# java.nio.channels.OverlappingFileLockException: null
**URL:** https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096
**Category:** Elasticsearch
**Created:** [October 7, 2017, 2:46am UTC](https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096 "2017-10-07T02:46:20Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@JJerpseth](https://discuss.elastic.co/u/JJerpseth)
#### Post date: [October 7, 2017, 2:46am UTC](https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096/1 "2017-10-07T02:46:20Z")
Please note: I have already tried the solutions I found online which included
1 -- reboot machine
2 -- delete node.lock in my data areas
Node dropped out of the cluster then elasticsearch failed to start with
[2017-10-06T15:25:43,864][INFO][o.e.n.Node] [colo1-es6] initializing ...
[2017-10-06T15:25:43,937][ERROR][o.e.b.Bootstrap] Exception
java.nio.channels.OverlappingFileLockException: null
at sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255) ~[?:?]
at sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152) ~[?:?]
at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1108) ~[?:?]
at java.nio.channels.FileChannel.tryLock(FileChannel.java:1155) ~[?:1.8.0\_131]
at org.apache.lucene.store.NativeFSLockFactory.obtainFSLock(NativeFSLockFactory.java:114) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b
65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.apache.lucene.store.FSLockFactory.obtainLock(FSLockFactory.java:41) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec964
58315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.apache.lucene.store.BaseDirectory.obtainLock(BaseDirectory.java:45) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec964
58315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.elasticsearch.env.NodeEnvironment.(NodeEnvironment.java:226) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.node.Node.(Node.java:264) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.node.Node.(Node.java:244) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:232) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:232) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:351) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) [elasticsearch-5.5.1.jar:5.5.1]
---
### Author:  [@jasontedor](https://discuss.elastic.co/u/jasontedor)
#### Post date: [October 7, 2017, 5:08pm UTC](https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096/2 "2017-10-07T17:08:45Z")
I’ve seen this before when a user inadvertently had a data path defined twice. Can you check for this possibility (check path.data and default.path.data)? We added detection for this but maybe it’s broken so let’s rule this possibility out before trying to think of others. Also, can you start Elasticsearch with `-E logger.org.elasticsearch.env.NodeEnvironment=trace`. I hope this will give us everything we need to debug the problem here.
---
### Author:  [@JJerpseth](https://discuss.elastic.co/u/JJerpseth)
#### Post date: [October 9, 2017, 4:18pm UTC](https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096/3 "2017-10-09T16:18:26Z")
> [@jasontedor](#):
>
> -E logger.org.elasticsearch.env.NodeEnvironment=trace
I checked and only have path.data.
Here is the new log file.
[2017-10-09T09:15:57,015][INFO][o.e.n.Node] [colo1-es6] initializing ...
[2017-10-09T09:15:57,040][ERROR][o.e.b.Bootstrap] Exception
java.nio.channels.OverlappingFileLockException: null
at sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255) ~[?:?]
at sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152) ~[?:?]
at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1108) ~[?:?]
at java.nio.channels.FileChannel.tryLock(FileChannel.java:1155) ~[?:1.8.0\_131]
at org.apache.lucene.store.NativeFSLockFactory.obtainFSLock(NativeFSLockFactory.java:114) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.apache.lucene.store.FSLockFactory.obtainLock(FSLockFactory.java:41) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.apache.lucene.store.BaseDirectory.obtainLock(BaseDirectory.java:45) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.elasticsearch.env.NodeEnvironment.(NodeEnvironment.java:226) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.node.Node.(Node.java:264) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.node.Node.(Node.java:244) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:232) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:232) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:351) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.Command.main(Command.java:88) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) [elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) [elasticsearch-5.5.1.jar:5.5.1]
[2017-10-09T09:15:57,047][WARN][o.e.b.ElasticsearchUncaughtExceptionHandler] [colo1-es6] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.nio.channels.OverlappingFileLockException
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:127) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.cli.Command.main(Command.java:88) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) ~[elasticsearch-5.5.1.jar:5.5.1]
Caused by: java.nio.channels.OverlappingFileLockException
at sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255) ~[?:?]
at sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152) ~[?:?]
at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1108) ~[?:?]
at java.nio.channels.FileChannel.tryLock(FileChannel.java:1155) ~[?:1.8.0\_131]
at org.apache.lucene.store.NativeFSLockFactory.obtainFSLock(NativeFSLockFactory.java:114) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.apache.lucene.store.FSLockFactory.obtainLock(FSLockFactory.java:41) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.apache.lucene.store.BaseDirectory.obtainLock(BaseDirectory.java:45) ~[lucene-core-6.6.0.jar:6.6.0 5c7a7b65d2aa7ce5ec96458315c661a18b320241 - ishan - 2017-05-30 07:29:46]
at org.elasticsearch.env.NodeEnvironment.(NodeEnvironment.java:226) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.node.Node.(Node.java:264) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.node.Node.(Node.java:244) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap$5.(Bootstrap.java:232) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:232) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:351) ~[elasticsearch-5.5.1.jar:5.5.1]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) ~[elasticsearch-5.5.1.jar:5.5.1]
... 6 more
---
### Author:  [@jasontedor](https://discuss.elastic.co/u/jasontedor)
#### Post date: [October 9, 2017, 8:47pm UTC](https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096/4 "2017-10-09T20:47:26Z")
Are you sure that you set the loger setting correctly? There should be a log line like `obtaining node lock on` if the node was indeed started with `logger.org.elasticsearch.env.NodeEnvironment` set to `trace`.
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### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [November 6, 2017, 8:47pm UTC](https://discuss.elastic.co/t/java-nio-channels-overlappingfilelockexception-null/103096/5 "2017-11-06T20:47:50Z")
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