ModuleException me) {
> > log("Error handling request: " + me.getMessage());
> > me.printStackTrace();
> > }
> > }
> >
> >
> >
> >
> >
>
>
-
Hello,
I've created a swing program with internalframes. each internalframes has many objects
and uses a lot of memory. Each time a frame is closed i call disopse on it and i am 'sure'
that there are no more references to the internalframe.
So logically, i can open lots of iframes and close them all. The the memory usage bij java.exe
shoudl be teh same. But that is not the case. I saw garbage collects only frees memmory to
the JVM. But how do i know whether the objects are freed or not.
Should'nt the memory usage decrease when i close all the opened iframes????
The question: How do i know for sure if i do not have any references to an iframe so that the iframe can be collected by the garbage collector? The memory of the program keeps growing and growing if i open 10 frames, close all the frames and then do that all over again.
Help me!Hi,
we had major problems with Swing components leaking memory.
Since Swing components have internal references to the child components, one container could
be leaking lots of memory.
NB : you must explicitely remove all listeners too, action listeners, mouse listeners etc.
Below is a very handy piece of code I wrote to explicitely remove all child components from an initial container. It's depth first recursive, and it certainly done wonders for us.
regards,
Owen
import java.awt.Container;
import java.awt.Component;
import javax.swing.RootPaneContainer;
public class ComponentCleaner
public static void cleanComponent(Component baseComponent)
try
cleanComponent(baseComponent, 0);
catch ( Exception ignore )
// give some exception handling...
* The "depth" parameter was being used for text output debugging.
* But isn't essential now. I'll keep it anyways, as it avoids
* calling the garbage collector every recursion.
protected static void cleanComponent(Component baseComponent,
int depth)
if (baseComponent == null) // recursion terminating clause
return ;
Container cont;
Component[] childComponents;
int numChildren;
// clean up component containers
if(baseComponent instanceof Container)
// now clean up container instance variables
if(baseComponent instanceof RootPaneContainer)
{ // Swing specialised container
cont = (Container)baseComponent;
numChildren = cont.getComponentCount();
childComponents = cont.getComponents();
for(int i = 0;i < numChildren;i++)
// remove each component from the current container
// each child component may be a container itself
cleanComponent(childComponents, depth + 1);
((RootPaneContainer)cont).getContentPane().remove(childComponents[i]);
((RootPaneContainer)cont).getContentPane().setLayout(null);
else
{ // General Swing, and AWT, Containers
cont = (Container)baseComponent;
numChildren = cont.getComponentCount();
childComponents = cont.getComponents();
for(int i = 0;i < numChildren;i++) //for(int i = 0;i < numChildren;i++)
// remove each component from the current container
// each child component may be a container itself
cleanComponent(childComponents[i], depth + 1);
cont.remove(childComponents[i]);
cont.setLayout(null);
} // if component is also a container -
Memory leak via object input stream (yes I'm resetting)
I am seeing that my system is piling up char[] (according to netbeans profiler tool). I am running JDK 1.5 on linux, the client and server code look like this. The strings are piling up on the client side only. the allocation tree looks like this:
char[]
java.lang.String.<init>
java.lang.StringBuffer.toString()
java.io.ObjectInputStream$BlockDataInputStream.readUTFBody(long)
java.io.ObjectInputStream.readString(boolean)
all the way to my client side code for receiving messages.
Does anyone have any suggestions for something I'm missing?
Client side code for receiving messages:
TaskMessage tm = null;
try
ServerProcessor.debugPrint( "waiting on message from server" );
try
tm = ( TaskMessage ) fromServer.readObject();
catch ( ClassNotFoundException cnfe )
System.out.println( "Class not found exception while reading from server" );
catch ( IOException e )
System.out.println( "failed to make connection with server, disconnecting" );
m_connector.getProcessor().disconnect();
// kill the thread
isFinished = true;
catch ( Exception e )
System.err.println( "Caught exception while reading message from server.\nAssuming disconnect, attempting to reconnect" );
fromServer = m_connector.reconnect();
m_connector.getProcessor().disconnect();
isFinished = true;
// if we have a message then dispatch it
if ( tm != null )
ServerProcessor.debugPrint( "got non-null message from server" );
m_connector.serverMessageReceived( tm );
}Client side code for senting messages:
public void sendServerMessage( TaskMessage tm )
try
ServerProcessor.debugPrint( "Sending message back to server" );
m_out.writeObject( tm );
m_out.flush();
m_out.reset();
ServerProcessor.debugPrint( "Sent back to server at: " + System.currentTimeMillis() );
catch ( IOException ioe )
System.out.println( "Unable to communicate with server." );
ioe.printStackTrace();
catch ( Exception e )
// catch this silently... hopefully to avoid the broken pipe error display ( we handle it... just elsewhere )
if ( tm.getType() != m_lastMessageType )
m_lastMessageType = tm.getType();
Runtime.getRuntime().gc();
System.out.println( "Remaining memory on client at the start of type " + tm.getType() + ": " + Runtime.getRuntime().freeMemory() );
}Server Side Code for sending messages:
try
out.writeObject( m );
out.flush();
out.reset();
catch ( Exception ioe )
droppedClient();
}Server side code for receiving messages:
// read the message
TaskMessage m = null;
try
// will block here trying to read the clients reply
m = ( TaskMessage ) in.readObject();
ServerProcessor.debugPrint( "Received message at: " + System.currentTimeMillis() );
ServerProcessor.debugPrint( "got client response" );
catch ( ClassNotFoundException cnfe )
System.out.println( "Unable to locate TaskMessage Class" );
cnfe.printStackTrace();
}I do have another memory leak in the system, what I am trying to determine from this post is if the way I am using read and write object may be contributing to that leak. I was hoping someone would be able to look at the communication code and let me know if I'm properly reseting the streams. Then at the very least I can rule this code out as the problem location and continue tracing the use of the read strings throughout the code.
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