I just upgraded a VM from 5.0 to 5.2 and now can't start the service. I see this error at the command line after running "service elasticsearch start":
"If the number of processes is expected to increase from one, then you should configure the number of GC threads appropriately using -XX:ParallelGCThreads=n"
I had previously had similar issues when I went from 2.4 to 5.0 as detailed in this post:
What do I need to address this particular issue? Do I need to make an update to the /etc/elasticsearch/jvm.options file? If so, what changes should be made? Any help would be appreciated. Thanks.