Symptoms

Under high load, the following appears in the atlassian-jira.log:

2011-07-29 10:18:22,314 http-8080-10 ERROR anonymous 618x837773x5 a8n1rp 10.1.38.10 /secure/IssueNavigator.jspa[velocity] Runtime : ran out of parsers. Creating new. Please increment the parser.pool.size property. The current value is too small.

Cause

This is due to the velocimacro.library.autoreload property being set to true, and and the class.resource.loader.cache being disabled.

Resolution

In <JIRA-install>/atlassian-jira/WEB-INF/classes/velocity.properties:

1. Set the velocity velocimacro.library.autoreload property to false
2. Enable the class.resource.loader.cache