RHBA-2016:2921 - Bug Fix Advisory

Topic

Updated Red Hat Enterprise MRG Messaging 3.2 packages are now available for Red Hat Enterprise Linux 6.

Description

Red Hat Enterprise MRG is a next-generation IT infrastructure incorporating
Messaging, Realtime, and Grid functionality. It offers increased performance,
reliability, interoperability, and faster computing for enterprise customers.

MRG Messaging is a high-speed reliable messaging distribution for Linux based on
AMQP (Advanced Message Queuing Protocol), an open protocol standard for
enterprise messaging that is designed to make mission critical messaging widely
available as a standard service, and to make enterprise messaging interoperable
across platforms, programming languages, and vendors.

MRG Messaging includes an AMQP messaging broker, AMQP client libraries for C++,
Java JMS, and Python, as well as persistence libraries and management tools.

These updated packages for Red Hat Enterprise Linux 6 include a fix for Bug 1396281.

It was found that if a dynamic route is created between two brokers, and there are two consumers, both subscribed to the same queue via x-bindings such that the queue will be deleted upon exit, and both consumers exit, the first broker does not delete the binding. This can cause unexpected problems if a consumer then tries to send messages to the still-existing binding, as the binding is no longer connected to the expected queue. The code has been fixed so that the bindings are deleted as expected on both brokers when two consumers create then delete the same queue.

Users of Red Hat Enterprise MRG Messaging 3.2 on Red Hat Enterprise Linux 6 are advised to upgrade to these updated packages.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/site/articles/11258

Affected Products

• Red Hat Enterprise MRG Messaging 3 x86_64
• Red Hat Enterprise MRG Messaging 3 i386

Fixes

• BZ - 1396281 - source broker of dynamic route doesnt delete bindings after two consumers of same queue bound to dest.broker are gone

CVEs

(none)

References

• https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_MRG/3/html/3.2_MRG_Messaging_Release_Notes/index.html