Resolving Filebeat Startup Failure: EOF Error in Registrar State

Method 1 : Filebeat startup failure – the log shows registrar: Error loading state: Error decoding states: EOF.

Log excerpts (2022‑09‑27 15:54:19) display the initialization steps, including loading configuration, starting monitoring, and finally the fatal error:

2022-09-27T15:54:19.978+0800	ERROR	instance/beat.go:802	Exiting: Could not start registrar: Error loading state: Error decoding states: EOF

The error indicates that the registrar's persisted state file is corrupted or incomplete.

Resolution steps performed on the host dotnetextranet:

1. Change to the Filebeat data directory: cd data/ 2. List the contents to verify existing files: ll 3. Rename the existing registry folder to keep a backup: mv registry registry.20220927 4. Run the start script with debugging enabled: sh -x start.sh 5. The script launches Filebeat in the background using nohup: nohup ./filebeat -e -c filebeat_applogs.yml 6. Verify that Filebeat is running with: ps -ef | grep filebeat Process list shows the Filebeat process (PID 27182) and the grep command.

After resetting the registry, Filebeat starts successfully and begins sending logs to Logstash as configured.

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