[LogStash] LogStash cannot be started after configuration

1. Background

Because you need to configure the logstash 5.6.8 version as follows

ssl_endpoint_identification_algorithm：“”

According to the official website: https://www.elastic.co/guide/en/logstash/6.8/plugins-outputs-kafka.html The

configuration “”means that it is disabled. But the error is reported as follows after configuration

Later I tried 我用6.8的就可以启动成功

View the source code as follows

In version 6.8, the underlined ones cannot be found, but the dotted ones can be found.

But the 5.6.8 version can't be found.

Later, the upgraded version solved this problem.