# AWS OpenSearch Dashboards v1.2 - Error fetching hot indices: Invalid index name \[\_hot\], must not start with '\_'

**URL:** https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259
**Category:** OpenDistro
**Tags:** troubleshoot
**Created:** [April 17, 2022, 1:16pm UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259 "2022-04-17T13:16:01Z")
**Posts on this page:** 7
**Page:** 1

<div class="post-metadata">

### Author: ![okapko](https://avatars.discourse-cdn.com/v4/letter/o/8e7dd6/32.png) [@okapko](https://forum.opensearch.org/u/okapko)
#### Post date: [April 17, 2022, 1:16pm UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/1 "2022-04-17T13:16:01Z")

</div>

Hello, I’ve updated from AWS OpenSearch 1.1 to the latest 1.2. And now I’ve got an issue when trying to list my hot and warm indices.  
What should I do to fix it ? Any ideas?

 ![Знімок екрана 2022-04-17 о 16.14.01](https://us1.discourse-cdn.com/flex019/uploads/mauve_hedgehog/original/2X/3/395f2b55928778c77c80a2ae1b3a677c6bec2abd.png)  
OpenSearch Dashboards → Index Management → Hot/Warm indices.

Full error:  
`Error fetching warm indices. {"error":{"root_cause":[{"type":"invalid_index_name_exception","reason":"Invalid index name [_warm], must not start with '_'.","index":"_warm","index_uuid":"_na_"}],"type":"invalid_index_name_exception","reason":"Invalid index name [_warm], must not start with '_'.","index":"_warm","index_uuid":"_na_"},"status":400}`

---

<div class="post-metadata">

### Author: ![okapko](https://avatars.discourse-cdn.com/v4/letter/o/8e7dd6/32.png) [@okapko](https://forum.opensearch.org/u/okapko)
#### Post date: [April 17, 2022, 1:51pm UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/2 "2022-04-17T13:51:00Z")

</div>

Actually, I don’t have any indices starting with ‘ **\_** ’. Also, it was working on my previous version - OpenSearch Dashboards **v1.1**.

---

<div class="post-metadata">

### Author: ![BlackMetalz](https://avatars.discourse-cdn.com/v4/letter/b/d6d6ee/32.png) [@BlackMetalz](https://forum.opensearch.org/u/BlackMetalz)
#### Post date: [April 18, 2022, 8:00am UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/3 "2022-04-18T08:00:00Z")

</div>

It is clear we can not use index names starting with ‘\_’.  
But I guess in 1.1 Opensearch forget that check and in 1.2 they added backup again somehow xD

You might have to change the prefix for hot indices

---

<div class="post-metadata">

### Author: ![okapko](https://avatars.discourse-cdn.com/v4/letter/o/8e7dd6/32.png) [@okapko](https://forum.opensearch.org/u/okapko)
#### Post date: [April 18, 2022, 11:42am UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/4 "2022-04-18T11:42:11Z")

</div>

Thanks for your reply)

I believe that in my specific case AWS support team should fix this issue from their side, because I’ve no idea what can I do from my side.

---

<div class="post-metadata">

### Author: ![chen](https://avatars.discourse-cdn.com/v4/letter/c/3d9bf3/32.png) [@chen](https://forum.opensearch.org/u/chen)
#### Post date: [April 20, 2022, 4:45am UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/5 "2022-04-20T04:45:32Z")

</div>

i have the same issue,  
tried to downgrade the version but its still the same.

do you have any solution for this ?

---

<div class="post-metadata">

### Author: ![okapko](https://avatars.discourse-cdn.com/v4/letter/o/8e7dd6/32.png) [@okapko](https://forum.opensearch.org/u/okapko)
#### Post date: [April 20, 2022, 8:40am UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/6 "2022-04-20T08:40:23Z")

</div>

Hello, I haven’t.

But I created a GitHub issue and waiting for support from the OpenSearch community.  
[https://github.com/opensearch-project/OpenSearch/issues/2939](https://github.com/opensearch-project/OpenSearch/issues/2939)

---

<div class="post-metadata">

### Author: ![dbbaughe](https://avatars.discourse-cdn.com/v4/letter/d/bbe5ce/32.png) [@dbbaughe](https://forum.opensearch.org/u/dbbaughe)
#### Post date: [April 20, 2022, 2:57pm UTC](https://forum.opensearch.org/t/aws-opensearch-dashboards-v1-2-error-fetching-hot-indices-invalid-index-name-hot-must-not-start-with/9259/7 "2022-04-20T14:57:18Z")

</div>

That is a known issue on the managed service - please cut a support ticket and they should be able to help resolve it.