API: add pending tasks count to cluster health
The number of current pending tasks is useful to detect and overloaded master. This commit adds it to the cluster health API. The complete list can be retrieved from the dedicated pending tasks API. It also adds rest tests for the cluster health variants. Closes #9877
This commit is contained in:
Boaz Leskes
parent
1ed6451229
commit
6953777c3a
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@ -10,8 +10,8 @@ timestamping.
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% curl 192.168.56.10:9200/_cat/health
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1384308967 18:16:07 foo green 3 3 3 3 0 0 0
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% curl '192.168.56.10:9200/_cat/health?v&ts=0'
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cluster status nodeTotal nodeData shards pri relo init unassign
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foo green 3 3 3 3 0 0 0
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cluster status nodeTotal nodeData shards pri relo init unassign tasks
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foo green 3 3 3 3 0 0 0 0
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--------------------------------------------------
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A common use of this command is to verify the health is consistent
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@ -21,11 +21,11 @@ across nodes:
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--------------------------------------------------
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% pssh -i -h list.of.cluster.hosts curl -s localhost:9200/_cat/health
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[1] 20:20:52 [SUCCESS] es3.vm
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1384309218 18:20:18 foo green 3 3 3 3 0 0 0
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1384309218 18:20:18 foo green 3 3 3 3 0 0 0 0
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[2] 20:20:52 [SUCCESS] es1.vm
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1384309218 18:20:18 foo green 3 3 3 3 0 0 0
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1384309218 18:20:18 foo green 3 3 3 3 0 0 0 0
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[3] 20:20:52 [SUCCESS] es2.vm
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1384309218 18:20:18 foo green 3 3 3 3 0 0 0
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1384309218 18:20:18 foo green 3 3 3 3 0 0 0 0
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--------------------------------------------------
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A less obvious use is to track recovery of a large cluster over
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@ -36,9 +36,9 @@ to track its progress is by using this command in a delayed loop:
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[source,shell]
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--------------------------------------------------
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% while true; do curl 192.168.56.10:9200/_cat/health; sleep 120; done
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1384309446 18:24:06 foo red 3 3 20 20 0 0 1812
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1384309566 18:26:06 foo yellow 3 3 950 916 0 12 870
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1384309686 18:28:06 foo yellow 3 3 1328 916 0 12 492
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1384309446 18:24:06 foo red 3 3 20 20 0 0 1812 0
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1384309566 18:26:06 foo yellow 3 3 950 916 0 12 870 0
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1384309686 18:28:06 foo yellow 3 3 1328 916 0 12 492 0
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1384309806 18:30:06 foo green 3 3 1832 916 4 0 0
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^C
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--------------------------------------------------
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@ -17,10 +17,13 @@ $ curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'
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"active_shards" : 10,
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"relocating_shards" : 0,
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"initializing_shards" : 0,
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"unassigned_shards" : 0
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"unassigned_shards" : 0,
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"number_of_pending_tasks" : 0
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}
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--------------------------------------------------
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coming[1.5.0, number of pending tasks was added in 1.5.0]
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The API can also be executed against one or more indices to get just the
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specified indices health:
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@ -0,0 +1,48 @@
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---
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"Help":
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- do:
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cat.health:
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help: true
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- match:
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$body: |
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/^ epoch .+ \n
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timestamp .+ \n
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cluster .+ \n
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status .+ \n
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node.total .+ \n
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node.data .+ \n
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shards .+ \n
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pri .+ \n
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relo .+ \n
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init .+ \n
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unassign .+ \n
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pending_tasks .+ \n
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$/
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---
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"Empty cluster":
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- do:
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cat.health: {}
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- match:
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$body: |
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/^
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( \d+ \s+ # epoch
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\d\d:\d\d:\d\d \s+ # timestamp
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\S+ \s+ # cluster
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\w+ \s+ # status
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\d+ \s+ # node.total
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\d+ \s+ # node.data
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\d+ \s+ # shards
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\d+ \s+ # pri
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\d+ \s+ # relo
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\d+ \s+ # init
