# Bulk API insertion failed **URL:** \ **Category:** Elasticsearch\ **Created:** [April 16, 2018, 9:28am UTC](https://discuss.elastic.co/t/bulk-api-insertion-failed/128152 "2018-04-16T09:28:24Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![gvkiran007](https://avatars.discourse-cdn.com/v4/letter/g/cdc98d/32.png) [@gvkiran007](https://discuss.elastic.co/u/gvkiran007)\ **Post date:** [April 16, 2018, 9:28am UTC](https://discuss.elastic.co/t/bulk-api-insertion-failed/128152/1 "2018-04-16T09:28:25Z")
Hi Team, Using .Net I am not able to do the bulk insert (bulk API call). I am using elastic search 1.72 version. I am getting following error: **The operation has timed out** ( for 100 documents) From last two days, I am facing this issue, before that, it worked fine for 10k documents bulk insertion. Please, can anyone help me on this issue. Thanks, Kiran. ---
**Author:** ![Igor\_Motov](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/igor_motov/32/45193_2.png) [@Igor\_Motov](https://discuss.elastic.co/u/Igor_Motov)\ **Post date:** [April 16, 2018, 8:26pm UTC](https://discuss.elastic.co/t/bulk-api-insertion-failed/128152/2 "2018-04-16T20:26:35Z")
That probably means that you cluster is unresponsive that can be caused by a lot of different reasons in such an old version as v1.7.2. I don't think anybody would be able to help you here without knowing more about your cluster health, looking at its stats and log files. It is possible that your cluster is just overloaded. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 14, 2018, 8:26pm UTC](https://discuss.elastic.co/t/bulk-api-insertion-failed/128152/3 "2018-05-14T20:26:59Z")
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