在启动ElasticSearch的时候出现报错信息Permission denied

在启动ElasticSearch的时候出现报错信息Permission denied

当把ElasticSearch部署好之后，然后进入到elasticsearch/bin目录下运行./elasticsearch出现了报错信息， log4j:ERROR setFile(null,true) call failed.java.io.FileNotFoundException: /usr/local/elasticsearch/logs/elasticsearch.log at java.io.FileOutputStream.open(Native Method) at java.io.FileOutputStream.(FileOutputStream.java:221) at java.io.FileOutputStream.(FileOutputStream.java:142) at org.apache.log4j.FileAppender.setFile(FileAppender.java:294) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:165) at org.apache.log4j.DailyRollingFileAppender.activateOptions(DailyRollingFileAppender.java:223) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:307) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:172) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:104) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:842) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514) at org.apache.log4j.PropertyConfigurator.configure(PropertyConfigurator.java:440) at org.elasticsearch.common.logging.log4j.LogConfigurator.configure(LogConfigurator.java:128) at org.elasticsearch.bootstrap.Bootstrap.setupLogging(Bootstrap.java:204) at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:258) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)一开始以为是目前权限不够，在前面加上sudo 之后运行，还是报错：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:285) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)Refer to the log for complete error details.后来发现，我原来是在root用户下启动ES，所以不行，这个时候应该将elasticsearch的部署文档的所有者改为一个非root用户， sudo chown -R hadoop:hadoop elasticsearch-5.5.0sudo chgrp -R hadoop:hadoop elasticsearch-5.5.0而且还要切换到hadoop用户下之后，才可以去执行ES的启动文件。 原因说明：由于ElasticSearch可以接收用户的脚本并执行，处于安全性考虑，建议创建一个单独的用户来运行ElasticSearch。当然，可以通过配置来实现root用户启动。修改bin目录elasticsearch.in.sh文件中追加（不过不建议）：JAVA_OPTS="$JAVA_OPTS -Des.insecure.allow.root=true"

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