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\d+ \s+ # unassign
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\d+ \s+ # pending_tasks
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\n
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)+
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$/
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@ -0,0 +1,57 @@
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---
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"cluster health basic test":
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- do:
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cluster.health: {}
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- is_true: cluster_name
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- is_false: timed_out
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- gte: { number_of_nodes: 1 }
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- gte: { number_of_data_nodes: 1 }
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- match: { active_primary_shards: 0 }
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- match: { active_shards: 0 }
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- match: { relocating_shards: 0 }
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- match: { initializing_shards: 0 }
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- match: { unassigned_shards: 0 }
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- gte: { number_of_pending_tasks: 0 }
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---
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"cluster health basic test, one index":
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- do:
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indices.create:
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index: test_index
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- do:
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cluster.health:
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wait_for_status: green
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- is_true: cluster_name
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- is_false: timed_out
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- gte: { number_of_nodes: 1 }
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- gte: { number_of_data_nodes: 1 }
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- gt: { active_primary_shards: 0 }
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- gt: { active_shards: 0 }
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- gte: { relocating_shards: 0 }
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- match: { initializing_shards: 0 }
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- match: { unassigned_shards: 0 }
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- gte: { number_of_pending_tasks: 0 }
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---
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"cluster health levels":
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- do:
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indices.create:
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index: test_index
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- do:
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cluster.health:
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wait_for_status: green
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level: indices
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- is_true: indices
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- is_false: indices.test_index.shards
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- do:
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cluster.health:
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level: shards
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- is_true: indices
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- is_true: indices.test_index.shards
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@ -21,6 +21,7 @@ package org.elasticsearch.action.admin.cluster.health;
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import com.google.common.collect.ImmutableList;
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import com.google.common.collect.Maps;
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import org.elasticsearch.ElasticsearchIllegalArgumentException;
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import org.elasticsearch.action.ActionResponse;
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import org.elasticsearch.cluster.ClusterState;
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import org.elasticsearch.cluster.metadata.IndexMetaData;
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@ -56,6 +57,7 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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int activePrimaryShards = 0;
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int initializingShards = 0;
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int unassignedShards = 0;
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int numberOfPendingTasks = 0;
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boolean timedOut = false;
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ClusterHealthStatus status = ClusterHealthStatus.RED;
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private List<String> validationFailures;
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@ -69,8 +71,12 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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this.validationFailures = validationFailures;
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}
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public ClusterHealthResponse(String clusterName, String[] concreteIndices, ClusterState clusterState) {
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public ClusterHealthResponse(String clusterName, String[] concreteIndices, ClusterState clusterState, int numberOfPendingTasks) {
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if (numberOfPendingTasks < 0) {
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throw new ElasticsearchIllegalArgumentException("pending task should be non-negative. got [" + numberOfPendingTasks + "]");
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}
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this.clusterName = clusterName;
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this.numberOfPendingTasks = numberOfPendingTasks;
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RoutingTableValidation validation = clusterState.routingTable().validate(clusterState.metaData());
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validationFailures = validation.failures();
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numberOfNodes = clusterState.nodes().size();
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@ -160,6 +166,10 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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return this.numberOfDataNodes;
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}
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public int getNumberOfPendingTasks() {
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return this.numberOfPendingTasks;
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}
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/**
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* <tt>true</tt> if the waitForXXX has timeout out and did not match.
