IMS restart message enhancement

This enhancement is delivered with APAR/PTF PH01551/UI59302.

With this enhancement, at IMS normal or emergency restart, the first DFS5055I message is issued when the IMS system starts reading the log records. If IMS restart takes longer than 30 seconds, message DFS5055I is reissued every 30 seconds after the first DFS5055I message is issued. Message DFS5055I is issued a final time when the log read process is complete. If message DFS5055I is neither issued to indicate that the log read is completed nor is it issued at regular 30-second intervals, IMS restart is not making progress and might be hung.

DFS5055I RESTART LOG READ PASS n IS IN PROGRESS; LSN=lsn
DFS5055I RESTART LOG READ PASS n HAS COMPLETED: LSN=lsn

In the message text, n is the restart log read pass number, which is 1 for normal restart, or 1 or 2 for emergency restart, and lsn is the log sequence number.

Previously, because a message was not issued to indicate log read progress, it was difficult to determine whether IMS restart was in progress or hung when restart was taking a long time.

Changes to troubleshooting for IMS

For a complete list of all of the new, changed, and deleted messages, and abend codes in IMS 15.4, see Message and code changes in IMS 15.4.

Documentation changes

The following table lists the publications that contain new or changed topics for the IMS restart message enhancement. Publications that are not impacted by this enhancement are not included in the table.