Bug ID 672250: SessionDB update from ApmD with large volume fails

Last Modified: Oct 08, 2018

Bug Tracker

Affected Product:  See more info
BIG-IP APM(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, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Fixed In:
13.1.0, 12.1.3.4

Opened: Jul 03, 2017
Severity: 3-Major

Symptoms

While writing large amounts of data to sessionDB using memcache API, the write operation fails with partial write.

Impact

All worker threads performing authentication eventually get locked down. Session watchdog thread eventually makes a forced abort to recover from the situation. ApmD restarts in this situation.

Conditions

Large volumes data writing to SessionDB via memcache API.

Workaround

Control write to sessionDB with a smaller data size.

Fix Information

Partial write failure has been fixed, by writing remaining part(s) of query results in several iteration(s), until entire result is written.

Behavior Change