# Error while reindexing from old index to new

**URL:** <https://discuss.elastic.co/t/error-while-reindexing-from-old-index-to-new/169829>\
**Category:** Elasticsearch\
**Created:** [February 25, 2019, 12:37pm UTC](https://discuss.elastic.co/t/error-while-reindexing-from-old-index-to-new/169829 "2019-02-25T12:37:38Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Praneet\_Khandelwal](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/praneet_khandelwal/32/40565_2.png) [@Praneet\_Khandelwal](https://discuss.elastic.co/u/Praneet_Khandelwal)\
**Post date:** [February 25, 2019, 12:37pm UTC](https://discuss.elastic.co/t/error-while-reindexing-from-old-index-to-new/169829/1 "2019-02-25T12:37:38Z")

</div>

I am getting the following error while reindexing my data from old to new indices.

```auto
{"index":"XXXX-2019.02.01","type":"doc","id":"YYYY","cause":{"type":"mapper_parsing_exception","reason":"failed to parse [timestamp]","caused_by":{"type":"illegal_argument_exception","reason":"Invalid format: \\"Feb 1 03:35:47\\""}},"status":400}]}')

```

Any help would be appreciated.

---

<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 25, 2019, 12:49pm UTC](https://discuss.elastic.co/t/error-while-reindexing-from-old-index-to-new/169829/2 "2019-03-25T12:49:53Z")

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