# Hanging Threads?

**URL:** https://discuss.elastic.co/t/hanging-threads/77086
**Category:** Elasticsearch
**Created:** [March 2, 2017, 4:30am UTC](https://discuss.elastic.co/t/hanging-threads/77086 "2017-03-02T04:30:46Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![Suresh\_Narasimhan](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@Suresh\_Narasimhan](https://discuss.elastic.co/u/Suresh_Narasimhan)
#### Post date: [March 2, 2017, 4:30am UTC](https://discuss.elastic.co/t/hanging-threads/77086/1 "2017-03-02T04:30:46Z")

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aws1 search 7 672 0  
aws1 search 7 625 0  
aws1 search 7 593 0  
aws1 search 7 1000 53  
aws1 search 7 620 0  
aws1 search 7 614 0  
aws1 search 7 671 0  
aws1 search 7 1000 39  
aws1 search 7 590 0  
aws1 search 7 1000 30  
aws1 search 6 0 0  
aws1 search 7 1000 33  
aws1 search 6 0 0  
aws1 search 7 653 0  
aws1 search 7 661 0  
aws1 search 7 776 0  
aws1 search 7 598 0  
aws1 search 7 630 0

The above is the partial output from /\_cat/thread\_pool API  
I see queues are in this state for the past hour , there is no traffic to ES.  
I see this queue is never dequeued

one of node where the queue is full looks like this [http://pastebin.com/kJsDwtGx](http://pastebin.com/kJsDwtGx)

how do I figure out what is causing this?

is there a way flush the queue out when this happens?

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<div class="post-metadata">

### 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: [March 2, 2017, 8:08am UTC](https://discuss.elastic.co/t/hanging-threads/77086/2 "2017-03-02T08:08:57Z")

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Can you install Monitoring to see what may be causing it?

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<div class="post-metadata">

### Author: ![Suresh\_Narasimhan](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@Suresh\_Narasimhan](https://discuss.elastic.co/u/Suresh_Narasimhan)
#### Post date: [March 2, 2017, 4:07pm UTC](https://discuss.elastic.co/t/hanging-threads/77086/3 "2017-03-02T16:07:03Z")

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Thanks for the reply Mark , I do have monitoring everything looks on as the node stats api also reports any suggestions what I should look for?

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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: [March 30, 2017, 4:07pm UTC](https://discuss.elastic.co/t/hanging-threads/77086/4 "2017-03-30T16:07:24Z")

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