Memory leakage with oracle oci driver

I have developed a Solaris8 client/server application using the JAVA IDL CORBA implementation. The client sends requests to the server to update the database (database is Oracle 8.1.7 and I connect to it using oci oracle drivers). Requests are sent one at a time. No concurrent connections. I have a static connection that I establish with database once I start the server. If that connection is lost for any reason (timeout or database faliure) the application tries automatically to reconnect to database. I have noticed that if the new connection to database fails and an sql exception is thrown, memory used by the application process increases. This memory is not garbage collected so application hangs. I tried similar behaviour with the oracle thin driver and things went fine. There was no memory leakage.
I would really appreciate, if you can help me in this since I can't use the thin driver because of failover limitations.

I have noticed
that if the new connection to database fails and an
sql exception is thrown, memory used by the
application process increases.
How have you noticed this?I noticed this using the command pmap under solaris it operating system
every time I test reconnecting to database I go and check the memory used by the application before after attepmting to reconnect:
/usr/proc/bin/pmap [myapp pid] | tail -1
If I'm using normal connection then the memory will be increased by 100KB. If I'm using the OraclePooledConnection class then the increase will be something like 500KB. Again this is if still there is a problem connecting to database. If connection to database is okay then no memory increase at all.
This memory is not
garbage collected so application hangs.
Then it isn't a java problem. When java runs out of memory it throws a out of memory exception.Well I'm not saying it is a java problem for sure. I suspect that it might be oracle oci8 driver problem. I would appreciate if anyone can help in specifying teh source of the error.
I tried
similar behaviour with the oracle thin driver and
things went fine. There was no memory leakage.
I would really appreciate, if you can help me in this
since I can't use the thin driver because of failover
limitations.
I don't understand that last sentence at all.What I mean here is that instead of using the oci8 driver to connect to database I used the thin driver and kept everything else the same. I simulated the faliure to reconnect to database and based on the pmap command observations there was no memory leakage.
I want to know what is needed to be done in order to get a normal behavior once using the oci8 drivers.

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Rainer Meyer wrote:
Hello,
We found a potential bug in the kodo.jdbc.sql.OracleDictionary class
shipped as source with Kodo:
In newer Kodo versions (at least in 3.3.4), the method
public void setString (PreparedStatement stmnt, int idx, String
val, Column col)
has the following code block:
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&& val != null && val.length () != col.getSize ())
((OraclePreparedStatement) inner).setFixedCHAR (idx, val);
This block seems to be intended for select statements but is called on
inserts/updates also. The latter causes a known problem with the Oracle
oci driver when settings CHAR columns as FixedCHAR, which reports an
ORA-01401 error (inserted value too large for column) when definitely no
column is too long. This does not happen with the thin driver.
We reproduced this with 8.1.7 and 9.2.0 drivers.
For us we solved the problem by subclassing OracleDictionary and removing
the new code block.
Regards,
Rainer Meyer
ELAXY Financial Software & Solutions GmbH & Co. KG
Marc Prud'hommeaux
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properly and may be try getting the latest oracle drivers.
If you are trying to use weblogic jDrivers make sure your pool properties
are set right.
hth
sree
"Subba Rao.S..G" <[email protected]> wrote in message
news:[email protected]...
Presently our application is using weblogic 5.1 with oracle 8.1.6 database.
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weblogic/lib/solaris/oci815_8/libweblogicoci36.so
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connecting
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url=jdbc:oracle:thin:@169.165.38.162:1570:PBGSUP,
props=user=SUPPORT;password=
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Delaying 1 seconds before making a oraclePool pool connection.
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Delaying 1 seconds before making a oraclePool pool connection.
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I am using wl server 8.1, oracle oci driver (oracle 9i client), on solaris.
When i create a connection pool using the oci driver, it connects, and i
test it, and the tests run fine.
The Application works for a few days. Then eventually after disuse, say over
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------------WEBLOGIC MANAGED SERVER LOG----------
####<Mar 27, 2004 4:20:57 AM EST> <Error> <JDBC><<WLS Kernel>> <>
<BEA-001112> <Test "SELECT 1 FROM DUAL" set up for pool "CRCPool2" failed
with exception: "java.sql.SQLException: ORA-03113: end-of-file on
communication channel
".>
####<Mar 27, 2004 4:20:57 AM EST> <Info> <JDBC> <<WLS Kernel>> <>
<BEA-001128> <Connection for pool "CRCPool2" closed.>
---------- and then eventually this----------
####<Mar 28, 2004 4:33:11 AM EST> <Warning> <JDBC> <<WLS Kernel>> <>
<BEA-001129> <Received exception while creating connection for pool
"CRCPool2": ORA-12154: TNS:could not resolve service name
>

