# Error on Master Nodes

**URL:** <https://discuss.elastic.co/t/error-on-master-nodes/51705>\
**Category:** Elasticsearch\
**Created:** [June 2, 2016, 1:47pm UTC](https://discuss.elastic.co/t/error-on-master-nodes/51705 "2016-06-02T13:47:44Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![tgdesrochers](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tgdesrochers/32/51322_2.png) [@tgdesrochers](https://discuss.elastic.co/u/tgdesrochers)\
**Post date:** [June 2, 2016, 1:47pm UTC](https://discuss.elastic.co/t/error-on-master-nodes/51705/1 "2016-06-02T13:47:44Z")

</div>

ES 2.3.1

On my Master Nodes I am seeing the below error:

```
[2016-06-02 08:45:11,438][INFO][cluster.metadata] [MASTER_NODE_1] [cobalt-bro-2016.06.02] update_mapping [BRO]
[2016-06-02 08:54:55,933][DEBUG][action.admin.cluster.stats] [MASTER_NODE_1] failed to execute on node [tqihTxVCQx-NswEHjpEtqA]
RemoteTransportException[[WORKER_NODE_12][10.1.55.19:9300][cluster:monitor/stats[n]]]; nested: AlreadyClosedException[this IndexReader is closed];
Caused by: org.apache.lucene.store.AlreadyClosedException: this IndexReader is closed
        at org.apache.lucene.index.IndexReader.ensureOpen(IndexReader.java:274)
        at org.apache.lucene.index.CompositeReader.getContext(CompositeReader.java:101)
        at org.apache.lucene.index.CompositeReader.getContext(CompositeReader.java:55)
        at org.apache.lucene.index.IndexReader.leaves(IndexReader.java:438)
        at org.elasticsearch.search.suggest.completion.Completion090PostingsFormat.completionStats(Completion090PostingsFormat.java:330)
        at org.elasticsearch.index.shard.IndexShard.completionStats(IndexShard.java:765)
        at org.elasticsearch.action.admin.indices.stats.CommonStats.(CommonStats.java:164)
        at org.elasticsearch.action.admin.cluster.stats.TransportClusterStatsAction.nodeOperation(TransportClusterStatsAction.java:108)
        at org.elasticsearch.action.admin.cluster.stats.TransportClusterStatsAction.nodeOperation(TransportClusterStatsAction.java:54)
        at org.elasticsearch.action.support.nodes.TransportNodesAction.nodeOperation(TransportNodesAction.java:92)
        at org.elasticsearch.action.support.nodes.TransportNodesAction$NodeTransportHandler.messageReceived(TransportNodesAction.java:230)
        at org.elasticsearch.action.support.nodes.TransportNodesAction$NodeTransportHandler.messageReceived(TransportNodesAction.java:226)
        at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:75)
        at org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.doRun(MessageChannelHandler.java:300)
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)
```

I did some googling but cannot see anything for elasticsearch and [this IndexReader cannot be used anymore as one of its child readers was closed].

This happens a lot and it is effecting indexing. Any help into why I am seeing this would be appreciated.

---

<div class="post-metadata">

**Author:** ![TroyAndAbed](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@TroyAndAbed](https://discuss.elastic.co/u/TroyAndAbed)\
**Post date:** [June 2, 2016, 1:52pm UTC](https://discuss.elastic.co/t/error-on-master-nodes/51705/2 "2016-06-02T13:52:15Z")

</div>

See: [RemoteTransportException - AlreadyClosedException[this IndexReader is closed]](https://discuss.elastic.co/t/remotetransportexception-alreadyclosedexception-this-indexreader-is-closed/49577/2?u=troyandabed)

---

<div class="post-metadata">

**Author:** ![tgdesrochers](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/tgdesrochers/32/51322_2.png) [@tgdesrochers](https://discuss.elastic.co/u/tgdesrochers)\
**Post date:** [June 2, 2016, 3:16pm UTC](https://discuss.elastic.co/t/error-on-master-nodes/51705/3 "2016-06-02T15:16:57Z")

</div>

Thank you. I will try an update to ES 2.3.3

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<div class="post-metadata">

**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, 10:46pm UTC](https://discuss.elastic.co/t/error-on-master-nodes/51705/4 "2017-07-05T22:46:50Z")

</div>