Unrecognized VM option 'UseParNewGC' , Error: Could not create the Java Virtual Machine

This collectors was deprecated in JDK 9 and removed in JDK 10.

https://bugs.openjdk.java.net/browse/JDK-8151084

The new default is the G1 collector and I suggest you see if that suits your needs.

A follow up to Peter's answer, the flag is

-XX:+UseG1GC

as described at Oracle

I was getting the same error in elasticsearch. So the best way to resolve it is.

Run

sudo nano /usr/share/elasticsearch/bin/elasticsearch.in.sh

and comment out that VM arg

#ES_GC_OPTS="$ES_GC_OPTS -XX:+UseParNewGC"

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