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*/
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@ -180,6 +190,13 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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return indices.values().iterator();
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}
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public static ClusterHealthResponse readResponseFrom(StreamInput in) throws IOException {
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ClusterHealthResponse response = new ClusterHealthResponse();
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response.readFrom(in);
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return response;
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}
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@Override
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public void readFrom(StreamInput in) throws IOException {
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super.readFrom(in);
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@ -191,6 +208,7 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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unassignedShards = in.readVInt();
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numberOfNodes = in.readVInt();
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numberOfDataNodes = in.readVInt();
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numberOfPendingTasks = in.readInt();
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status = ClusterHealthStatus.fromValue(in.readByte());
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int size = in.readVInt();
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for (int i = 0; i < size; i++) {
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@ -219,6 +237,7 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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out.writeVInt(unassignedShards);
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out.writeVInt(numberOfNodes);
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out.writeVInt(numberOfDataNodes);
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out.writeInt(numberOfPendingTasks);
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out.writeByte(status.value());
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out.writeVInt(indices.size());
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for (ClusterIndexHealth indexHealth : this) {
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@ -252,6 +271,7 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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static final XContentBuilderString TIMED_OUT = new XContentBuilderString("timed_out");
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static final XContentBuilderString NUMBER_OF_NODES = new XContentBuilderString("number_of_nodes");
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static final XContentBuilderString NUMBER_OF_DATA_NODES = new XContentBuilderString("number_of_data_nodes");
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static final XContentBuilderString NUMBER_OF_PENDING_TASKS = new XContentBuilderString("number_of_pending_tasks");
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static final XContentBuilderString ACTIVE_PRIMARY_SHARDS = new XContentBuilderString("active_primary_shards");
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static final XContentBuilderString ACTIVE_SHARDS = new XContentBuilderString("active_shards");
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static final XContentBuilderString RELOCATING_SHARDS = new XContentBuilderString("relocating_shards");
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@ -273,6 +293,7 @@ public class ClusterHealthResponse extends ActionResponse implements Iterable<Cl
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builder.field(Fields.RELOCATING_SHARDS, getRelocatingShards());
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builder.field(Fields.INITIALIZING_SHARDS, getInitializingShards());
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builder.field(Fields.UNASSIGNED_SHARDS, getUnassignedShards());
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builder.field(Fields.NUMBER_OF_PENDING_TASKS, getNumberOfPendingTasks());
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String level = params.param("level", "cluster");
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boolean outputIndices = "indices".equals(level) || "shards".equals(level);
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@ -204,14 +204,7 @@ public class ClusterIndexHealth implements Iterable<ClusterShardHealth>, Streama
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ClusterShardHealth shardHealth = readClusterShardHealth(in);
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shards.put(shardHealth.getId(), shardHealth);
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}
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size = in.readVInt();
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if (size == 0) {
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validationFailures = ImmutableList.of();
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} else {
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for (int i = 0; i < size; i++) {
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validationFailures.add(in.readString());
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}
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}
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validationFailures = ImmutableList.copyOf(in.readStringArray());
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}
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@Override
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@ -35,10 +35,6 @@ import org.elasticsearch.indices.IndexMissingException;
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import org.elasticsearch.threadpool.ThreadPool;
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import org.elasticsearch.transport.TransportService;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicReference;
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/**
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*
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*/
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@ -168,12 +164,12 @@ public class TransportClusterHealthAction extends TransportMasterNodeReadOperati
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}
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private boolean validateRequest(final ClusterHealthRequest request, ClusterState clusterState, final int waitFor) {
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ClusterHealthResponse response = clusterHealth(request, clusterState);
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ClusterHealthResponse response = clusterHealth(request, clusterState, clusterService.numberOfPendingTasks());
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return prepareResponse(request, response, clusterState, waitFor);
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}
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private ClusterHealthResponse getResponse(final ClusterHealthRequest request, ClusterState clusterState, final int waitFor, boolean timedOut) {
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ClusterHealthResponse response = clusterHealth(request, clusterState);
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ClusterHealthResponse response = clusterHealth(request, clusterState, clusterService.numberOfPendingTasks());
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boolean valid = prepareResponse(request, response, clusterState, waitFor);
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assert valid || timedOut;
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// we check for a timeout here since this method might be called from the wait_for_events
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@ -257,7 +253,7 @@ public class TransportClusterHealthAction extends TransportMasterNodeReadOperati
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}
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private ClusterHealthResponse clusterHealth(ClusterHealthRequest request, ClusterState clusterState) {
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private ClusterHealthResponse clusterHealth(ClusterHealthRequest request, ClusterState clusterState, int numberOfPendingTasks) {
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if (logger.isTraceEnabled()) {
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logger.trace("Calculating health based on state version [{}]", clusterState.version());
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}
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@ -266,11 +262,11 @@ public class TransportClusterHealthAction extends TransportMasterNodeReadOperati
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concreteIndices = clusterState.metaData().concreteIndices(request.indicesOptions(), request.indices());
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} catch (IndexMissingException e) {
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// one of the specified indices is not there - treat it as RED.
