RE: [Wrapper-user] How to get a thread dump in a JVM freeze incid ent?

[Stuijt, J. <JS...@gt...>]

You could have a look at JMX:
- in your app you start a JMX registry and a http service
- from a browser you can then connect to the http service and
  call a method from that is in the WrapperListener class.
  If you make available the method "threadDump()" then you can request
  A threaddump from your application.
  This will (of course) only work if your JVM is still "alive".

Google: "mx4j"

Good luck!

Met vriendelijke groet,
Johan Stuijt
Application Engineer
MES Expert Center
Doorkiesnummer: 075 612 79 34
 
GTI Industrie Noordwest bv
	Industrial Automation

	Houthavenkade 44  1506 PD Zaandam
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-----Oorspronkelijk bericht-----
Van: Balaji KM [mailto:bal...@gm...] 
Verzonden: dinsdag 21 september 2004 11:43
Aan: wra...@li...
Onderwerp: [Wrapper-user] How to get a thread dump in a JVM freeze incident?

Dear All,

	I'm using java service wrapper 3.1.0 in my application which runs on
IBM JRE 1.3.0. When the application freezes, we are tring to get
thread dump using wrapperlistener's "D" command. We couldn't succeed
in getting a thread dump;no response from the wrapper service. We
observed that service was in hung state. Even in case of a freeze
incident, how should I configure the wrapper service to get a thread
dump.

I have listed my app configurations as follows:

wrapper.java.command=C:/IBM/Java13/jre/bin/java 
wrapper.java.mainclass=com.elind.service.fixgateway.common.FixMarketDataMain
Process
wrapper.max_failed_invocations=1 
wrapper.ping.timeout=0
wrapper.java.classpath.1=C:/Test/lib/wrapper.jar
wrapper.java.classpath.2=C:/Test/lib/FixGateway.jar
wrapper.java.classpath.3=C:/Test/lib/jgl3.1.0.jar
wrapper.java.classpath.4=C:/Test/lib/xerces.jar
wrapper.java.classpath.5=C:/Test/lib/xmlparserv2.jar
wrapper.java.library.path.1=C:/Test/lib
wrapper.console.format=PM
wrapper.console.loglevel=INFO
wrapper.logfile=../logs/wrapper.log
wrapper.logfile.format=LPTM
wrapper.logfile.loglevel=INFO
wrapper.logfile.maxsize=0
wrapper.logfile.maxfiles=0
wrapper.syslog.loglevel=NONE
wrapper.ntservice.name=FixTradingPartner
wrapper.ntservice.displayname=FixTradingPartner
wrapper.ntservice.description=FixTradingPartner
wrapper.ntservice.dependency.1=
wrapper.ntservice.starttype=AUTO_START
wrapper.ntservice.interactive=false
wrapper.ntservice.console=false
wrapper.working.dir=C:/Test/batch

Awaiting for you valuable suggestions.

Thanks in advance,

Warm Regards,
Balaji K M.


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