# Bug in elasticsearch 5 **URL:** \ **Category:** Elasticsearch\ **Created:** [February 17, 2017, 6:07am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436 "2017-02-17T06:07:43Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Kamaljit\_Pati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kamaljit_pati/32/13731_2.png) [@Kamaljit\_Pati](https://discuss.elastic.co/u/Kamaljit_Pati)\ **Post date:** [February 17, 2017, 6:07am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/1 "2017-02-17T06:07:43Z")
Hi All, I am going to update elasticsearch 2.3.3 to 5.2.0 in my organization. But 1 bug I noticed which was before in elasticsearch 2 also that if i run a script which continuously pushes data to elasticsearch without any sleep or anything. Then within 3 minutes i am observing that : curl: (7) Failed to connect to ::1: Cannot assign requested address curl: (7) Failed to connect to ::1: Cannot assign requested address curl: (7) Failed to connect to ::1: Cannot assign requested address curl: (7) Failed to connect to ::1: Cannot assign requested address curl: (7) Failed to connect to ::1: Cannot assign requested address messages are coming. after a second or 2, again datas are successfully pushed. Within that fraction of time datas are being lost. Please reply me why it is happening?? ---
**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:** [February 17, 2017, 6:10am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/2 "2017-02-17T06:10:34Z")
What does your script actually do? ---
**Author:** ![Kamaljit\_Pati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kamaljit_pati/32/13731_2.png) [@Kamaljit\_Pati](https://discuss.elastic.co/u/Kamaljit_Pati)\ **Post date:** [February 17, 2017, 6:13am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/3 "2017-02-17T06:13:50Z")
This is my script : #! /usr/bin/sh while [1] do curl 'localhost:9200/movies/movie/'$i'' -d'{"name":"kamaljit"}' done Only it is pushing data without any sleep. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [February 17, 2017, 6:37am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/4 "2017-02-17T06:37:55Z")
Anything in logs? ---
**Author:** ![Kamaljit\_Pati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kamaljit_pati/32/13731_2.png) [@Kamaljit\_Pati](https://discuss.elastic.co/u/Kamaljit_Pati)\ **Post date:** [February 17, 2017, 9:07am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/5 "2017-02-17T09:07:29Z")
Hi David, At that time root logger was in debug mode. In that everything was normal. Like i said that "Cannot assign requested address " situation persists for at least a second or 2 and then again it was successful in inserting the values. But if need the logs which log you want normal mode logs or debug mode logs. I will again reproduce this and send you the logs. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [February 17, 2017, 9:25am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/6 "2017-02-17T09:25:25Z")
Normal logs would be fine. I wonder also if you can use x-pack to monitor a bit what is happening in your cluster. May be you are running out of some resources? Note that the right way to send a lot of data to elasticsearch is by using bulk but I guess you are trying to overload here elasticsearch to run some "performance tests". If so, I'd encourage you to look at Rally project: [https://github.com/elastic/rally](https://github.com/elastic/rally) ---
**Author:** ![Kamaljit\_Pati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kamaljit_pati/32/13731_2.png) [@Kamaljit\_Pati](https://discuss.elastic.co/u/Kamaljit_Pati)\ **Post date:** [February 17, 2017, 11:09am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/7 "2017-02-17T11:09:21Z")
Hi david, you were saying right. When i gave more heap space this situation is not coming, i observed for atleast 7 mins. Is there any direct impact of heap space on this?? And yaa i was doing some performance testing. I need to know how it is behaving under heavy load. And i think X-pack is not free. So we are not using it only. Thanks David for your input. Regards Kamaljit ---
**Author:** ![Kamaljit\_Pati](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kamaljit_pati/32/13731_2.png) [@Kamaljit\_Pati](https://discuss.elastic.co/u/Kamaljit_Pati)\ **Post date:** [February 17, 2017, 11:20am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/8 "2017-02-17T11:20:54Z")
Again in another server i gave 16GB as heap size, here also this problem "Failed to connect to ::1: Cannot assign requested address" is coming. May be you are right, bulk is the procedure i should go for. But in between please check what is the cause for it to happen. I am testing in one server cluster(just for testing). It has 32 processor cores and 132 GB RAM. I gave 16 GB as heap space. If you can point me in the right direction, then it will be great use. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [February 17, 2017, 11:26am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/9 "2017-02-17T11:26:10Z")
> [@Kamaljit\_Pati](#): > > And i think X-pack is not free There is a free license here [Subscriptions | Elastic Stack Products & Support | Elastic](https://www.elastic.co/subscriptions) It will give you access to some features for free like cluster monitoring. ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [February 17, 2017, 11:26am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/10 "2017-02-17T11:26:52Z")
132Gb of RAM or 32Gb of RAM? ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [March 17, 2017, 11:27am UTC](https://discuss.elastic.co/t/bug-in-elasticsearch-5/75436/11 "2017-03-17T11:27:30Z")
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