Useful fields to search on in MQ FDC files (First Failure Symptom Report)
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I was asked today if there is any document that describes the contents of the FDC files (First Failure Symptom Report) that are written by WebSphere MQ to record potentially important events. These files are for use by support to help research problems and different FDCs will contain different kinds of data and control blocks. This might change at any time depending on what the development team decides they would like to see for that particular event (Probe). Because of this, the content of the FDC files is not published. But looking at some fields in the FDC files can help you find issues without having to call support. In general, if you want to search on the contents of an FDC, the best search arguments are:
If you are familiar with the ffstsummary utility that ships with the product these fields are included in the output.
contents of ffstsummary file
AMQ31510.0.FDC 2012/03/05 16:28:13 amqzlaa0 31510 13 XC308010 xlsReleaseMutex xecL
AMQ5625.0.FDC 2012/03/05 18:29:35 amqzlaa0 5625 11 XC307070 xlsRequestMutex xecL
AMQ5735.0.FDC 2012/03/05 18:40:19 amqzlaa0 5735 13 XC308010 xlsReleaseMutex xecL
The FDC files are named for the process id (PID) of the process that wrote the FDC. The name will be in the format of AMQprocessid.0.FDC
One thing you can find in most FDCs are the Environment Variables set for this process if you search on 'Environment Variables:'
There is a great deal of other information but the content varies widely depending on the type of event the caused the FDC to be created.
See First Failure Support Technology (FFST) in the WebSphere MQ information center for more details.