Incorrect setting for the minimal severity for triggering alarms
Incorrect alarm sensitivity settings
The same Error log filter value was added to both the Match list and the Ignore list.
Error log collection fails due to Chinese character set on the host OS
Check alarm sensitivity levels to make sure the alarms you are expecting to see are enabled as described in KB 133655
Review the Error log filter values to confirm that conflicting match and ignore values are not present.
Details on using the SQL Server Error Log Filter can be found in KB 69941.
This issue for the Chinese character set support is listed as known issue SSFOG-770 and is planned to be fixed in a future release of the SQL Server cartridge.