[role="xpack"]
[testenv="platinum"]
[[ml-open-job]]
=== Open jobs API
++++
<titleabbrev>Open jobs</titleabbrev>
++++

Opens one or more jobs.
A job must be opened in order for it to be ready to receive and analyze data.
A job can be opened and closed multiple times throughout its lifecycle.

[[ml-open-job-request]]
==== {api-request-title}

`POST _ml/anomaly_detectors/{job_id}/_open`

[[ml-open-job-desc]]
==== {api-description-title}

When you open a new job, it starts with an empty model.

When you open an existing job, the most recent model state is automatically loaded.
The job is ready to resume its analysis from where it left off, once new data is received.

[[ml-open-job-path-parms]]
==== {api-path-parms-title}

`job_id` (required)::
(string) Identifier for the job

[[ml-open-job-request-body]]
==== {api-request-body-title}

`timeout`::
  (time) Controls the time to wait until a job has opened.
  The default value is 30 minutes.

[[ml-open-job-prereqs]]
==== {api-prereq-title}

You must have `manage_ml`, or `manage` cluster privileges to use this API.
For more information, see
{stack-ov}/security-privileges.html[Security privileges].

[[ml-open-job-example]]
==== {api-examples-title}

The following example opens the `total-requests` job and sets an optional
property:

[source,js]
--------------------------------------------------
POST _ml/anomaly_detectors/total-requests/_open
{
  "timeout": "35m"
}
--------------------------------------------------
// CONSOLE
// TEST[skip:setup:server_metrics_job]

When the job opens, you receive the following results:
[source,js]
----
{
  "opened": true
}
----
// TESTRESPONSE