9i JDeveloper, nullPointerException, thin driver to 9i on Linux-Help

Environment Win2K with 9i client software.
I have 9i JDeveloper configured on a Win2K machine such that it can connect to a Solaris 8 environment running 9i using a thin JDBC driver via the connections in the JDeveloper navigator. It works fine.
I can launch sqlplus from the Win2K machine and connect to 9i on SuSE 7.3, it works fine.
I can connect to the 9i DB on SuSE using Access 2000 and ODBC no problem.
On the SuSE side I also have 9i JDeveloper and it can connect via the connections wizard to the local 9i database and browse the schema.
I run through the connections wizard on my Win2K machine to setup my connection to 9i on SuSE 7.3 and test. it works fine.
The problem is when I try to open the database connection to 9i on SuSE from the Win2K machine from within JDeveloper. Then I get a NullPointerException - see below.
oracle.jdeveloper.cm.CMException: java.lang.NullPointerException
     void oracle.jdeveloper.cm.dt.browser.jdbc.JdbcBrowser.openConnectionBrowser(oracle.jdeveloper.cm.dt.ConnectionBrowsable)
     void oracle.jdeveloper.cm.dt.ConnectionNode.open()
     java.util.Iterator oracle.jdeveloper.cm.dt.ConnectionNode.getChildren()
     java.util.Iterator oracle.ideimpl.explorer.ExplorerNode.getChildNodes()
     void oracle.ideimpl.explorer.BaseTreeExplorer.addChildren(oracle.ide.explorer.TNode)
     void oracle.ideimpl.explorer.BaseTreeExplorer$4.run()
     void java.awt.event.InvocationEvent.dispatch()
     void java.awt.EventQueue.dispatchEvent(java.awt.AWTEvent)
     boolean java.awt.EventDispatchThread.pumpOneEventForHierarchy(java.awt.Component)
     void java.awt.EventDispatchThread.pumpEventsForHierarchy(java.awt.Conditional, java.awt.Component)
     void java.awt.Dialog.show()
     void java.awt.Component.show(boolean)
     void java.awt.Component.setVisible(boolean)
But if I look at the listener.log on SuSE is looks like the connection succeeded.
service_update * mydev * 0
25-AUG-2002 09:43:14 * service_update * mydev * 0
25-AUG-2002 09:53:16 * service_update * mydev * 0
25-AUG-2002 10:01:05 * (CONNECT_DATA=(SID=mydev)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.100)(PORT=1059)) * establish * mydev * 0
25-AUG-2002 10:01:10 * (CONNECT_DATA=(SID=mydev)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.100)(PORT=1060)) * establish * mydev * 0
25-AUG-2002 10:01:12 * service_update * mydev * 0
25-AUG-2002 10:01:15 * service_update * mydev * 0
I see no difference in the log between this failed connection and the successful connection I get when I connect using JDeveloper on SuSE connecting to 9i on SuSE other than a different IP address.
I am at a loss. Can anybody give me a clue as to why I am getting the null pointer exception when I try to open a database connection from Win2K JDeveloper to 9i on SuSE. I have also tried a URL string and that fails as well.
Thanks
Hunch

Bob,
The error you are getting is not related to connecting to the database. Instead, it is a bug inside of JDeveloper that is related to expanding the database connection in the Navigator.
Off the top of my head, I'm not sure what the problem is, but I will try to look back through our bug logs to see what I can dig up. In the meantime, can your confirm for me that the version of JDeveloper you are using is the 9.0.2 production release?
- John McGinnis
Oracle JDeveloper Team

