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在CentOS 6.5 上运行Elasticsearch 2.3,异常如下：
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| 1 2 3 4 5 6 | 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. |
异常描述为不能以root权限运行Elasticsearch.解决办法是运行时加上参数：
bin/elasticsearch -Des.insecure.allow.root=true
或者修改bin/elasticsearch，加上ES_JAVA_OPTS属性：
ES_JAVA_OPTS=”-Des.insecure.allow.root=true”
保存之后重启Elasticsearch。
