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[[cluster-pending]]
== Pending cluster tasks
The pending cluster tasks API returns a list of any cluster-level changes
(e.g. create index, update mapping, allocate or fail shard) which have not yet
been executed.
NOTE: This API returns a list of any pending updates to the cluster state. These are distinct from the tasks reported by the
<<tasks,Task Management API>> which include periodic tasks and tasks initiated by the user, such as node stats, search queries, or create
index requests. However, if a user-initiated task such as a create index command causes a cluster state update, the activity of this task
might be reported by both task api and pending cluster tasks API.
[source,js]
--------------------------------------------------
$ curl -XGET 'http://localhost:9200/_cluster/pending_tasks'
--------------------------------------------------
Usually this will return an empty list as cluster-level changes are usually
fast. However if there are tasks queued up, the output will look something
like this:
[source,js]
--------------------------------------------------
{
"tasks": [
{
"insert_order": 101,
"priority": "URGENT",
"source": "create-index [foo_9], cause [api]",
"time_in_queue_millis": 86,
"time_in_queue": "86ms"
},
{
"insert_order": 46,
"priority": "HIGH",
"source": "shard-started ([foo_2][1], node[tMTocMvQQgGCkj7QDHl3OA], [P], s[INITIALIZING]), reason [after recovery from shard_store]",
"time_in_queue_millis": 842,
"time_in_queue": "842ms"
},
{
"insert_order": 45,
"priority": "HIGH",
"source": "shard-started ([foo_2][0], node[tMTocMvQQgGCkj7QDHl3OA], [P], s[INITIALIZING]), reason [after recovery from shard_store]",
"time_in_queue_millis": 858,
"time_in_queue": "858ms"
}
]
}
--------------------------------------------------
|
