If a record fails during a crawl, the CAS Server discards the failed record and writes a truncated version of the record to the cas-service.log file. If you do not want the CAS Server to write any information about failed records to the log file, you can disable logging for failed records by uncommenting a setting in the cas-service-log4j.properties file.

To exclude failed records from the CAS Service log file:

Once you uncomment the setting, the CAS Server does not write any information about failed records to the log file. However, failed records are still counted as metrics under FAILED_RECORDS.