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Date: Thu, 30 Jun 2011 14:05:28 +0000 (UTC)
From: "Kathey Marsden (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
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Subject: [jira] [Commented] (DERBY-4200) client side OutOfMemoryError
 running derbnetclientmats:jdbcapi/derbyStress
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    [ https://issues.apache.org/jira/browse/DERBY-4200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13057832#comment-13057832 ] 

Kathey Marsden commented on DERBY-4200:
---------------------------------------

Yes if I make each one of the strings slightly different IBM also fails after about 200 instantiations.
$ java -Xmx16M -cp . GCWontWait
i = 0
i = 100
i = 200
JVMDUMP006I Processing dump event "systhrow", detail "java/lang/OutOfMemoryError
" - please wait.


> client side OutOfMemoryError running derbnetclientmats:jdbcapi/derbyStress
> --------------------------------------------------------------------------
>
>                 Key: DERBY-4200
>                 URL: https://issues.apache.org/jira/browse/DERBY-4200
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.5.2.0
>         Environment: java version "1.5.0"
> Java(TM) 2 Runtime Environment, Standard Edition (build pxi32devifx-20070806 (SR5a))
> IBM J9 VM (build 2.3, J2RE 1.5.0 IBM J9 2.3 Linux x86-32 j9vmxi3223-20070426 (JIT enabled)
> J9VM - 20070420_12448_lHdSMR
> JIT  - 20070419_1806_r8
> GC   - 200704_19)
> JCL  - 20070725
> SUSE linux running on vmware.
>            Reporter: Kathey Marsden
>            Assignee: Mamta A. Satoor
>         Attachments: heapdump.20090428.084024.25679.phd, javacore.20090428.084024.25679.txt, vmware10_5_SR10HeapDump.phd, vmware10_5_SR7HeapDump.phd, windows10_5_HeapDump.phd
>
>
> On the nightly run for 4/27 - 10.5.1.2 - (769232), I saw client jdbcapi/derbystress.java  run out of heap space.   The test has not failed like this before on the same machine with the same JVM, and the one checkin on that day DERBY-3991 could not account for this failure.
> I will attach the javacore and heapdump.  Taking a quick look at the heap dump, it seems to have a lot of client side Statement objects, which seems to be just the leak the test is checking for.  Note: the test runs with 64MB heap.  It would be interesting to run with other jvms and force a gc() and a heap dump at this point in the test and see if we still have a lot of Statement objects or if this is a specific platform/JVM issue.
> The trace at the time of failure was :
> 1XMCURTHDINFO  Current Thread Details
> NULL           ----------------------
> 3XMTHREADINFO      "main" (TID:0x0808D300, sys_thread_t:0x0805CBC8, state:R, native ID:0x0000644F) prio=5
> 4XESTACKTRACE          at org/apache/derby/client/am/Cursor.allocateCharBuffer(Bytecode PC:77(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/NetStatementReply.parseSQLDTARDarray(Bytecode PC:77(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/NetStatementReply.parseQRYDSC(Bytecode PC:10(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/NetStatementReply.parseOpenQuery(Bytecode PC:104(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/NetStatementReply.parseOPNQRYreply(Bytecode PC:14(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/NetStatementReply.readOpenQuery(Bytecode PC:6(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/StatementReply.readOpenQuery(Bytecode PC:7(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/net/NetStatement.readOpenQuery_(Bytecode PC:11(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/am/Statement.readOpenQuery(Bytecode PC:6(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/am/Statement.flowExecute(Bytecode PC:581(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/am/Statement.executeQueryX(Bytecode PC:3(Compiled Code))
> 4XESTACKTRACE          at org/apache/derby/client/am/Statement.executeQuery(Bytecode PC:3(Compiled Code))
> 4XESTACKTRACE          at org/apache/derbyTesting/functionTests/tests/jdbcapi/derbyStress.testDerby3316(derbyStress.java:156)
> 4XESTACKTRACE          at org/apache/derbyTesting/functionTests/tests/jdbcapi/derbyStress.main(derbyStress.java:57(Compiled Code))

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