WebSphere MQ for z/OS abends

WebSphere MQ for z/OS uses two system abend completion codes, X'5C6' and X'6C6'. These codes identify:

X'5C6'
An X'5C6' abend completion code indicates that WebSphere MQ has detected an internal error and has terminated an internal task (TCB) or a user-connected task abnormally. Errors associated with a X'5C6' abend completion code might be preceded by a z/OS system code, or by internal errors.

Examine the diagnostic material generated by the X'5C6' abend to determine the source of the error that actually resulted in a subsequent task or subsystem termination.

X'6C6'
An X'6C6' abend completion code indicates that WebSphere MQ has detected a severe error and has terminated the queue manager abnormally. When a X'6C6' is issued, WebSphere MQ has determined that continued operation could result in the loss of data integrity. Errors associated with a X'6C6' abend completion code might be preceded by a z/OS system error, one or more X'5C6' abend completion codes, or by error message CSQV086E indicating abnormal termination of WebSphere MQ.

Table 4 summarizes the actions and diagnostic information available to WebSphere MQ for z/OS when these abend completion codes are issued. Different pieces of this information are relevant in different error situations. The information produced for a given error depends upon the specific problem. The z/OS services that provide diagnostic information are discussed in WebSphere MQ for z/OS diagnostic information.

Table 4. Abend completion codes
X'5C6' X'6C6'
Explanation
  • Error during WebSphere MQ normal operation
  • Severe error; continued operation might jeopardize data integrity
System action
  • Internal WebSphere MQ task is abended
  • Connected user task is abended
  • The entire WebSphere MQ subsystem is abended
  • User task with an active WebSphere MQ connection might be abnormally terminated with a X'6C6' code
  • Possible MEMTERM (memory termination) of connected allied address space
Diagnostic information
  • SVC dump
  • SYS1.LOGREC entry
  • VRA data entries
  • SYS1.LOGREC
  • VRA data entries
Associated reason codes
  • WebSphere MQ abend reason code
  • Associated z/OS system codes
  • Subsystem termination reason code
  • z/OS system completion codes and X'5C6' codes that precede the X'6C6' abend
Location of accompanying codes
  • SVC dump title
  • Message CSQW050I
  • Register 15 of SDWA section 'General Purpose Registers at Time of Error'
  • SYS1.LOGREC entries
  • VRA data entries
  • SYS1.LOGREC
  • VRA data entries
  • Message CSQV086E, which is sent to z/OS system operator