# \`ignore\` in index creation

**URL:** <https://discuss.elastic.co/t/ignore-in-index-creation/84078>\
**Category:** Elasticsearch\
**Created:** [April 29, 2017, 6:22am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078 "2017-04-29T06:22:13Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![Bhargavi\_Sri](https://avatars.discourse-cdn.com/v4/letter/b/b38774/32.png) [@Bhargavi\_Sri](https://discuss.elastic.co/u/Bhargavi_Sri)\
**Post date:** [April 29, 2017, 6:22am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/1 "2017-04-29T06:22:13Z")

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I have the following statement:

es.indices.create(index=index\_name,ignore=[400,404])

In a sample program that I created, the index got created again though it was already existing on the cluster. So what exactly does 'ignore' do in the creation of index.

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**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:** [April 29, 2017, 6:40am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/2 "2017-04-29T06:40:16Z")

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An index can not be created **again** if one already exists.

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<div class="post-metadata">

**Author:** ![Bhargavi\_Sri](https://avatars.discourse-cdn.com/v4/letter/b/b38774/32.png) [@Bhargavi\_Sri](https://discuss.elastic.co/u/Bhargavi_Sri)\
**Post date:** [April 29, 2017, 7:06am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/3 "2017-04-29T07:06:11Z")

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But the index did get created when I passed the ignore argument

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<div class="post-metadata">

**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:** [April 29, 2017, 7:48am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/4 "2017-04-29T07:48:44Z")

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I see.

Ignore parameter means here that if you get back a `400` or `404` status code, don't fail and continue.

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<div class="post-metadata">

**Author:** ![Bhargavi\_Sri](https://avatars.discourse-cdn.com/v4/letter/b/b38774/32.png) [@Bhargavi\_Sri](https://discuss.elastic.co/u/Bhargavi_Sri)\
**Post date:** [April 29, 2017, 8:39am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/5 "2017-04-29T08:39:26Z")

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So it just appends to the existing index? Cause that is what happened in my execution

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<div class="post-metadata">

**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:** [April 29, 2017, 11:17am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/6 "2017-04-29T11:17:41Z")

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It appends what?

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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:** [May 27, 2017, 11:26am UTC](https://discuss.elastic.co/t/ignore-in-index-creation/84078/7 "2017-05-27T11:26:25Z")

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