Ayan wrote:
I am using wl server 8.1, oracle oci driver (oracle 9i client), on solaris.
When i create a connection pool using the oci driver, it connects, and i
test it, and the tests run fine.
The Application works for a few days. Then eventually after disuse, say over
the weekend, I get exceptions in the log (the message is at end of email).
This is because it gives me a sql exception saying it cannot resolve the
service name. The database is up and running, confirmed.
I tried testing the connection pool manually through the console, and it
failed with the service name exception. But it would connect fine when i
used sqlplus to connect to the databse, using the same service name.
Why does this deteriorate over time? Is there a specific test that would
prevent this from happening?
Once i restart the weblogic server, the connection pool connects fine. But
this is not a solution, since I can't be restarting the server all the time.
Any one got any ideas?
-AyanHi. Is there a firewall between the weblogic server and DBMS? There is
a problem with OCI losing connectivity to the DBMS. OCI may be keeping
a socket open as long as the process (weblogic) is running.
Joe
------------WEBLOGIC MANAGED SERVER LOG----------
####<Mar 27, 2004 4:20:57 AM EST> <Error> <JDBC><<WLS Kernel>> <>
<BEA-001112> <Test "SELECT 1 FROM DUAL" set up for pool "CRCPool2" failed
with exception: "java.sql.SQLException: ORA-03113: end-of-file on
communication channel
".>
####<Mar 27, 2004 4:20:57 AM EST> <Info> <JDBC> <<WLS Kernel>> <>
<BEA-001128> <Connection for pool "CRCPool2" closed.>
---------- and then eventually this----------
####<Mar 28, 2004 4:33:11 AM EST> <Warning> <JDBC> <<WLS Kernel>> <>
<BEA-001129> <Received exception while creating connection for pool
"CRCPool2": ORA-12154: TNS:could not resolve service name

Using Oracle OCI Driver 8.1.6 in Compaq Tru64 fastVM

Hi!
I try to using Oracle OCI Driver in Compaq Tru64.
I used fast VM (with -fast option weblogic startup) then the result
during populating Connection Pool, weblogic server down with core dump
I attached core file.
is there anyone in this situation?
[weblogicOCITest.txt]

Try using the 8.1.7 Thin Driver (the 8.1.6 Thin driver is buggy).
"jungil, kim" wrote:
Hi!
I try to using Oracle OCI Driver in Compaq Tru64.
I used fast VM (with -fast option weblogic startup) then the result
during populating Connection Pool, weblogic server down with core dump
I attached core file.
is there anyone in this situation?
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mon/ScheduleDef.class^T^O!0
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duleDef...°R!x.E+i! weblogic/time/common/ScheduleDef°R!.E X^M^G!@”K!.E&^Ai!0webl
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local class weblogic.time.common.ScheduleDef°R!0.E2˜…^H!^A^P.Eh@ .E .E'^A!^A?@X
^A!
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G!@”K!.Ep^Ai!^WLoaded i!0Loaded weblogic.time.common.ScheduleDef from i!pLoaded
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^^E!eøÑ6!!/E!/E

Problem in executing a SP in Java using Oracle OCI Driver...

Hi,
I have a installed the Oracle OCI driver on iPlanet Web Server 4.1. The application has been designed using the Jakarta Struts framework where the dom classes act as an interface between the database and the application(action classes). The dom classes execute stored procedures stored in an SP packages (eg. DDTS_PACK.setContact(..)). Now here's the problem. When a new record is being inserted, the dom executes the 'setContact' stored procedure using a java.sql.CallableStatement. The execution of this stored procedure is successful at times and fails at times. What could be the reason?? Could it be something to do with connection pooling. The default connection pooling class from oracle, oracle.jdbc.pool.OracleConnectionCacheImpl() is being used to get the connection. The funny thing is that the stored procedure gets executed both the time (success/failure) and returns a return status as 'N' when it fails and 'Y' when it is successful.
I would be greatful to anybody who could give a solution to the above problem. Thanks and have a great day.
Regards,
Anand

Since the pipe '|' is interpreted by the shell then you need the shell to invoke your command
String[] command = {"sh","-c","find /tmp/reports1 -name " + "\"" + "*" + "\"" + " -mtime +" + strdaysback + " -print|xargs rm -r"};
final Process process = Runtime.getRuntime().exec(command);
You should also read http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html at least twice and implement the recommendation regarding stdout and stderr.
P.S. Why are you not using Java to find and delete these files?
Message was edited by:
sabre150

Can I create connection pool by oracle oci driver?

