RHBA-2015:0737 - Bug Fix Advisory

Topic

Updated libqb packages that fix one bug are now available for Red Hat Enterprise
Linux 7.

Description

The libqb packages provide a library with the primary purpose of providing high
performance client server reusable features, such as high performance logging,
tracing, inter-process communication, and polling.

This update fixes the following bug:

• When using the Realtime (RT) priority, the Corosync Cluster Engine

unintendedly used 100% of the CPU capacity. The libqb library has been fixed to
handle RT priority without negatively affecting performance, and thus no longer
causes Corosync to use up all the CPU capacity in the described scenario.
(BZ#1198718)

Users of libqb are advised to upgrade to these updated packages, which fix this
bug.

Solution

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

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux High Availability for x86_64 7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.2 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Update Support 7.1 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 7 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.7 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.6 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.5 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.4 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.2 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Update Support 7.1 x86_64
• Red Hat Enterprise Linux High Availability (for RHEL Server) from RHUI 7 x86_64
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.7 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.6 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.4 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.3 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Update Services for SAP Solutions 7.2 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 - Extended Life Cycle Support 7 x86_64

Fixes

• BZ - 1198718 - libqb causes 100% cpu utilization in corosync when corosync uses realtime priority

CVEs

(none)

References

(none)