Log Forwarder fails to warm start with the error message HBOB003E

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The Log Forwarder fails to warm start with the error message HBOB003E saying the z/OS® Log Forwarder cannot read progress information in the persistent_values.dat file.

Symptom

The Log Forwarder fails to warm start with the following error message: 
HBOB003E The z/OS Log Forwarder cannot read progress information in the file with path name 
/usr/lpp/IBM/zscala/persistent_values.dat

Cause

The persistent_values.dat file cannot be deleted at Log Forwarder warm start.

The persistent_values.dat file is created when the Log Forwarder stops for storing resume information for all data streams that the Log Forwarder is collecting. This file is used by the Log Forwarder to know where to pick up its work at warm start. The Log Forwarder will not read this file at cold start. If this file is deleted, a new one will be generated when the Log Forwarder stops.

Solution

Perform the following steps:

  1. Make sure that the Log Forwarder user ID has read and write permission to the Log Forwarder working directory.
  2. Rename or delete the persistent_values.dat file.
  3. Cold start the Log Forwarder.

The next time you stop the Log Forwarder, the persistent_values.dat file will be created again, and deleted at Log Forwarder warm start.