After a while decided to manually remove all plugins and modules, and reinstalled elasticsearch, this helped, while meanwhile, logstash fails with:
[2019-03-29T23:02:47,796][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:03:07,668][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:03:28,046][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:03:47,884][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:04:08,362][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:04:28,204][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:04:48,694][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
[2019-03-29T23:05:08,807][ERROR][org.logstash.Logstash ] java.lang.IllegalSt