Example recovery scenarios
This chapter describes procedures for recovering WebSphere MQ after various error conditions. These error conditions are grouped in the following categories:
Table 5. Example recovery scenarios Problem category Problem Where to look next Shared queue problems Queue both private and shared. Shared queue problems Active log problems
- Dual logging is lost.
- Active log has stopped.
- One or both copies of the active log data set are damaged.
- Write errors on active log data set.
- Active log is becoming full or is full.
- Read errors on active log data set.
Active log problems Archive log problems
- Insufficient DASD space to complete off-loading active log data sets.
- Off-load task has terminated abnormally.
- Archive data set allocation problem.
- Read I/O errors on the archive data set during restart.
Archive log problems BSDS problems
- Error opening BSDS.
- Log content does not correspond with BSDS information.
- Both copies of the BSDS are damaged.
- Unequal time stamps.
- Dual BSDS data sets are out of synchronization.
- I/O error on BSDS.
BSDS problems Page set problems
- Page set full.
- A page set has an I/O error.
Page set problems Coupling Facility and DB2 problems
- Storage medium full.
- DB2 system fails.
- DB2 data-sharing group fails.
- DB2 and the Coupling Facility fail.
Coupling Facility and DB2 problems Unit of work problems A long-running unit of work is encountered. Problems with long-running units of work IMS problems
- An IMS application terminates abnormally.
- The IMS adapter cannot connect to WebSphere MQ.
- IMS not operational.
IMS-related problems