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ClusterHealthResponse response = new ClusterHealthResponse(clusterName.value(), Strings.EMPTY_ARRAY, clusterState);
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ClusterHealthResponse response = new ClusterHealthResponse(clusterName.value(), Strings.EMPTY_ARRAY, clusterState, numberOfPendingTasks);
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response.status = ClusterHealthStatus.RED;
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return response;
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}
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return new ClusterHealthResponse(clusterName.value(), concreteIndices, clusterState);
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return new ClusterHealthResponse(clusterName.value(), concreteIndices, clusterState, numberOfPendingTasks);
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}
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}
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@ -113,4 +113,9 @@ public interface ClusterService extends LifecycleComponent<ClusterService> {
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*/
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List<PendingClusterTask> pendingTasks();
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/**
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* Returns the number of currently pending tasks.
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*/
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int numberOfPendingTasks();
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}
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@ -319,6 +319,12 @@ public class InternalClusterService extends AbstractLifecycleComponent<ClusterSe
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return pendingClusterTasks;
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}
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@Override
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public int numberOfPendingTasks() {
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return updateTasksExecutor.getNumberOfPendingTasks();
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}
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static abstract class TimedPrioritizedRunnable extends PrioritizedRunnable {
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private final long creationTime;
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protected final String source;
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@ -50,6 +50,12 @@ public class PrioritizedEsThreadPoolExecutor extends EsThreadPoolExecutor {
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return pending.toArray(new Pending[pending.size()]);
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}
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public int getNumberOfPendingTasks() {
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int size = current.size();
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size += getQueue().size();
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return size;
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}
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private void addPending(List<Runnable> runnables, List<Pending> pending, boolean executing) {
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for (Runnable runnable : runnables) {
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if (runnable instanceof TieBreakingPrioritizedRunnable) {
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@ -25,7 +25,10 @@ import org.elasticsearch.client.Client;
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import org.elasticsearch.common.Table;
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import org.elasticsearch.common.inject.Inject;
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import org.elasticsearch.common.settings.Settings;
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import org.elasticsearch.rest.*;
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import org.elasticsearch.rest.RestChannel;
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import org.elasticsearch.rest.RestController;
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import org.elasticsearch.rest.RestRequest;
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import org.elasticsearch.rest.RestResponse;
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import org.elasticsearch.rest.action.support.RestResponseListener;
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import org.elasticsearch.rest.action.support.RestTable;
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import org.joda.time.format.DateTimeFormat;
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@ -76,6 +79,7 @@ public class RestHealthAction extends AbstractCatAction {
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t.addCell("relo", "alias:r,shards.relocating,shardsRelocating;text-align:right;desc:number of relocating nodes");
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t.addCell("init", "alias:i,shards.initializing,shardsInitializing;text-align:right;desc:number of initializing nodes");
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t.addCell("unassign", "alias:u,shards.unassigned,shardsUnassigned;text-align:right;desc:number of unassigned shards");
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t.addCell("pending_tasks", "alias:pt,pendingTasks;text-align:right;desc:number of pending tasks");
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t.endHeaders();
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return t;
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@ -98,6 +102,7 @@ public class RestHealthAction extends AbstractCatAction {
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t.addCell(health.getRelocatingShards());
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t.addCell(health.getInitializingShards());
