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Searchhead Pooling: Failed to lock sentinel.txt while saving/deleting search from GUI

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Red banner message in GUI (below) regarding sentinel.txt file lock is preventing updates from the GUI.

Error fixing dangling data: Failed to lock /mnt/search_head_pool/etc/apps/sentinel.txt with return code 1: Success

I do not presently have access to the logs of the system (Splunk 4.2.2 101277 on RHEL).

  • Can sentinel.txt and sentinel.txt.lock safely be deleted?
  • Are there known causes/resolutions for this error?
  • What is the scope/impact of this state?

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