I upgraded Elastic Stack from:
- At first 6.3.0 --> 6.4.1 (whole stack)
- Then from 6.4.1 --> 6.4.2 (only Logstash)
- then from 6.4.2 --> 6.5.0 (only Logstash)
After first upgrade I have notice high CPU usage change on logstash nodes comparing to version 6.3.0.
In consequence Logstash stopped consume logs from Kafka.
Then decided to move to version 6.4.2 all goes back to normal (still higher comparing to 6.3.0 but in tolerance).
Then decided to update to new release - CPU usage goes up again!
What could be possible reason for high CPU usage? No error logs or warn logs which could point to the problem.
For comparison please see below CPU usage on node that runs 6.3.0 version:
It seems to be similar problem to this one: Logstash 6.2.2 high CPU usage
Will appreciate your help,