MIMQ0508W Missed heartbeat message

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Article ID: 127858

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Updated On:

Products

CA CIS CA Common Services for z/OS CA 90s Services CA Database Management Solutions for DB2 for z/OS CA Common Product Services Component CA Common Services CA Datacom/AD CA ecoMeter Server Component FOC CA Easytrieve Report Generator for Common Services CA Infocai Maintenance CA IPC Unicenter CA-JCLCheck Common Component CA Mainframe VM Product Manager CA Chorus Software Manager CA On Demand Portal CA Service Desk Manager - Unified Self Service CA PAM Client for Linux for zSeries CA Mainframe Connector for Linux on System z CA Graphical Management Interface CA Web Administrator for Top Secret CA CA- Xpertware CA Compress Data Compression for MVS CA Compress Data Compression for Fujitsu

Issue/Introduction

Noticing a large number of MIMQ0508W messages being issued recursively on a couple of systems.  

Example:  MIMQ0508W Missed heartbeat message from system TSTA 

In general, these MIMQUERY heartbeat messages are not a problem if noticed on occasion. However, if  they are being generated at a high frequency rate the cause needs to be determined.

Cause

The MIMQUERY heartbeat process is not getting back a response within it's expected time frame. This time frame is not configurable.

Environment

CA MIM MIMQUERY
CA Common Services CCITCPGW connectivity between LPARS

Resolution

Bump the CCITCPGW|CCISSLGW task to a higher service class than MIMQUERY to resolve the high frequency of the heartbeat messages. General rule of thumb is that the CCI task should be in an equal or higher service class than any address space it is providing a service for.