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Cisco Bug: CSCvv04736 - Flood of PUBLISH from CUCM leads to PE memory peak and crash

Last Modified

Oct 16, 2020

Products (1)

  • Cisco Unified Communications Manager IM & Presence Service

Known Affected Releases

11.5(1)

Description (partial)

Symptom:
1) Presence Engine functionality stops working.
2) Request arriving at Presence Engine is only queued, and not processed.
3) Presence Engine logs are full of trace line -
         "ERROR event queue is queuing too many messages, will not queue more"
4) Perfmon shows VmSize of Process PE , steadily rising till max, and then plateau and eventually PE crash

Conditions:
This happens when IMP is overwhelmed with lots of SIP PUBLISH flooding in from CUCM.
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