Logstash sends exception with stacktraces to Elasticsearch and this results sometimes to this warning:
The length of text to be analyzed for highlighting  exceeded the allowed maximum of  set for the next major Elastic version. For large texts, indexing with offsets or term vectors is recommended!
I would like to know what I can do about this. I took at look at index_options and adjusted the logstash template so that the message field has index_options set to docs. Does this make sense? It did not help. The warning is still there.
Also, how can I find out what data it refers to. I have several clients and it could be anyone. Is there a way to find out without checking every clients Logstash log?