--
:api: health
:request: ClusterHealthRequest
:response: ClusterHealthResponse
--

[id="{upid}-{api}"]
=== Cluster Health API

The Cluster Health API allows getting cluster health.

[id="{upid}-{api}-request"]
==== Cluster Health Request

A +{request}+:

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There are no required parameters. By default, the client will check all indices and will not wait
for any events.

==== Indices

Indices which should be checked can be passed in the constructor:

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Or using the corresponding setter method:

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==== Other parameters

Other parameters can be passed only through setter methods:

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<1> Timeout for the request as a `TimeValue`. Defaults to 30 seconds
<2> As a `String`

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<1> Timeout to connect to the master node as a `TimeValue`. Defaults to the same as `timeout`
<2> As a `String`

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<1> The status to wait (e.g. `green`, `yellow`, or `red`). Accepts a `ClusterHealthStatus` value.
<2> Using predefined method

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<1> The priority of the events to wait for. Accepts a `Priority` value.

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<1> The level of detail of the returned health information. Accepts a +{request}.Level+ value.
Default value is `cluster`.

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<1> Wait for 0 relocating shards. Defaults to `false`

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<1> Wait for 0 initializing shards. Defaults to `false`

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<1> Wait for `N` nodes in the cluster. Defaults to `0`
<2> Using `>=N`, `<=N`, `>N` and `<N` notation
<3> Using `ge(N)`, `le(N)`, `gt(N)`, `lt(N)` notation

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<1> Wait for all shards to be active in the cluster
<2> Wait for `N` shards to be active in the cluster

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include-tagged::{doc-tests-file}[{api}-request-local]
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<1> Non-master node can be used for this request. Defaults to `false`

include::../execution.asciidoc[]

[id="{upid}-{api}-response"]
==== Cluster Health Response

The returned +{response}+ contains the next information about the
cluster:

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<1> Name of the cluster
<2> Cluster status (`green`, `yellow` or `red`)

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<1> Whether request was timed out while processing
<2> Status of the request (`OK` or `REQUEST_TIMEOUT`). Other errors will be thrown as exceptions

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<1> Number of nodes in the cluster
<2> Number of data nodes in the cluster

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include-tagged::{doc-tests-file}[{api}-response-shards]
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<1> Number of active shards
<2> Number of primary active shards
<3> Number of relocating shards
<4> Number of initializing shards
<5> Number of unassigned shards
<6> Number of unassigned shards that are currently being delayed
<7> Percent of active shards

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<1> Maximum wait time of all tasks in the queue
<2> Number of currently pending tasks
<3> Number of async fetches that are currently ongoing

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include-tagged::{doc-tests-file}[{api}-response-indices]
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<1> Detailed information about indices in the cluster

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include-tagged::{doc-tests-file}[{api}-response-index]
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<1> Detailed information about a specific index

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include-tagged::{doc-tests-file}[{api}-response-shard-details]
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<1> Detailed information about a specific shard