[POOL-359] NullPointerException closing multiple GenericObjectPools

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.6.0
• Fix Version/s: 2.6.1
• Assignee: Unassigned
• Reporter: Michael Wintermeyer
• Created: 16/Nov/18 20:23
• Updated: 13/Mar/19 21:17
• Resolved: 22/Nov/18 16:46

Description

java.lang.NullPointerException
at org.apache.commons.pool2.impl.EvictionTimer.cancel(EvictionTimer.java:97)
at org.apache.commons.pool2.impl.BaseGenericObjectPool.startEvictor(BaseGenericObjectPool.java:753)
at org.apache.commons.pool2.impl.GenericObjectPool.close(GenericObjectPool.java:694)

Possible when multiple pools in the same process each call #close. GenericObjectPool#close checks #isClosed before proceeding, but that call checks a non-static instance variable. It calls into EvictionTimer#cancel which sets the static variable EvictionCache.executor to null.

Issue Links

• links to: GitHub Pull Request #17