Hey, I've been having the same issue. I was told that 0.10.1.x is not compatible with LS 5.x . So I installed 6.2.7 version of logstash Plugin for both Input and Output and still it doesn't work for me. I've tried everything.
Logstash -> Kafka -> ELK
Follow my thread, may be it will be useful to troubleshoot your issue.
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