Yes, I also tried jstack but getting the below error :
[root]# jstack 26076 >> /opt/jbosstrace.log
26076: Unable to open door: target process not responding or HotSpot VM not loaded
The -F option can be used when the target process is not responding
[root]# jstack -l 26076 >> /opt/jbosstrace.log
26076: Unable to open door: target process not responding or HotSpot VM not loaded
The -F option can be used when the target process is not responding
[root]# jstack -F 26076 >> /opt/jbosstrace.log
Attaching to process ID 26076, please wait...
Error attaching to process: Did not find libthread in target process/core!