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sree
"Ramu" <[email protected]> wrote in message
news:3d5bbc3a$[email protected]..
>
Yes. I am trying to create a connection pool in weblogic and I have theweblogic
class path setup correctly. It points to classes111.zip andnls_charset11.zip.
>
-Ramu
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return fileName;
public static void close(Connection con) {
try {
if (con != null) {
con.close();
catch (Exception e) {
System.exit(-1);
public static void createTable(Connection con) {
Statement stmt ;
try {
stmt = con.createStatement();
stmt.execute("DROP TABLE basic_blob_table");
stmt.close();
catch (SQLException sqlEx) {
System.out.println("Dropped the Table");
try {
stmt = con.createStatement();
stmt.execute("CREATE TABLE basic_blob_table ( x varchar2(30), b blob)");
stmt.close();
catch (SQLException sqlEx) {
sqlEx.printStackTrace();
close(con);
System.out.println("Created the Table");
public static void insertUsingOracleAPI(Connection con) {
OutputStream os = null;
Statement stmt = null;
ResultSet rs = null;
FileInputStream is = null;
try {
con.setAutoCommit(false);
stmt = con.createStatement();
stmt.execute("INSERT INTO basic_blob_table VALUES( 'OracleAPI', empty_blob())");
System.out.println("Inserted the dummy Row");
rs = stmt.executeQuery("Select * from basic_blob_table where x='OracleAPI'");
if (rs != null && rs.next()) {
BLOB blob = ((OracleResultSet)rs).getBLOB(2);
File file = new File(getFileName());
is = new FileInputStream(file);
os = blob.getBinaryOutputStream();
byte[] chunk = new byte[1024];
int length = -1;
while((length = is.read(chunk)) != -1)
os.write(chunk, 0,length);
System.out.println("Inserted the File " + getFileName() );
catch (Exception e) {
e.printStackTrace();
finally {
try {
if (os != null) {
os.flush();
os.close();
if (is != null)
is.close();
stmt.close();
con.commit();
con.setAutoCommit(true);
catch (Exception e) {}
public static void insertUsingJDBC20API(Connection con) {
PreparedStatement stmt = null;
FileInputStream is = null;
try {
stmt = con.prepareStatement("INSERT INTO basic_blob_table VALUES(?,?)");
File file = new File(getFileName());
is = new FileInputStream(file);
stmt.setString(1,"JDBC20API");
stmt.setBinaryStream(2,is,(int)file.length());
stmt.executeUpdate();
catch (Exception e) {
e.printStackTrace();
finally {
try {
if (is != null)
is.close();
stmt.close();
catch (Exception e) {}
null

Thanks for the response.
I understand what you are saying...
that readers don't block writers in Oracle (the same is true in SQL Server 2000).
However, I don't see how my test case is working correctly with Oracle (the exact same code acting as I'm thinking it should with SQL Server, but I still think it is acting incorrectly with Oracle).
I have transaction A do this:
update <table> set <column2>=<value> where <column1>='1'
then I use Thread.sleep() to make that program hang around for a few minutes.
Meanwhile I sneak off and start another program which begins transaction B. I have transaction B do this:
select * from <table> where <column1>='1'
and the read works immediately (no blocking... just as you have said) however, transaction A is still sleeping, it has not called commit() or rollback() yet.
So what if transaction A were to call rollback(), the value read by transaction B would be incorrect wouldn't it ?
Both A and B use setAutoCommit(false) to start their transactions, and then call setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED).
Isn't that supposed to guarantee that a reader can only read what is committed ?
And if a row is in "flux"... in the process of having one or more values changed, then the database cannot say what the value will be ?
I can almost see what you are saying.
In letting the reader have what it wants without making it wait, I suppose it could be said that Oracle is holding true to the "only let committed data be read"
So if that's it, then what if I want the blocking ?
I want an entire row to be locked until whoever it in the middle of updating, adding, or removing it has finished.
Do you know if that can be done with Oracle ? And how ?
Thanks again for helping me.

8.1.6 thin driver and Netscape plug in 1.2.2

Hi.
I'm trying to use the latest Oracle thin driver in an applet
using Netscapes plug-in 1.2.2.
I am getting the error below when I call
DriverManager.getConnection
The error seems to be a security error.
The code and driver works fine in a standalone application under
JDK 1.2.
The database I am connecting to is the same machine as the web
server and I am not using a firewall so there should be no
security violations. I have tried using both DNS name and IP
address for the target machine but I always get the same error.
Has anyone been able to use the 8.1.6 thin driver in an applet on
Netscape?
Thanks in advance, Sean.
-------Error message ------
java.lang.ExceptionInInitializerError:
java.security.AccessControlException: access denied
(java.util.PropertyPermission JdbcTrace read)
at
java.security.AccessControlContext.checkPermission(Unknown
Source)
at java.security.AccessController.checkPermission(Unknown
Source)
at java.lang.SecurityManager.checkPermission(Unknown
Source)
at java.lang.SecurityManager.checkPropertyAccess(Unknown
Source)
at java.lang.System.getProperty(Unknown Source)
at
oracle.jdbc.driver.OracleLog.<clinit>(OracleLog.java:604)
at
oracle.jdbc.dbaccess.DBConversion.<init>(DBConversion.java:87)
at
oracle.jdbc.ttc7.TTCConversion.<init>(TTCConversion.java:75)
at
oracle.jdbc.ttc7.TTC7Protocol.connect(TTC7Protocol.java:1126)
at
oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:182)
at
oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:
156)
at
oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDrive
r.java:231)
at
oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:208)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at JDBCTest.init(JDBCTest.java:10)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
null

It appears that your may be turning tracing on which is in turn requiring access to properties on the local file system. Use JDK 1.2.2's policytool to add a policy for either the Codebase, or sign your applet and then by Codebase and Sign By, adding a PropertyPermission, A Target of *, and an Action of read.

