Summary

The instance may crash, become slow, or become unresponsive.

The following entries can be found in the atlassian-jira.log:

Java HotSpot(TM) 64-Bit Server VM warning: CodeCache is full. Compiler has been disabled.
Java HotSpot(TM) 64-Bit Server VM warning: Try increasing the code cache size using -XX:ReservedCodeCacheSize=

PS: An instance might still be impacted by this issue even when the above error is not present in the logs.

The following appears on the thread dumps where the compiler threads would be in the runnable state and consuming CPU.

"C2 CompilerThread0" #6 daemon prio=5 tid=0x000000001ab9c000 nid=0xcfc runnable [0x0000000000000000]
   java.lang.Thread.State: RUNNABLE

Environment

All versions of Jira (Server and Data Center)

Cause

This issue is rare but it can occasionally happen when the Java CodeCache becomes full.

Resolution

1. Add the following arguments to the Java startup options by following the instructions on Setting Properties and Options on Startup:

   -XX:ReservedCodeCacheSize=512m

2. Clear catalina.out log file under <JIRA_INSTALL>/logs directory because the health check may be responding to outdated messages in catalina.out.
   

3. Restart the application for the new settings to take effect.