[
https://issues.apache.org/jira/browse/DERBY-4200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768422#action_12768422
]
Mamta A. Satoor commented on DERBY-4200:
----------------------------------------
I was able to get hold of IBM1.5 SR10 on both my windows XP laptop and on the
vmware machine and in both places, the behavior stayed the same which is no OOM
problems on windows XP but intermittent OOMs on vmware continued. Whenever we
ran into OOM on vmware, it would be close to after 900 to 1000 iterations of
ResultSet rs = s.executeQuery("SELECT * from tab"); that we would get OOM. And
the number of NetStatement objects in the heapdumps consistently is over 900+
when we run into OOM.
I will wait to hear what community thinks of these experiments. It definitely
appears to be specific to this vmware platform which has single processor.
> 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))
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
