# ElasticSearch 2.3.5 throwing InvalidIndexNameException\[

**URL:** <https://discuss.elastic.co/t/elasticsearch-2-3-5-throwing-invalidindexnameexception/58423>\
**Category:** Elasticsearch\
**Created:** [August 19, 2016, 4:20am UTC](https://discuss.elastic.co/t/elasticsearch-2-3-5-throwing-invalidindexnameexception/58423 "2016-08-19T04:20:09Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Isha](https://avatars.discourse-cdn.com/v4/letter/i/22d042/32.png) [@Isha](https://discuss.elastic.co/u/Isha)\
**Post date:** [August 19, 2016, 4:20am UTC](https://discuss.elastic.co/t/elasticsearch-2-3-5-throwing-invalidindexnameexception/58423/1 "2016-08-19T04:20:09Z")

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Hello,

I have installed es 2.3.5 on two node cluster and am seeing error like below while was trying to shutdown cluster using curl command or when I try to use \_cluster command ,it's throwing similar error as below. I have only installed head plug in along wth ES 2.3.5 . Head plugin is also not working from browser

[\_shutdown] failed to create  
[\_shutdown] InvalidIndexNameException[Invalid index name [_shutdown], must not start with '_']  
at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService.validateIndexName(MetaDataCreateIndexService.java:150)  
at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService.validate(MetaDataCreateIndexService.java:473)  
at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService.access$100(MetaDataCreateIndexService.java:97)  
at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$1.execute(MetaDataCreateIndexService.java:192)  
at org.elasticsearch.cluster.ClusterStateUpdateTask.execute(ClusterStateUpdateTask.java:45)  
at org.elasticsearch.cluster.service.InternalClusterService.runTasksForExecutor(InternalClusterService.java:468)  
at org.elasticsearch.cluster.service.InternalClusterService$UpdateTask.run(InternalClusterService.java:772)  
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:231)  
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:194)  
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)  
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)  
at java.lang.Thread.run(Thread.java:745)  
[2016-08-18 00:14:00,916][WARN][bootstrap] unable to install syscall filter: seccomp unavailable: CONFIG\_SECCOMP not compiled into kernel, CONFIG\_SECCOMP and CONFIG\_SECCOMP\_FILTER are needed  
[2016-08-18 00:14:00,920][WARN][bootstrap] Unable to lock JVM Memory: error=12,reason=Cannot allocate memory  
[2016-08-18 00:14:00,920][WARN][bootstrap] This can result in part of the JVM being swapped out.  
[2016-08-18 00:14:00,920][WARN][bootstrap] Increase RLIMIT\_MEMLOCK, soft limit: 65536, hard limit: 65536  
[2016-08-18 00:14:00,920][WARN][bootstrap] These can be adjusted by modifying /etc/security/limits.conf, for example:

Any help greatly appreciable.

Thanks,

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**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [August 19, 2016, 4:25am UTC](https://discuss.elastic.co/t/elasticsearch-2-3-5-throwing-invalidindexnameexception/58423/2 "2016-08-19T04:25:33Z")

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> [@Isha](#):
>
> while was trying to shutdown cluster using curl command

See [Removed features | Elasticsearch Guide [2.3] | Elastic](https://www.elastic.co/guide/en/elasticsearch/reference/2.3/breaking_20_removed_features.html#_literal__shutdown_literal_api)

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 10:26pm UTC](https://discuss.elastic.co/t/elasticsearch-2-3-5-throwing-invalidindexnameexception/58423/3 "2017-07-05T22:26:48Z")

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