Created a nas Auto Operator Pre-Processing rule to exclude alarms for a list of hostnames, but the rule is being applied to all alarms that match the other pre-processing rule criteria even if the hostname is not contained in the match string list.
Incorrectly formed hostname match string:
Example of malformed match string:
UIM 8.51 nas 8.56
The vertical bar ( | ) at the end of the hostname match string acts as a wildcard match for any string causing the Pre-Processing rule to match any hostname. Remove the trailing vertical bar from the match string to correct this issue.
Note that this behavior applies to any match strings for other Auto Operator Preprocessing Rule (and Profile) fields like probe, robot, etc.