The rocket-fast system for log processing

rsyslog error 2420

Warning imfile input which uses wildcards

This message tells the user that a state file is specified for an imfile input which uses wildcards. This is usually an extremely bad idea, as the state file becomes corrupted if multiple files match the wildcard. The option primarily exist for exotic use cases and it is strongly recommended not to specify state file names in this setup.

For more details check the documentation