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yum install java-11-openjdk-devel

Instructions

1. Find Collect out the PID of the Content Gateway process by running this command

   Code Block
   PID=$(ps aux | grep [c]loudgateway.pid | awk '{ print $2 }')

2. Capture the thread dump using jstack and the open file descriptors using lsof by running these commands using the PID determined at step 1

   Code Block
   jstack $PID > thread_dump.txt lsof -p $PID > lsof.txt

3. If the above command does not capture anything, try running this to force a thread dump from a non-responsive process:

   Code Block
   jstack -F $PID > thread_dump.txt

4. If you are using JDK 11+, forcing a thread dump requires this command

   Code Block
   jhsdb jstack --locks --pid $PID > thread_dump.txt

5. Repeat the jstack/lsof commands 3 times total a few seconds apart like this:

   Code Block
   for i in $(seq 3); do jstack $PID > thread_dump-$i.txt; lsof -p $PID > lsof-$i.txt; sleep 60;done

   or ( for JDK 8 )

   Code Block
   for i in $(seq 3); do jstack -F $PID > thread_dump-$i.txt; lsof -p $PID > lsof-$i.txt; sleep 60;done

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