Garbage Collection Log Settings for Jira when using Java Version 11

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Platform Notice: Server and Data Center Only - This article only applies to Atlassian products on the server and data center platforms.

Problem

Trying to run JIRA leads to errors like

-XX:+PrintGCDateStamps --> Unrecognized VM option 'PrintGCDateStamps'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

Diagnosis

Environment

  • AdoptOpen JDK 11 

Cause

Starting with JIRA 8.2 we are supporting Java 8 and Java 11. There are significant differences in the Garbage Collection Log Settings between these 2 versions. Trying to run JIRA on Java 11 with the old settings will lead to errors like mentioned above.

See 43 GC logging flags removed from Java 9 for more details.

When migrating from a setup with Java 8 to another with Java 11 the Javaflags have been taken over.

Resolution

The following Java flags are no longer supported in Java 9 and upwards, as the Unified JVM Logging has been introduced


-XX:+PrintGCDetails
-XX:+PrintGCDateStamps
-XX:+PrintGCTimeStamps
-XX:+PrintGCCause
-XX:+UseGCLogFileRotation
-XX:NumberOfGCLogFiles=5
-XX:GCLogFileSize=20M
-Xloggc:<PATH_TO_GC_LOGS>

You must remove these flags when running JIRA with Java 11, otherwise JIRA will fail to start. Make sure to add the one below to keep logging GC activity.

-Xlog:gc*:file=<PATH_TO_GC_LOGS>:time,uptime:filecount=5,filesize=20M


Update: Failed to recognize file format in GCViewer

If you are analyzing the GC logs on GCViewer, you might run into this error :

Caused by: java.io.IOException: Failed to recognize file format.


This is due to  JRASERVER-71420 - Getting issue details... STATUS . To work this around add tags and level to the configuration :

-Xlog:gc*:file=<PATH_TO_GC_LOGS>:tags,time,uptime,level:filecount=5,filesize=20M


DescriptionChange of GC log parameters with Java 11
ProductJIRA



Last modified on Aug 10, 2020

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