Should this be a cause of concern?
It seems I am getting delayed logs but unable to pinpoint the root issue.
Elasticsearch is green and running fine, No indexing errors on Graylog nodes, however, it seems Input Buffer and Process Buffer for all nodes are stuck at 100% while Output Buffer is 0%.
depending on your Graylog version you would be able to see that the processing buffer is doing. This way you get a sense what is the problem most of the time - it is very likely that a regex is running wild.