Memory leak in weblogic 6.0 sp2 oracle 8.1.7 thin driver

Hi,
     I have a simple client that opens a database connection, selects from
a table containing five rows of data (with four columns in each row)
and then closes all connections. On running this in a loop, I get the
following error after some time:
<Nov 28, 2001 5:57:40 PM GMT+06:00> <Error> <Adapter>
<OutOfMemoryError in
Adapter
java.lang.OutOfMemoryError
<<no stack trace available>>
>
<Nov 28, 2001 5:57:40 PM GMT+06:00> <Error> <Kernel> <ExecuteRequest
failed
java.lang.OutOfMemoryError
I am running with a heap size of 64 Mb. The java command that runs
the client is:
java -ms64m -mx64m -cp .:/opt/bea/wlserver6.0/lib/weblogic.jar
-Djava.naming.f
actory.initial=weblogic.jndi.WLInitialContextFactory
-Djava.naming.provider.url=
t3://garlic:7001 -verbose:gc Test
The following is the client code that opens the db connection and does
the select:
import java.util.*;
import java.sql.*;
import javax.naming.*;
import javax.sql.*;
public class Test {
private static final String strQuery = "SELECT * from tblPromotion";
public static void main(String argv[])
throws Exception
String ctxFactory     = System.getProperty
("java.naming.factory.initial");
String providerUrl     = System.getProperty
("java.naming.provider.url");
Properties jndiEnv          = System.getProperties ();
System.out.println ("ctxFactory : " + ctxFactory);
System.out.println ("ProviderURL : " + providerUrl);
Context ctx     = new InitialContext (jndiEnv);
for (int i=0; i <1000000; i++)
System.out.println("Running query for the "+i+" time");
Connection con = null;
Statement stmnt = null;
ResultSet rs     = null;
try
DataSource ds     = (DataSource) ctx.lookup
(System.getProperty("eaMDataStore", "jdbc/eaMarket"));
con = ds.getConnection ();
stmnt = con.createStatement();
rs = stmnt.executeQuery(strQuery);
while (rs.next ())
//System.out.print(".");
//System.out.println(".");
ds = null;
catch (java.sql.SQLException sqle)
System.out.println("SQL Exception : "+sqle.getMessage());
finally
try {
rs.close ();
rs = null;
//System.out.println("closed result set");
} catch (Exception e) {
System.out.println("Exception closing result set");
try {
stmnt.close ();
stmnt = null;
//System.out.println("closed statement");
} catch (Exception e) {
System.out.println("Exception closing result set");
try {
con.close();
con = null;
//System.out.println("closed connection");
} catch (Exception e) {
System.out.println("Exception closing connection");
I am using the Oracle 8.1.7 thin driver. Please let me know if this
memory leak is a known issue or if its something I am doing.
thanks,
rudy

Repost in JDBC section ... very serious issue but it may be due to Oracle or
to WL ... does it happen if you test inside WL itself?
How many iterations does it take to blow? How long? Does changing to a
different driver (maybe Cloudscape) have the same result?
Peace,
Cameron Purdy
Tangosol Inc.
<< Tangosol Server: How Weblogic applications are customized >>
<< Download now from http://www.tangosol.com/download.jsp >>
"R.C." <[email protected]> wrote in message
news:[email protected]...
Hi,
I have a simple client that opens a database connection, selects from
a table containing five rows of data (with four columns in each row)
and then closes all connections. On running this in a loop, I get the
following error after some time:
<Nov 28, 2001 5:57:40 PM GMT+06:00> <Error> <Adapter>
<OutOfMemoryError in
Adapter
java.lang.OutOfMemoryError
<<no stack trace available>>
>
<Nov 28, 2001 5:57:40 PM GMT+06:00> <Error> <Kernel> <ExecuteRequest
failed
java.lang.OutOfMemoryError
I am running with a heap size of 64 Mb. The java command that runs
the client is:
java -ms64m -mx64m -cp .:/opt/bea/wlserver6.0/lib/weblogic.jar
-Djava.naming.f
actory.initial=weblogic.jndi.WLInitialContextFactory
-Djava.naming.provider.url=
t3://garlic:7001 -verbose:gc Test
The following is the client code that opens the db connection and does
the select:
import java.util.*;
import java.sql.*;
import javax.naming.*;
import javax.sql.*;
public class Test {
private static final String strQuery = "SELECT * from tblPromotion";
public static void main(String argv[])
throws Exception
String ctxFactory = System.getProperty
("java.naming.factory.initial");
String providerUrl = System.getProperty
("java.naming.provider.url");
Properties jndiEnv = System.getProperties ();
System.out.println ("ctxFactory : " + ctxFactory);
System.out.println ("ProviderURL : " + providerUrl);
Context ctx = new InitialContext (jndiEnv);
for (int i=0; i <1000000; i++)
System.out.println("Running query for the "+i+" time");
Connection con = null;
Statement stmnt = null;
ResultSet rs = null;
try
DataSource ds = (DataSource) ctx.lookup
(System.getProperty("eaMDataStore", "jdbc/eaMarket"));
con = ds.getConnection ();
stmnt = con.createStatement();
rs = stmnt.executeQuery(strQuery);
while (rs.next ())
//System.out.print(".");
//System.out.println(".");
ds = null;
catch (java.sql.SQLException sqle)
System.out.println("SQL Exception : "+sqle.getMessage());
finally
try {
rs.close ();
rs = null;
//System.out.println("closed result set");
} catch (Exception e) {
System.out.println("Exception closing result set");
try {
stmnt.close ();
stmnt = null;
//System.out.println("closed statement");
} catch (Exception e) {
System.out.println("Exception closing result set");
try {
con.close();
con = null;
//System.out.println("closed connection");
} catch (Exception e) {
System.out.println("Exception closing connection");
I am using the Oracle 8.1.7 thin driver. Please let me know if this
memory leak is a known issue or if its something I am doing.
thanks,
rudy

