Troubleshooting Weblogic server hung issue

Thread dumps are critical for root cause analysis and are often required to effectively resolve application issues. At times of application problems, thread dumps need to be collected at least 3~5 times with 10~15 second interval. Create a convenient script to generate thread dumps from the JVM running WLS server. The following script is a working example and can be further customized to fit specific needs. Run the script to take thread dumps before shutting down the WLS server instance at times of problems.

#! /usr/bin/ksh

# This shell scripts takes a pid and kill -3 the pid to take thread dump.

if [[ 1 != $# ]]

then

echo "Usage: $0 "

exit 1

fi

let j=1

# The loop controls the number of times thread dumps are taken

while [[ $j -le 5 ]]

do

echo kill -3 $1

kill -3 $1

# take a small pause before getting the next thread dump

sleep 15

let j=$j+1

done