[LOG4J2-1235] org.apache.logging.log4j.core.appender.routing.IdlePurgePolicy not working correctly

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.5
• Fix Version/s: 2.7
• Component/s: Appenders
• Assignee: Gary D. Gregory
• Reporter: Niranjan Rao
• Created: 29/Dec/15 22:48
• Updated: 10/Nov/16 08:35
• Resolved: 29/Aug/16 18:40

Description

There is a problem in the function org.apache.logging.log4j.core.appender.routing.IdlePurgePolicy.scheduleNext().

I got out of file handles errors despite of setting IdlePurgePolicy. I did some digging I believe following is the cause

If the createTime is Long.MAX_VALUE, task is never scheduled. However function org.apache.logging.log4j.core.appender.routing.IdlePurgePolicy.update(String, LogEvent) checks if the future is not null before deciding to schedule.

After appendersUsage becomes empty first time, appenders keep piling up.

I believe fix will be to set future to null in the function scheduleNext in the else part of the condition where it checks for createTime

Issue Links

• links to: GitHub Pull Request #30