today I upgraded my Elasticstack from Version 6.1.2 to 6.4.0.
Since then Logstash does not start correctly anymore.
I have pasted the logs / output here: https://paste.fedoraproject.org/paste/IR-6sdrXbmRgKgj5QNRbGw
because it exceeds the 7000 character limit of forum posts.
But unfortunately I cannot interpret that error and have no idea what the log is trying to tell me.
Has anybody seen that error and knows a fix or can give me hints or tips how to further investigate / narrow down the problem?