Technote (troubleshooting)
Problem(Abstract)
You may deactivate a Coupling Facility (CF) via the HMC resulting in message IXC518I showing a reason "NOT CONNECTED TO SYSTEM" in the syslog. In spite of this the CF System Data for Sysplex workspace shows the Status for such Coupling Facility as 'Okay'
Diagnosing the problem
Look for following messages in the zOS syslog after Coupling Facility has been deactivated via the Hardware Management Console:
IXC5IXC518I 18I SYSTEM BP1D NOT USING 704
COUPLING FACILITY 002097.IBM.83.00000001D88A
PARTITION: 1D CPCID: 00
NAMED SD011D
REASON: NOT CONNECTED TO SYSTEM.
REASON FLAG: 13300004.
or
SYSTEM BP1D NOT USING 702
COUPLING FACILITY 002817.IBM.84.000000028A77
PARTITION: 02 CPCID: 00
NAMED BPC4C2
REASON: CONNECTIVITY LOST.
REASON FLAG: 13300002.
Then, verify that the column Status in Coupling Facility System Data for Sysplex TEP view shows 'Okay'.
Resolving the problem
LOSS CONN event that results from deactivating the CF does not drive a logical disconnect from the policy perspective.
Currently Omegamon XE for zOS looks at the logical view of the Policy and not at the physical view; according to this as the Coupling Facility is still active from a logical perspective the status is shown as okay.
Omegamon XE for zOS uses the IXCQUERY api to determine the CF status. The QUACFSTFAILED status flag is only set for a HW response from the CF that indicates the coupling facility is in the failed state, which an indication that the CF is still active, but something has happened to caused the CF to indicate it has failed indicating some sort of error in the CF code.
A physically deactivated couple facility cannot have connected lpars.
The indication for the case where the CF is deactivated is that the number of connected systems will be zero. In the TEP Coupling Facility System Data for Sysplex the 'Connected MVS System Count' will be 0.
To create a situation alerting on an inactive CF key on 'Connected MVS System Count' and not the 'Status' column in Coupling Facility System Data for Sysplex.
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