2000428 - ICM randomly not running with trace file filled by repeated log "no more free event-flags"

Symptom

ICM status randomly shows "not running" (red light) via SMICM and back to "running" after a refresh.

ICM trace file dev_icm was filled by below entries:

[Thr 139715372201728] *** ERROR => no more free event-flags. [mpixx_mt.c 5787]
[Thr 139715372201728] MpiIEvtOpen: retry with next key

The issue usually occurs on system peak wrokload period and users report that they are not able to connect to the ICM.

Environment

Issue happens on Oracle Linux 6.x

Keywords

no more free event-flags, retry with next key, ICM, not running, Oracle Linux 6.x, /etc/sysctl.conf , KBA , BC-CST-IC , Internet Communication Manager , Problem

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