Finding which process was killed by Linux OOM killer
Try this out:
grep -i 'killed process' /var/log/messages
Process gets Killed by Linux OS - No OOM Log in /var/log files
Assuming you are starting these JVM processes in the background, did you use nohup to make sure they ignore SIGHUP? Also it would be wise to redirect the output of these processes to the output files.
E.g.
nohup node server1.js >& server1.out &
And then you can investigate in those files for any possible messages if there are any.
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