One of the boons of Java is its remote debugging support.. you can attach a profiler to a process when something like this happens, extract thread names & stack

One of the boons of Java is its remote debugging support.. you can attach a profiler to a process when something like this happens, extract thread names & stacks, and so on. AFAIK you can also use the Linux 'perf trace' command on a Java process, but probably there is some more setup involved.