# ClusterHealthRequest

**URL:** <https://discuss.elastic.co/t/clusterhealthrequest/155822>\
**Category:** Elasticsearch\
**Created:** [November 8, 2018, 5:50am UTC](https://discuss.elastic.co/t/clusterhealthrequest/155822 "2018-11-08T05:50:27Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![madhan3396](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/madhan3396/32/57318_2.png) [@madhan3396](https://discuss.elastic.co/u/madhan3396)\
**Post date:** [November 8, 2018, 5:50am UTC](https://discuss.elastic.co/t/clusterhealthrequest/155822/1 "2018-11-08T05:50:27Z")

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Hi team,  
Consider I'm having two indices namely twitter1, twitter2.

```
String indexpattern = "twitter*"
ClusterHealthRequest request = new ClusterHealthRequest(indexpattern);
ClusterHealthResponse healthResponse = client.cluster().health(request, RequestOptions.DEFAULT);

```

Here healthResponse.getIndices().entrySet() returns twitter1 and twitter2.

When indexpattern = "twitter1" the healthResponse.getIndices().entrySet() returns twitter1. Thats fine.

But when indexpattern = "twitter" it throws an exception saying java.io.IOException: listener timeout after waiting for [30000] ms after 30 seconds, instead of returning empty set.

Is that normal to throw exception when indices in the cluster doesn't match the pattern?

NOTE: I'm in elasticsearch and elasticsearch-rest-high-level-client version 6.4.0.

---

<div class="post-metadata">

**Author:** ![DavidTurner](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/davidturner/32/22453_2.png) [@DavidTurner](https://discuss.elastic.co/u/DavidTurner)\
**Post date:** [November 8, 2018, 8:49am UTC](https://discuss.elastic.co/t/clusterhealthrequest/155822/2 "2018-11-08T08:49:27Z")

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> [@madhan3396](#):
>
> Is that normal to throw exception when indices in the cluster doesn't match the pattern?

Yes. A `ClusterHealthRequest` for a particular index is a request to be notified when that index has been created. Since the `twitter` index is never created, the request eventually times out.

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<div class="post-metadata">

**Author:** ![madhan3396](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/madhan3396/32/57318_2.png) [@madhan3396](https://discuss.elastic.co/u/madhan3396)\
**Post date:** [November 8, 2018, 10:36am UTC](https://discuss.elastic.co/t/clusterhealthrequest/155822/3 "2018-11-08T10:36:30Z")

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So returning empty map rather than throwing timeout exception might be a better option.

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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:** [December 6, 2018, 10:36am UTC](https://discuss.elastic.co/t/clusterhealthrequest/155822/4 "2018-12-06T10:36:40Z")

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