Riverbed RiOS 9.0.0 / EX 3.6.0 Memory Leak Alert

Riverbed have informed us of a software defect in their RiOS 9.0.0 / EX 3.6.0 firmware.

We have recently discovered a P1 software defect, introduced in SteelHead software image versions RiOS 9.0.0 / EX 3.6.0.
If you have downloaded this software, we recommend you immediately take action by consulting the options below:

•    If you have not installed RiOS 9.0.0 / EX 3.6.0 software, please refrain from doing so.
•    If you have installed the impacted RiOS 9.0.0 / EX 3.6.0 version, please upgrade to version 9.0.0a / EX 3.6.0a during your next available maintenance window.
•    For more information on the impacted RiOS 9.0.0 / EX 3.6.0 software version, please review Knowledge base article S25867 or contact Riverbed Support.

Thank you for your patience and apologies for any inconvenience this may have caused.

Regards,
The Riverbed Support Team

Knowledge base article S25867

RIOS 9.0.0 and EX 3.6.0 mgmtd process memory leak causes SteelHead to become unresponsive or have Paging Alarms
Categories: SteelHead
Solution Number: S25867      

Issue

RIOS 9.0.0 and EX 3.6.0 has a memory leak in mgmtd process that causes SteelHead to become unresponsive or frozen due very low memory conditions and excessive swap memory paging. This only occurs when SSL optimization is enabled.

Symptoms of this memory leak may be:

• CLI and Web GUI access may be slow or limited with CLI message:

              % Management back end unavailable. Continuing with reduced functionality

•     SteelHead status may become 'Degraded' due to excessive paging:

              Alarm 'paging' triggering

Solution

This issue is being tracked in Bug 225347 and fix will be included in next release of  RIOS 9.0.0a/9.0.1 and EX 3.6.0a and 3.6.1.

To stabilize and prevent this problem occurring again on SteelHead restart mgmtd process from CLI and disable certs_expiring alarm
(or disable SSL optimization). 

Note: These commands don't need Service restart and can be executed at any time.


To restart mgmtd process:
SH (config) # conf t
SH (config) # pm process mgmtd restart

(will loose access to CLI until mgmtd starts, connect again in few minutes)

To disable certs_expiring alarm:
SH (config) # no alarm certs_expiring enable
SH (config) # wr mem
 
Environment: RIOS 9.0.0/EX 3.6.0

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