[Wrapper-user] How to get a thread dump in a JVM freeze incident?

[Balaji KM <bal...@gm...>]

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.FixMarketDataMainProcess
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.