Can I create connection pool by oracle oci driver?My weblogic's version is 6.1 sp2 and oracle is 9.0.1.2.
I have some trouble with connection pool created by weblogic jDriver.
I try to read Timestamp from table and I always get the exception.It told me that ORA-00932: inconsistent datatypes.
So I created another pool by oracle thin driver and everything was right.Then I created other pool by oracle oci driver,but something were wrong. 'Could not create pool connection. The DBMS driver exception was:java.sql.SQLException: ORA-06401: NETCMN:Invalid driver designator'
The oci pool's parameters are below lines.
url: jdbc:oracle:oci:@COCO
Driver Classname: oracle.jdbc.driver.OracleDriver
Properties: user=scott;password=tiger;protocol=oci
If I get connection directly,don't use connection pool,I can get right connection.But why didn't I create pool by oci driver?Maybe weblogic7 or weblogic8 will work good?

Venkat Amirineni wrote:
Hi Joe,
I am also trying to create a connection pool using Oracle Oci XA. Weblogic
type 2 oci threads hanging on native calls and suggested to go for thin drivers.
But we want to try with Oracle Oci drivers.. Can you please tell us how to
create a conn pool using Oracle Oci.. Just the driverclass and url is enough
or need any classpath settings etc..
Thanks in advance for your quick reply.Hi. As far as driver properties, just use what Oracle says to. Any pool properties
that we recommend for XA would still apply. Note that Oracle themselves recommends
the thin driver over their OCI one:
http://download-west.oracle.com/docs/cd/B14117_01/java.101/b10979.pdf
Joe

Error in configuring Oracle OCI Driver in WLS

My application uses Oracle OCI driver for making JDBC connection from the server application.I have installed Oracle client in the machine.Added the Oracle Bin directory to System Path.But when i try to create the connection Pool Weblogic throws the error saying DLL file is not found in System.Library.Path.Can you help in solving this problem,Config detailsOS - Windows 2000 ProfessionalWeblogic 5.1 serverOracle 8.1.7 clientDriver used Oracle OCI driver...Expecting a reply

You need to set your path to point to the <wls-install-home>/bin/oci8xx_x/
folder as well. I dont think 5.1 supports 817 type 2 driver, you may have to
use the thin driver from oracle instead.
sree
"Varadharajan" <[email protected]> wrote in message
news:3b8f070f$[email protected]..
My application uses Oracle OCI driver for making JDBC connection from theserver application.I have installed Oracle client in the machine.Added the
Oracle Bin directory to System Path.But when i try to create the connection
Pool Weblogic throws the error saying DLL file is not found in
System.Library.Path.Can you help in solving this problem,Config detailsOS -
Windows 2000 ProfessionalWeblogic 5.1 serverOracle 8.1.7 clientDriver used
Oracle OCI driver...Expecting a reply

Petstore throws populateServlet error with Oracle thin driver

When i point connection pool to Oracle database, i get the following error. The
data is populated in the database, looks like when petstore is enumerating db
tables and make sure all tables exist, this error is happening. Some how, database
metadata coming as NULL. Has anybody tried petstore with Oracle JDBC driver?
thanks,
PopulateServlet Error:
java.lang.NullPointerException java.lang.NullPointerException at com.sun.j2ee.blueprints.tools.populate.web.PopulateServlet.checkTables(PopulateServlet.java:276)
at com.sun.j2ee.blueprints.tools.populate.web.PopulateServlet.doGet(PopulateServlet.java:127)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2456)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2039)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

I believe that you do not have weblogicaux.jar in your classpath.
-Selvan
Laurie Cohen wrote:
Im using Solaris 2.7 with WLS 5.1.0 and Commerce Server 2.0.1 with
current service packs on both. JDK 1.2.1_04 and the Oracle thin driver
(classes111.zip which I am told is the only one supported in this
configuration). Has anyone seen this problem? Is it that the driver is
using 1.1 and I only have 1.2 installed?
devapp01% java -classpath
/usr/local/weblogic/classes:/usr/local/weblogic/license utils.t3dbping
t3://localhost:7601 username password "" oracle.jdbc.driver.OracleDriver
jdbc:oracle:thin:@10.200.201.110:1521:q01c
Connecting to WebLogic with the WebLogic JDBC Driver
Exception in thread "main" java.lang.NoClassDefFoundError:
com/sun/java/util/collections/ArrayList
at weblogic.kernel.Kernel.declareProperties(Kernel.java:253)
at weblogic.kernel.Kernel.ensureInitialized(Kernel.java:107)
at weblogic.common.T3Client.<init>(T3Client.java:218)
at weblogic.common.T3Client.<init>(T3Client.java:269)
at weblogic.common.T3Client.<init>(T3Client.java:323)
at weblogic.jdbcbase.t3.Driver.connect(Driver.java:121)
at java.sql.DriverManager.getConnection(Compiled Code)
at java.sql.DriverManager.getConnection(DriverManager.java:106)
at utils.t3dbping.main(t3dbping.java:115)
Thanks,
Laurie

