DSNJ004I ACTIVE LOG COPY n INACTIVE, LOG IN SINGLE MODE, ENDRBA=...

Explanation

This message is sent when the dual active logging option is selected and copy 'n' becomes inactive. A log copy becomes inactive when the next active log data set is not ready when required. ENDRBA is the last byte of log data written on copy 'n'. This is usually caused by a delay in off-load.

System action

The log is switched to single mode until the next data set for copy 'n' is ready for logging.

If Db2 is shut down or abends while in single mode with the ZPARM option still set for dual active data sets, the previous state of the active log data sets determines what happens when Db2 is started, as follows:
  • If fewer than two data sets are available (not flagged as STOPPED or REMOVAL PENDING) for each set of active logs, Db2 startup terminates and message DSNJ112E is issued.
  • If an active log data set is in NOTREUSABLE state, Db2 can be started in single logging mode, but dual mode takes effect when the other active log data set becomes available after offloading.

This message is non-scrollable. It remains highlighted on the console until you take the appropriate action.

Operator response

Execute an MVS Display System Requests command (D R,L for example) to ensure that there are no outstanding requests that are related to the log off-load process. Take the necessary action to satisfy any requests, and permit off-load to continue.

System programmer response

If the switch to single mode was caused by the lack of a resource required for off-load, the necessary resource should be made available to allow off-load to complete and thus permit dual logging to proceed. If recovery is required, information from this message might be required as input to the change log inventory (DSNJU003) utility.