[QPID-8144] [Broker-J] Memory compaction does not run when used direct memory exceeds 2GB

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: qpid-java-broker-7.0.2, qpid-java-6.0.7, qpid-java-6.1.3, qpid-java-6.0.8, qpid-java-broker-7.0.0, qpid-java-6.1.5, qpid-java-broker-7.0.1
• Fix Version/s: qpid-java-6.1.6, qpid-java-broker-7.0.3
• Component/s: Broker-J
• Assignee: Keith Wall
• Reporter: Keith Wall
• Created: 29/Mar/18 15:13
• Updated: 13/Mar/20 19:02
• Resolved: 30/Mar/18 11:35

Description

The Broker-J uses direct memory for the caching of message content and IO buffers used for AMQP messaging. If direct memory utilisation exceeds 2GB, owing to a defect the memory compaction mechanism does not get triggered. This problem may lead to an OutOfMemoryError: direct condition. Whether this condition manifests will depend on the message consumption patten - if the consumption pattern leads to sparsely occupied buffers (as might be occur with the use of the selectors so that some messages remain on the queue, for instance) the problem will occur.

A Broker restart will be required to restore service.