Bug ID 640809: Merged constantly restarts

Last Modified: Dec 20, 2018

Bug Tracker

Affected Product:  See more info
BIG-IP Install/Upgrade, TMOS(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0

Opened: Jan 23, 2017
Severity: 3-Major
Related AskF5 Article:
K79892782

Symptoms

Merged constantly restarts. This may occur on upgrade or after merged restarts after enabling debug logging. The system logs the following error signature in /var/log/user.log: err merged[27984]: isc/libev evGetNext: Bad File Descriptor: 5, errno: 9 Bad file descriptor. notice logger: Started writing core file: /var/core/merged.bld0.0.249.core.gz for PID 27984.

Impact

Merged restarting may impact stats collection. This can also impact qkview generation, the statistics may be corrupt or missing, GUI might return "General database error retrieving information."

Conditions

log-config filter level is debug and merged restarts. Note: 'level debug' is the default for a log-config filter therefore the following would be debug logging: sys log-config filter myfilter { publisher mypub }

Workaround

If you are encountering this, you can run the following tmsh commands to set the log level to the warning level. Impact of procedure: This will disable debug logging of merged. tmsh modify sys log-config filter <HSL-Filter-Name> level warn tmsh save sys config

Fix Information

None

Behavior Change