没有jstack的Java线程转储

Question

I need to monitor java thread status from command line(ubuntu server) to use with Icinga monitor. But i cannot use jps, jstack and jcmd commands since it's not allowed to have JDK installed in production server.

The process_id with ps command

# ps -ef| grep [s]tart.jar | cut -d' ' -f6
1201

But I am struggling to collect java thread dump. I have tried with kill -3 but couldn't get any output.

Is there any other alternative ways to collect java thread status from command line ?

Answer 1

I found the way to capture thread dump when executing kill -3 <pid> . I have added following options to JAVA_OPTIONS in jetty server which helps to records thread dump in specified location.

-XX:+UnlockDiagnosticVMOptions -XX:+LogVMOutput -XX:LogFile=/var/log/jetty9/threaddump.log

Now execution of kill -3 <pid> command records thread dump in threaddump.log which is used to know status of threads.