Obtaining diagnostic information

We can find diagnostic information about WebSphere MQ in the following places:

User's job log

The job log records the commands processed by the job and the messages returned from running those commands.

Reviewing the job log of a user who experiences a problem, by issuing the DSPJOBLOG command, identifies the WebSphere MQ commands issued and the sequence of those commands.

WebSphere MQ job log

WebSphere MQ specific jobs, for example, the command server and channel programs, run under the WebSphere MQ profile QMQM. If you have a problem in these areas, review these job logs by issuing the command

WRKSPLF QMQM to display them.

System history log

Reviewing the history log, by issuing the DSPLOG command, displays information about the operation of the system and system status. This can be useful for identifying channel connection problems.

OS/400 message queue

It is useful to view messages sent to various OS/400 message queues using the DSPMSG command. Use the command

DSPMSG QSYSOPR to check the system operator message queue, used for WebSphere MQ journaling messages, and job completion messages in particular.

Error logs in the IFS

See Error logs for further information on using the error logs generated.

Generation of FFSTs

See First-failure support technology (FFST) for further information on First Failure Support Technology and an example of a WebSphere MQ for iSeries FFST report.