ElasticSearch - Failed to obtain node locks

274

Rajeev Bhat :

I have a single node ElasticSearch Cluster in local. I am unable to start elasticsearch service. Getting this error:

[bhatr@LRVCEM27547]~/elasticsearch-6.8.8/bin% elasticsearch                                                                                          5:30AM
[2020-04-27T05:30:14,280][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [unknown] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to obtain node locks, tried [[/remote/users/bhatr/elasticsearch-6.8.8/data]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:163) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.8.8.jar:6.8.8]
        at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:116) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.8.8.jar:6.8.8]
Caused by: java.lang.IllegalStateException: failed to obtain node locks, tried [[/remote/users/bhatr/elasticsearch-6.8.8/data]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?
        at org.elasticsearch.env.NodeEnvironment.<init>(NodeEnvironment.java:300) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.node.Node.<init>(Node.java:296) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.node.Node.<init>(Node.java:266) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:212) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:212) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) ~[elasticsearch-6.8.8.jar:6.8.8]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-6.8.8.jar:6.8.8]
        ... 6 more

I have tried the answers of this and this post but couldn't resolve. OS: RedHat 7.5

All directories in elasticsearch have write permission
There is no other elastic instance running , I have confirmed through ps -ef | grep java

Please help to resolve this.

Opster Elasticsearch Ninja :

The detailed cause of this error and troubleshooting is explained in this opster's guide.

But still, it was not sufficient(missed rebooting step) so suggested OP to delete the data folder, kill all the existing ES processes and reboot his machine which solved the issue.

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