Trouble with filter conditional logic

[Badger]

@willdennis

date {
      match => [ "logTime", "MMM dd HH:mm:ss" ]
      target => "@timestamp"
    }

If your date string does not have a year then the date filter will make an educated guess about what the year should be. Sometimes it gets that wrong. See here for a longer discussion.

Assuming you are looking in Kibana, expand the date range a year backwards and forwards to see if the events are there.