In continuation of the following topic which is now closed:
We found no solution for that. moreover - we just tried installing Logstash 6.5 on a new machine and we get the same results - the logstash runs, but sincedb is never updated. it is being created and "touched" when logstash starts running, but then nothing happens, no new file is added, no existing file is being updated.
The same configuration worked on all previous version (starting from 2.x, 4.x, 5.x, 6.2.4....)
Any way I can debug it and understand?
Really need some help here,