[role="xpack"]
[testenv="basic"]
[[unfreeze-index-api]]
=== Unfreeze index API
++++
<titleabbrev>Unfreeze index</titleabbrev>
++++

Unfreezes an index.

[[unfreeze-index-api-request]]
==== {api-request-title}

`POST /<index>/_unfreeze`

//[[unfreeze-index-api-prereqs]]
//==== {api-prereq-title}

[[unfreeze-index-api-desc]]
==== {api-description-title}

When a frozen index is unfrozen, the index goes through the normal recovery 
process and becomes writeable again. See <<frozen-indices>> and <<freeze-index-api>>.

IMPORTANT: Freezing an index will close the index and reopen it within the same
API call. This causes primaries to not be allocated for a short amount of time
and causes the cluster to go red until the primaries are allocated again. This
limitation might be removed in the future.

[[unfreeze-index-api-path-parms]]
==== {api-path-parms-title}

`<index>`::
  (Required, string) Identifier for the index.

[[unfreeze-index-api-examples]]
==== {api-examples-title}

The following example freezes and unfreezes an index:

[source,console]
--------------------------------------------------
POST /my_index/_freeze
POST /my_index/_unfreeze
--------------------------------------------------
// TEST[s/^/PUT my_index\n/]