Update Batching With Oracle Thin Driver

executeBatch() method throws missing IN or Out Parameters when used with Oracle
thin driver(jdbc.oracle.driver.OracleDriver)

Thanks for the reply. But, I tried it and I still get the same problem. Now
I am running on Solaris 7. Does that make a difference?
-Sudheendra
"Slava Imeshev" <[email protected]> wrote in message
news:[email protected]..
Hi Sudheendra,
Here is the patch for 5.1 put it as the first thing
in weblogic.classpath.
Regards,
Slava Imeshev
"Sudheendra Galgali" <[email protected]> wrote in message
news:3b69a4be$[email protected]..
I am having a similar problem with WL 5.1, service pack 9 with Oracle Thin
drivers. I am unable to find patch CR047274 either. Help please!
"Soumik" <[email protected]> wrote in message
news:[email protected]..
executeBatch() method throws missing IN or Out Parameters when used with
Oracle
thin driver(jdbc.oracle.driver.OracleDriver)

ORA-24816 error with oracle 10 driver

Friends,
I am getting the following error with Oracle 10 driver while trying to insert data > 4k into a LONG column. The table also contains another column of type varchar2(4000). The code works perfectly fine with Oracle 9i driver.
ORA-24816: Expanded non LONG bind data supplied after actual LONG or LOB column
Kindly let me know if this is a programming error or a driver problem.
Thanks,
Vinay

this driver you mentioned, is it the jdbc driver?
ORA-24816:     Expanded non LONG bind data supplied after actual LONG or LOB column
Cause:     A Bind value of length potentially > 4000 bytes follows binding for LOB or LONG.
Action:     Re-order the binds so that the LONG bind or LOB binds are all at the end of the bind list.
using this forum may be more efficient -> http://forums.oracle.com/forums/forum.jspa?forumID=99&start=0

Getting error with oracle oci type driver

Hi,
while I'm using the oracle oci type driver I got the error but it works fine with the thin driver.
so where should I the information regard this.I'm working with oracle 8i.
with
raghu

while I'm using the oracle oci type driver I got the
error but it works fine with the thin driver.What is the error ?
so where should I the information regard this.I'm
working with oracle 8i.As long as you have the 8i client set up properly, the JDBC OCI drivers will work. To test just go to the command prompt and try tnsping and/or sqlplus to connect to your DB.
Post your JDBC URL and the exception you are getting if you are still having problems.

Memory leak using Oracle thin driver on wls6.1...

Hi, I've been attempting to find a memory leak in an application that
runs on WLS 6.1 SP2, on Solaris 8 and accessing an Oracle 9i db. We
are using the Type 4 (Thin) driver and JProbe reports that hundreds of
oracle.jdbc.* objects are left on the heap after my test case
completes. Specifically oracle.jdbc.ttc7.TTCItem is the most common
loiterer on the heap. I have verified that after each database access
the resources are release correctly (i.e. ResultSet, Connection,
PreparedStatement, etc.)
Has anyone encountered similar problems? or does anyone know how to
fix this?
Thanks,
Tim Watson

Hi Tim!
We have seen problem using oracle 817 client that has been resolved using
901 client for type2(oci) driver, But i am not aware of thin driver
problem. You should check with oracle if they have find any customer's
with this problem.
Thanks,
Mitesh
Tim Watson wrote:
Hi, I've been attempting to find a memory leak in an application that
runs on WLS 6.1 SP2, on Solaris 8 and accessing an Oracle 9i db. We
are using the Type 4 (Thin) driver and JProbe reports that hundreds of
oracle.jdbc.* objects are left on the heap after my test case
completes. Specifically oracle.jdbc.ttc7.TTCItem is the most common
loiterer on the heap. I have verified that after each database access
the resources are release correctly (i.e. ResultSet, Connection,
PreparedStatement, etc.)
Has anyone encountered similar problems? or does anyone know how to
fix this?
Thanks,
Tim Watson

Memory leakage with oracle oci driver

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