Problem w/ 8.1.6 Thin Driver and Oracle 8.0.5

I am attempting to connect to two data hosts.
One is Oracle 8.1.6, the other is Oracle 8.0.5. The DB Admin insists the user name and passwords are the same for both.
I am using the v8.1.6 100% Java thin driver under both JDK v1.2 and v1.3. My OS is Windows2K Professional.
I can always connect to the 8.1.6 database but never to the 8.0.5 database under any circumstances. The error I receive when attempting to connect to the 8.0.5 database is:
java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=134238208)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
Does any one have some insights here?
My test code fragment is as follows:
try{
Class.forName( "oracle.jdbc.driver.OracleDriver" ).newInstance();
String dbURL = "";
//dbURL = "jdbc:oracle:thin:@host1:1521:data_source_8_1_6";
dbURL = "jdbc:oracle:thin:@host2:1521:data_source_8_0_5";
Connection con = DriverManager.getConnection(dbURL, "test_user", "test_user");
java.sql.Statement stmt = con.createStatement();
String sq1String = "SELECT * FROM DUAL";
java.sql.ResultSet res = stmt.executeQuery(sq1String);
int rows = 0;
while(res.next()) {
rows++;
System.out.println("rows = " + rows);
catch(Exception e) {
System.out.println(e);
null

tnsping is working correctly. We can ping the host and it is listening on port 1521. Likewise, there are other applications inhouse using this datasource.
Since first posting my question, I have also tried running the test program on WinNT. Same problem arises.
Other suggestions?

Does oracle 8.1.6.0 jdbc thin driver support jdk1.3 and oracle 8.0.5 database ?

I have downloaded oracle 8.1.6.0 jdbc thin driver(named classes12.zip) to run with jdk1.3 to access oracle 8.0.5, but when I compile and run the jdbccheckup.java downloaded from oracle website like this:
javac -classpath d:\jdbc\classes12.zip jdbccheckup.java
(compile succeed)
java -classpath d:\jdbc\classes12.zip jdbccheckup
an error occured:
Exception in thread "main" java.lang.NoClassDefFoundError:jdbccheckup
Why??????

Try this isntead.
java -classpath d:\jdbc\classes12.zip;. jdbccheckup
an error occured:
Exception in thread "main" java.lang.NoClassDefFoundError:jdbccheckup
Why??????

Thin driver connection in oracle8i(8.1.5) on Linux with JDK1.2.2

JDBC Development team quote:
You can download the JDK 1.2 version of the 8.1.6 Thin driver from this site. It is 100% Pure Java and will run on Linux.
As you replied, I downloaded 8.1.6 Thin driver(classes12.zip) and nls_charset12.zip. Then, as instructed in readme file of 8.1.6, I modified CLASSPATH and add LD_LIBRARY_PATH.
I wrote a test program, and it compiled without errors. But when I excuted it, I got the error message below:
java.sql.SQLException: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNU
M=135286784)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
Is there any other installation procedures I missed?
Below is the test program I used:
import java.sql.*;
import oracle.jdbc.driver.*;
public class Test
public static void main (String args [])throws SQLException
//DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
catch(ClassNotFoundException e){
System.out.println("Cannot load the Driver");
Connection conn = DriverManager.getConnection ("jdbc:oracle:thin:@host:port:sid","id", "password");
Statement stmt = conn.createStatement ();
ResultSet rset = stmt.executeQuery ("select sysdate from dual");
while (rset.next ())
System.out.println (rset.getString (1));
I'd appreciate if you give me some insight.
null

It seems like the database listener is not setup properly. Please double check the listener is up and it's listening to the port you specified.
Thanks.

9i JDeveloper, nullPointerException, thin driver to 9i on Linux-Help

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