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t.addCell(health.getUnassignedShards());
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t.addCell(health.getNumberOfPendingTasks());
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t.endRow();
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return t;
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}
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@ -29,11 +29,15 @@ import org.elasticsearch.action.support.IndicesOptions;
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import org.elasticsearch.cluster.metadata.IndexMetaData;
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import org.elasticsearch.cluster.metadata.MetaData;
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import org.elasticsearch.cluster.routing.*;
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import org.elasticsearch.common.io.stream.BytesStreamInput;
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import org.elasticsearch.common.io.stream.BytesStreamOutput;
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import org.elasticsearch.index.shard.ShardId;
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import org.elasticsearch.test.ElasticsearchTestCase;
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import org.hamcrest.Matchers;
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import org.junit.Test;
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import java.io.IOException;
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import static org.hamcrest.CoreMatchers.equalTo;
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import static org.hamcrest.Matchers.empty;
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@ -177,7 +181,7 @@ public class ClusterHealthResponsesTests extends ElasticsearchTestCase {
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}
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@Test
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public void testClusterHealth() {
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public void testClusterHealth() throws IOException {
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ShardCounter counter = new ShardCounter();
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RoutingTable.Builder routingTable = RoutingTable.builder();
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MetaData.Builder metaData = MetaData.builder();
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@ -190,14 +194,26 @@ public class ClusterHealthResponsesTests extends ElasticsearchTestCase {
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routingTable.add(indexRoutingTable);
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}
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ClusterState clusterState = ClusterState.builder(ClusterName.DEFAULT).metaData(metaData).routingTable(routingTable).build();
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ClusterHealthResponse clusterHealth = new ClusterHealthResponse("bla", clusterState.metaData().concreteIndices(IndicesOptions.strictExpand(), (String[])null), clusterState);
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int pendingTasks = randomIntBetween(0, 200);
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ClusterHealthResponse clusterHealth = new ClusterHealthResponse("bla", clusterState.metaData().concreteIndices(IndicesOptions.strictExpand(), (String[]) null), clusterState, pendingTasks);
|
||||
logger.info("cluster status: {}, expected {}", clusterHealth.getStatus(), counter.status());
|
||||
|
||||
clusterHealth = maybeSerialize(clusterHealth);
|
||||
assertClusterHealth(clusterHealth, counter);
|
||||
assertThat(clusterHealth.getNumberOfPendingTasks(), Matchers.equalTo(pendingTasks));
|
||||
}
|
||||
|
||||
ClusterHealthResponse maybeSerialize(ClusterHealthResponse clusterHealth) throws IOException {
|
||||
if (randomBoolean()) {
|
||||
BytesStreamOutput out = new BytesStreamOutput();
|
||||
clusterHealth.writeTo(out);
|
||||
BytesStreamInput in = new BytesStreamInput(out.bytes());
|
||||
clusterHealth = ClusterHealthResponse.readResponseFrom(in);
|
||||
}
|
||||
return clusterHealth;
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testValidations() {
|
||||
public void testValidations() throws IOException {
|
||||
IndexMetaData indexMetaData = IndexMetaData.builder("test").settings(settings(Version.CURRENT)).numberOfShards(2).numberOfReplicas(2).build();
|
||||
ShardCounter counter = new ShardCounter();
|
||||
IndexRoutingTable indexRoutingTable = genIndexRoutingTable(indexMetaData, counter);
|
||||
|
|
@ -211,7 +227,8 @@ public class ClusterHealthResponsesTests extends ElasticsearchTestCase {
|
|||
metaData.put(indexMetaData, true);
|
||||
routingTable.add(indexRoutingTable);
|
||||
ClusterState clusterState = ClusterState.builder(ClusterName.DEFAULT).metaData(metaData).routingTable(routingTable).build();
|
||||
ClusterHealthResponse clusterHealth = new ClusterHealthResponse("bla", clusterState.metaData().concreteIndices(IndicesOptions.strictExpand(), (String[])null), clusterState);
|
||||
ClusterHealthResponse clusterHealth = new ClusterHealthResponse("bla", clusterState.metaData().concreteIndices(IndicesOptions.strictExpand(), (String[]) null), clusterState, 0);
|
||||
clusterHealth = maybeSerialize(clusterHealth);
|
||||
// currently we have no cluster level validation failures as index validation issues are reported per index.
|
||||
assertThat(clusterHealth.getValidationFailures(), Matchers.hasSize(0));
|
||||
}
|
||||
|
|
|
|||
|
|
@ -131,6 +131,11 @@ public class NoopClusterService implements ClusterService {
|
|||
return null;
|
||||
}
|
||||
|
||||
@Override
|
||||
public int numberOfPendingTasks() {
|
||||
return 0;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Lifecycle.State lifecycleState() {
|
||||
return null;
|
||||
|
|
|
|||
Loading…
Reference in New Issue