IBM MQ for z/OS dumps
Use this topic for information about the use of dumps in problem determination. It describes the steps we should take when looking at a dump produced by an IBM MQ for z/OS address space.
How to use dumps for problem determination
When solving problems with the IBM MQ for z/OS system, we can use dumps in two ways:- To examine the way IBM MQ processes a request from an application program.
To do this, you typically need to analyze the whole dump, including control blocks and the internal trace.
- To identify problems with IBM MQ for z/OS itself, under the direction of IBM support center personnel.
Use the instructions in the following topics to get and process a dump:
- Getting a dump with IBM MQ for z/OS
- Use the z/OS DUMP command
- Processing a dump using the IBM MQ for z/OS dump display panels
- Processing an IBM MQ for z/OS dump using line mode IPCS
- Processing an IBM MQ for z/OS dump using IPCS in batch
The dump title might provide sufficient information in the abend and reason codes to resolve the problem. We can see the dump title in the console log, or by using the z/OS command DISPLAY DUMP,TITLE. The format of the dump title is explained in Analyzing the dump and interpreting dump titles on z/OS. For information about the IBM MQ for z/OS abend codes, see IBM MQ for z/OS abends, and abend reason codes are documented in IBM MQ for z/OS messages, completion, and reason codes.
If there is not enough information about your problem in the dump title, format the dump to display the other information contained in it.
See the following topics for information about different types of dumps:
- Getting a dump with IBM MQ for z/OS
Use this topic to understand the different dump types for IBM MQ for z/OS problem determination. - Use the z/OS DUMP command
To resolve a problem, IBM can ask you to create a dump file of the queue manager address space, channel initiator address space, or coupling facilities structures. Use this topic to understand the commands to create these dump files. - Processing a dump using the IBM MQ for z/OS dump display panels
We can use commands available through IPCS panels to process dumps. Use this topic to understand the IPCS options. - Processing an IBM MQ for z/OS dump using line mode IPCS
Use the IPCS commands to format a dump. - Processing an IBM MQ for z/OS dump using IPCS in batch
Use this topic to understand how IBM MQ for z/OS dumps can be formatted by IPCS commands in batch mode. - Analyzing the dump and interpreting dump titles on z/OS
Use this topic to understand how IBM MQ for z/OS dump titles are formatted, and how to analyze a dump. - SYSUDUMP information on z/OS
The z/OS system can create SYSUDUMPs, which can be used as part of problem determination. This topic shows a sample SYSUDUMP output and gives a reference to the tools for interpreting SYSUDUMPs. - Snap dumps on z/OS
Snap dump data sets are controlled by z/OS JCL command statements. Use this topic to understand the CSQSNAP DD statement. - SYS1.LOGREC information on z/OS
Use this topic to understand how the z/OS SYS1.LOGREC information can assist with problem determination. - SVC dumps on z/OS
Use this topic to understand how to suppress SVC dumps on z/OS, and reasons why SVC dumps are not produced.
Parent topic: Problem determination on z/OS
Related concepts
- Use trace for problem determination on z/OS
- IBM MQ for z/OS abends
- Diagnostic information produced on IBM MQ for z/OS