[QPID-5513] HA backup fails if number of replicated queues exceeds number of channels.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.25
• Fix Version/s: 0.27
• Component/s: C++ Clustering
• Assignee: Alan Conway
• Reporter: Alan Conway
• Created: 24/Jan/14 19:37
• Updated: 03/Jun/14 15:35
• Resolved: 24/Jan/14 21:55

Description

HA uses a single link and a session per queue to replicate queue data. That means the number of replicated queues is limited by the number of channels, which is 32k in current Qpid.

To reproduce:

• create a 2 node cluster.
• declare 32769 queues

Actual Result:

• no error observed by the client declaring the queues or in the primary log.
• backup broker exits with a critical error saying "not enough channels"

In the short term it is not straightforward to remove the limit, however the error reporting needs to be fixed:

Desired result:

• client declaring the queues receives a "resource-limit-exceeded" exception with appropriate message.
• primary logs an error indicating we exceeded the replicated queue limit
• primary and backup broker continue to function normally.