[AMQ-3997] Memory leak in activemq-pool

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.6.0
• Fix Version/s: 5.7.0
• Component/s: activemq-pool
• Labels: leak
• Patch Info: Patch Available
• Assignee: Gary Tully
• Reporter: Claus Ibsen
• Created: 28/Aug/12 10:22
• Updated: 30/Aug/12 08:58
• Resolved: 28/Aug/12 12:22

Description

The org.apache.activemq.pool.PooledConnectionFactory from activemq-pool has a severe memory leak when using it for sending a lot of messages. Over time this causes memory to be eaten up.

I have tracked it down to the following tickets:

• AMQ-3680, which keeps adding event listeners, despite previously added
• AMQ-2643, code which keep track of loaned sessions, causing JVM to create too many ConcurrentLinkedQueue$Node instances

There may be others. But with resolutions to those I can get the pool to not eat memory, and keep memory consumption low.