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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » evaluateXPath() in Java Compute node causing EG to restart

evaluateXPath() in Java Compute node causing EG to restart

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deepak_paul

Posted: Tue Mar 12, 2013 10:46 am Post subject: evaluateXPath() in Java Compute node causing EG to restart

Centurion

Joined: 04 Oct 2008
Posts: 147
Location: US

All,

I have a scenario where I have to populate the XPath expression dynamically and execute that Xpath in Java Compute node using evaluateXpath() method. For some reason, our population of XPath expression fails to generate the right value and results in null. And when this null value gets evaluated against the message(XML) as below, the execution group gets shut down and restarted immediately. Even the abend file does not have enough information why this

Code:

Try{
String xpath = <some dynamic processing logic>; --resulted null in a scenario.
inputXMLMsg.evaluateXPath(xpath);
}catch(Throwable e){
--logic to handle exception
}

Abend file content:

Quote:

----------------------------- Stack dump for current thread ( 1

/opt/app/ibm/mqsi/7.0/lib/libCommonServices.so[0x2b628be5d80c]
/opt/app/ibm/mqsi/7.0/lib/libCommonServices.so(_ZN8ImbAbend23dumpCurrentStacksToFileEPKvi+0x106)[0x2b628bcb6c06]
/opt/app/ibm/mqsi/7.0/lib/libCommonServices.so(_ZN8ImbAbend10dumpToFileEPcPKciS2_RKNS_6InsertES5_S5_S5_S5_S5_PKv+0x72f)[0x2b628bcb7c8f]
/opt/app/ibm/mqsi/7.0/lib/libCommonServices.so(_ZN8ImbAbend22logSystemErrorInternalEPKciS1_RKNS_6InsertES4_S4_S4_S4_S4_PKvb+0x25e)[0x2b628bcb82de]
/opt/app/ibm/mqsi/7.0/lib/libCommonServices.so(_ZN8ImbAbend41logSystemErrorAndTerminateProcessInternalEPKciS1_RKNS_6InsertES4_S4_S4_S4_S4_PKvb+0xae)[0x2b628bcb8c8e]
/opt/app/ibm/mqsi/7.0/lib/libCommonServices.so(_ZN8ImbAbend21signalHandlerInternalEiP7siginfoPv+0xf5)[0x2b628bcb8e65]
/lib64/libpthread.so.0[0x300060ebe0]
/opt/app/ibm/wtx/java/lib/amd64/default/libj9vm24.so[0x2aaaacc53b32]

I would like to know why this(null parameter to evaluateXPath() method) is not raising any exception but causing the EG to shut down and restart. Any help is appreciated.
_________________
Regards
Paul

mqjeff

Posted: Tue Mar 12, 2013 10:48 am Post subject:

Grand Master

Joined: 25 Jun 2008
Posts: 17447

It's causing an EG restart because of the reason listed in the abend files.

It's clearly a bug in the product itself.

You'll have to resolve that through a PMR.

But odds are very good that you're at 7.0.0.0 instead of 7.0.0.5 or later.

deepak_paul

Posted: Tue Mar 12, 2013 11:52 am Post subject:

Centurion

Joined: 04 Oct 2008
Posts: 147
Location: US

Thanks or your reply, mqjeff. But how you guessed that i am at 7.0.0.0?. In fact, this behavior was noticed in 7.0.0.4.

And i dont see any entry in the FIX list saying that this is fixed in 7.0.0.5.

http://www-01.ibm.com/support/docview.wss?&uid=swg27019145
_________________
Regards
Paul

McueMart

Posted: Tue Mar 12, 2013 2:10 pm Post subject:

Chevalier

Joined: 29 Nov 2011
Posts: 490
Location: UK...somewhere

Upgrade to 7.0.0.5 and test it - if it still abends raise the PMR. For the time being add some code in to protect against the null!

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