# Reindex api request failing on Elasticsearch 6.6

**URL:** <https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428>\
**Category:** Elasticsearch\
**Created:** [November 17, 2021, 10:44am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428 "2021-11-17T10:44:32Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![pratiksha](https://avatars.discourse-cdn.com/v4/letter/p/cab0a1/32.png) [@pratiksha](https://discuss.elastic.co/u/pratiksha)\
**Post date:** [November 17, 2021, 10:44am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428/1 "2021-11-17T10:44:32Z")

</div>

Facing issue while running reindex api on ES v6.6.  
Please refer below shared output:  
**Command:**

```auto
$ curl -XPOST http://<elasticsearch-svc>:9200/_reindex?pretty -H 'Content-Type: application/json' -d'
 {
 "source": {
 "index": "dc-log-2020-11-02"
 },
 "dest": {
 "index": "dc-log-new-index"
 }
}
 '

```

**Output:**

```auto
{
"error" : {
"root_cause" : [
{
"type" : "illegal_argument_exception",
"reason" : "[dc-log-2020-11-02][dc-log-mapping][SVCz6XgBjqpvb352VFA8] didn't store _source"
}
],
"type" : "illegal_argument_exception",
"reason" : "[dc-log-2020-11-02][dc-log-mapping][SVCz6XgBjqpvb352VFA8] didn't store _source"
},
"status" : 400
}

```

Please suggest what could be the cause for this error and how this can be resolved.  
Thanks in advance

---

<div class="post-metadata">

**Author:** ![Wolfram\_Haussig](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wolfram_haussig/32/70528_2.png) [@Wolfram\_Haussig](https://discuss.elastic.co/u/Wolfram_Haussig)\
**Post date:** [November 17, 2021, 11:13am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428/2 "2021-11-17T11:13:20Z")

</div>

Hi,

Does your Source Index contain the `_source` field or is it disabled?  
If it is disabled you cannot use the reindex API to reindex the data as the [documentation](https://www.elastic.co/guide/en/elasticsearch/reference/6.6/docs-reindex.html) states:

> Reindex requires [`_source`](https://www.elastic.co/guide/en/elasticsearch/reference/6.6/mapping-source-field.html) to be enabled for all documents in the source index.

Best regards  
Wolfram

---

<div class="post-metadata">

**Author:** ![pratiksha](https://avatars.discourse-cdn.com/v4/letter/p/cab0a1/32.png) [@pratiksha](https://discuss.elastic.co/u/pratiksha)\
**Post date:** [November 17, 2021, 11:17am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428/3 "2021-11-17T11:17:18Z")

</div>

Hi,  
Thanks for the quick reply.  
How can I verify if \_source field is enabled or disabled?

---

<div class="post-metadata">

**Author:** ![Wolfram\_Haussig](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wolfram_haussig/32/70528_2.png) [@Wolfram\_Haussig](https://discuss.elastic.co/u/Wolfram_Haussig)\
**Post date:** [November 17, 2021, 11:22am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428/4 "2021-11-17T11:22:40Z")

</div>

You can either check the [mapping](https://www.elastic.co/guide/en/elasticsearch/reference/6.6/mapping-source-field.html) for the index which shows something like this:

```auto
"_source": {
   "enabled": false
}

```

or just check in Kibana/Elasticsearch query if the `_source` field exists...

---

<div class="post-metadata">

**Author:** ![pratiksha](https://avatars.discourse-cdn.com/v4/letter/p/cab0a1/32.png) [@pratiksha](https://discuss.elastic.co/u/pratiksha)\
**Post date:** [November 18, 2021, 5:09am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428/5 "2021-11-18T05:09:33Z")

</div>

Thank you for the info.

---

<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:** [December 16, 2021, 5:09am UTC](https://discuss.elastic.co/t/reindex-api-request-failing-on-elasticsearch-6-6/289428/6 "2021-12-16T05:09:51Z")

</div>

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