Insufficient DASD space to complete off-load processing

Symptoms
While off-loading the active log data sets to DASD, the process terminates unexpectedly. WebSphere MQ issues the following message:
CSQJ128E +CSQ1 LOG OFF-LOAD TASK FAILED FOR ACTIVE LOG nnnnn

The error is preceded by z/OS messages IEC030I, IEC031I, or IEC032I.

System action
WebSphere MQ de-allocates the data set on which the error occurred. If WebSphere MQ is running in dual archive mode, WebSphere MQ changes to single archive mode and continues the off-load. If the off-load cannot be completed in single archive mode, the active log data sets cannot be off-loaded, and the state of the active log data sets remains NOT REUSABLE. Another attempt to off-load the RBA range of the abandoned active log data sets is made the next time the off-load process is triggered.
System programmer action
Quiesce the queue manager (using the WebSphere MQ command STOP QMGR MODE(QUIESCE)) to restrict logging activity until the z/OS abend is resolved.

The most likely causes of these symptoms are:

Operator action
None.