EHC ❯ NPE when shutting down Cache while still using it

• Type: Bug
• Status: Closed
• Priority:
• Resolution: Fixed
• Component/s:
• Labels:

• Assignee: drb
• Reporter: sourceforgetracker
• Created: September 21, 2009
• Votes: 0
• Watchers: 0
• Updated:

  September 22, 2009
• Resolved:

  September 22, 2009

Description

I think that you have a concurrency bug in net.sh.ehcache.Cache linked to the memory store.

The method Cache.put() can be executed while the method Cache.dispose() is beeing executed by another Thread.

Example:

Thread 1: call Cache.put() Thread 2: call Cache.dispose() At this point, the execution of Cache.dispose() finished, then memoryStore = null. Thread 1: Cache.put() continues its execution and try to add the element to the memory store (memoryStore.put(element);) => the method crashed with a NullPointerException because the Cache a set to null the memory store.

We experienced this problem in our production environment using EhCache 1.2.4 and this problem looks still present in 1.5. Sourceforge Ticket ID: 2740073 - Opened By: lgrangier - 7 Apr 2009 08:25 UTC

Comments

Fiona OShea 2009-09-22

Re-opening so that I can properly close out these issues and have correct Resolution status in Jira