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

Question

I am trying to start a server using jre 10.0.1 64 bit. There is an obvious change in the settings for the JVM in windows start batch files. With the setting of -XX:+UseParNewGC as the reference point of the error what would this need to be changed to in order to get a JVM server start with java 10 versus the java 8 settings I have shown?

The line of code causing the error reference is:

set JAVA_PARAMETERS=-XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:+CMSClassUnloadingEnabled -XX:ParallelGCThreads=2 -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=10

score 28 · Answer 1 · edited Apr 23 '18 at 07:58

28

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.

edited Apr 23 '18 at 07:58

Alan Bateman

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answered Apr 22 '18 at 05:39

Peter Lawrey

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The flag was removed, but not the collector. ParNew is the default collector for young generation when CMS is selected. – apangin Apr 22 '18 at 10:13

kometen · Accepted Answer · 2021-11-29T07:41:18.803

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As a follow up to Peter's answer the flag is

-XX:+UseG1GC

as described at Oracle

edited Nov 29 '21 at 07:41

answered Jun 19 '18 at 12:36

kometen

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Thanks for pointing this out I am sure I am not the first to bring this topic up. – Javacodeman113 Jun 21 '18 at 18:32

score 7 · Answer 3 · answered Apr 29 '20 at 09:32

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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"

answered Apr 29 '20 at 09:32

Sahil Rajput

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your answer worked like charm. I also need to comment other ES_GC_OPTS in that if block also – Vishvajeet Ramanuj May 11 '21 at 12:41
not work I got error for next line and also comment all other line but elastic search is not staring – Bhavesh Prajapati Feb 12 '23 at 14:50

score 1 · Answer 4 · answered May 03 '21 at 08:45

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I was facing same issue by running below command it gets resolved

set JAVA_PARAMETERS=-XX:+UseG1GC

answered May 03 '21 at 08:45

Shubham Shah

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score 0 · Answer 5 · answered Mar 04 '21 at 10:12

0

Use -XX:+UseConcMarkSweepGC if you do want to use CMS.

answered Mar 04 '21 at 10:12

stackoverflowed

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

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