How to troubleshoot CentOS root run Elasticsearch exception

How to troubleshoot CentOS root run Elasticsearch exception

Running Elasticsearch 2.3 on CentOS 6.5, the exception is as follows:

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Exception in thread "main" Java.lang.RuntimeException:don ' t run Elasticsearch as root. At Org.elasticsearch.bootstrap.Bootstrap.initializeNatives (bootstrap.java:93) at Org.elasticsearch.bootstrap.Bootstrap.setup (bootstrap.java:144) at Org.elasticsearch.bootstrap.Bootstrap.init ( bootstrap.java:270) at Org.elasticsearch.bootstrap.Elasticsearch.main (ELASTICSEARCH.JAVA:35) refer to the log for Complete error details.

The exception is described as not being able to run Elasticsearch with root permissions. The solution is to add parameters at run time:

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1	Bin/elasticsearch-des.insecure.allow.root=true

or modify the Bin/elasticsearch, plus the es_java_opts attribute:

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1	Es_java_opts= "-des.insecure.allow.root=true"

Restart Elasticsearch after saving.