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| memory leak about java node |
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Message
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| leo.yue |
 Posted: Sat Nov 27, 2004 4:26 am Post subject: memory leak about java node |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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Hi, all
I have a message flow including a java plugin node
When we do performance test, we found the memory size of DataFlowEngine increase very rapidly , and at last it generates coredump
I have to add "System.gc()" in my java node. after this, the memory size of DataFlowEngine is very stable, but performance is awful.
software version: MB 5.0.3
os: AIX
Could you help me ? Thanks a lot |
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| kirani |
| Posted: Sat Nov 27, 2004 2:23 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Have you looked at DataFlowEngine process memry size without your java plug-in node?
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
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IBM Cert. Specialist - WMQI, MQSeries
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| leo.yue |
| Posted: Sun Nov 28, 2004 12:20 am Post subject: |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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Yes. If it don't contain my java node, DataFlowEngine memory size is normal.
And I has tested a simplest java node, there still is this problem
This is a test java node:
| Code: |
public void evaluate(MbMessageAssembly assembly, MbInputTerminal inTerm) throws MbException {
MbMessage outMsg = null;
MbMessageAssembly outputAssembly = null;
MbOutputTerminal output = null;
try{
output = getOutputTerminal("out");
outMsg = new MbMessage(assembly.getMessage());
String strName = (String)(outMsg.getRootElement().getFirstElementByPath("/XML/Data/name").getValue());
MbElement IdElement = outMsg.getRootElement().getFirstElementByPath("/XML/Data/Id");
IdElement.setValue(strName);
IdElement = null;
strSN = null;
outputAssembly = new MbMessageAssembly(assembly, outMsg);
output.propagate(outputAssembly);
}finally{
outMsg.clearMessage();
outMsg = null;
outputAssembly = null;
output = null;
//System.gc();
}
} |
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| chenulu |
| Posted: Mon Nov 29, 2004 12:58 pm Post subject: |
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Voyager
Joined: 27 Mar 2002
Posts: 87
Location: Research Triangle Park, NC
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Hi Leo,
Try to clear the outMsg after every propagate. So, you code should look like:
output.propagate(outputAssembly);
outMsg.clearMessage ();
Also, explicitly calling the Java Garbage collection has a significant performance impact
-- Chenulu |
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| leo.yue |
| Posted: Tue Nov 30, 2004 7:24 am Post subject: |
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Acolyte
Joined: 20 Oct 2004
Posts: 52
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thx for you reply
I have cleared outMsg in finally block
And I know system.gc impact performance, but I have to free the increasing memory |
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| chenulu |
| Posted: Tue Nov 30, 2004 9:10 am Post subject: |
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Voyager
Joined: 27 Mar 2002
Posts: 87
Location: Research Triangle Park, NC
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Hi Leo,
Can you paste your plugin code in its entirity.
-- Chenulu |
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