MIMQ0508W Missed heartbeat message

Products

• CIS
• COMMON SERVICES FOR Z/OS
• 90S SERVICES
• DATABASE MANAGEMENT SOLUTIONS FOR DB2 FOR Z/OS
• COMMON PRODUCT SERVICES COMPONENT
• Common Services
• Datacom/AD
• CA ECOMETER SERVER COMPONENT FOC
• Easytrieve Report Generator for Common Services
• INFOCAI MAINTENANCE
• IPC
• UNICENTER JCLCHECK COMMON COMPONENT
• Mainframe VM Product Manager
• CHORUS SOFTWARE MANAGER
• CA ON DEMAND PORTAL
• CA Service Desk Manager - Unified Self Service
• PAM CLIENT FOR LINUX ON MAINFRAME
• MAINFRAME CONNECTOR FOR LINUX ON MAINFRAME
• GRAPHICAL MANAGEMENT INTERFACE
• WEB ADMINISTRATOR FOR TOP SECRET
• Xpertware
• Compress Data Compression for MVS
• 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.

Environment

CA MIM MIMQUERY
CA Common Services CCITCPGW connectivity between LPARS

Cause

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

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.