AAA, NAC, Guest Access & BYOD

CPPM Server Suddenly Unresponsive
Problem:

In some cases, we might come across that system may become unresponsive suddenly and the following message in seen in the CPPM logs:

Feb 25 07:40:26 CPPMVM1 kernel: [6373349.291483] swap_free: Unused swap offset entry 00000180
Feb 25 07:40:26 CPPMVM1 kernel: [6373349.291488] BUG: Bad page map in process snmpd pte:00030000 pmd:1a07c6067
Feb 25 07:40:26 CPPMVM1 kernel: [6373349.291566] addr:00007fa41d03e000 vm_flags:00100073 anon_vma:ffff88101126c800 mapping: (null) index:7fa41d03e
Feb 25 07:40:26 CPPMVM1 kernel: [6373349.291676] CPU: 1 PID: 9204 Comm: snmpd Tainted: G B -------------- 3.10.0-123.20.1.aruba.x86_64 #1
Feb 25 07:40:26 CPPMVM1 kernel: [6373349.291677] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 04/14/2014



Diagnostics:

When the System becomes sluggish, unresponsive or panics repeatedly and when above error messages are noticed in CPPM system logs(/var/log/messages), follow the below solution.



Solution

The above error message shows that there is a Bad page map issue for SNMPD. It could be with any other processes and mainly seen in a Virtual environment.

"swap_free: Unused swap offset entry"  message indicate that server warns itself about that it has hardware problems. It is most likely to be caused by a hardware errorRun memtest86, or other memory verification checks on the host.

For details about Memtest, please see - https://community.arubanetworks.com/t5/AAA-NAC-Guest-Access-BYOD/Run-Memtest-for-a-CPPM-VM-appliance/ta-p/290932

 

Note:

1. /var/log/messages cannot be exported to an external Syslog server.

2. To collect the logs, please navigate to Administration --> Server Manager --> Select the server and click Collect logs. After collecting the logs, we should untar the file and navigate to the folder System logs --> var --> log --> messages text file to check the logs manually. 

 

 

 

 

Version history
Revision #:
2 of 2
Last update:
‎03-25-2017 05:04 AM
Updated by:
 
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