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[英]How to get the cluster state or index metadata using RestHighLevelClient?
[英]How to get the cluster state of Solr Cloud using the solrZkClient and zkStateReader?
我已經在我的本地系統上下載並安裝了Solr(SolrCloud)v.4.10.3,並且可以毫無問題地運行它,索引文檔,與其Web UI交互。 我還可以使用以下命令行與其ZooKeeper進行交互:
zkcli.sh -z localhost:9983 -cmd get /clusterstate.json
它會返回有關SolrCloud的信息。 現在,我正在嘗試使用Java以編程方式獲取類似的信息。
我嘗試過以下方法:
SolrZkClient solrZkClient = new SolrZkClient("localhost:9983", 4000);
ZkStateReader zkStateReader = new ZkStateReader(solrZkClient);
System.err.println(zkStateReader.getClusterState());
System.err.println(zkStateReader.getClusterState().getLiveNodes());
但不幸的是, zkStateReader.getClusterState()返回null
。
在日志輸出中,我看到以下內容:
2015-04-23 15:19:04 INFO ZooKeeper:100 - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT
2015-04-23 15:19:04 INFO ZooKeeper:100 - Client environment:host.name=emre-ubuntu
2015-04-23 15:19:04 INFO ZooKeeper:100 - Client environment:java.version=1.8.0_25
2015-04-23 15:19:04 INFO ZooKeeper:100 - Client environment:java.vendor=Oracle Corporation
2015-04-23 15:19:04 INFO ZooKeeper:100 - Client environment:java.home=/usr/lib/jvm/java-8-oracle/jre
...
2015-04-23 15:19:04 INFO ZooKeeper:438 - Initiating client connection, connectString=localhost:9983 sessionTimeout=4000 watcher=org.apache.solr.common.cloud.ConnectionManager@3b22cdd0
2015-04-23 15:19:04 INFO ConnectionManager:207 - Waiting for client to connect to ZooKeeper
2015-04-23 15:19:04 INFO ClientCnxn:966 - Opening socket connection to server localhost/127.0.0.1:9983. Will not attempt to authenticate using SASL (unknown error)
2015-04-23 15:19:04 INFO ClientCnxn:849 - Socket connection established to localhost/127.0.0.1:9983, initiating session
2015-04-23 15:19:04 INFO ClientCnxn:1207 - Session establishment complete on server localhost/127.0.0.1:9983, sessionid = 0x14ce5f89eec000d, negotiated timeout = 4000
2015-04-23 15:19:04 INFO ConnectionManager:102 - Watcher org.apache.solr.common.cloud.ConnectionManager@3b22cdd0 name:ZooKeeperConnection Watcher:localhost:9983 got event WatchedEvent state:SyncConnected type:None path:null path:null type:None
2015-04-23 15:19:04 INFO ConnectionManager:225 - Client is connected to ZooKeeper
null
我錯過了什么嗎? 如何使用Java獲取該信息?
我看到你正在嘗試使用java來獲得solrcloud集群狀態。你可以試試這樣的東西..
CloudSolrServer server = new CloudSolrServer("192.112.21.21:9983");
server.setZkConnectTimeout(15*60*1000);
server.setZkClientTimeout(15*60*1000);
server.setParser(new BinaryResponseParser());
server.setRequestWriter(new BinaryRequestWriter());
CollectionAdminRequest adminRequest = new CollectionAdminRequest();
adminRequest.setAction(CollectionAction.CLUSTERSTATUS);
CollectionAdminResponse adminResponse = adminRequest.process(server);
System.out.println(adminResponse.toString());
對於帶有2shards的集合,輸出將是這樣的。
{
responseHeader={
status=0,
QTime=1650
},
cluster={
collections={
collection1={
shards={
shard1={
range=80000000-ffffffff,
state=active,
replicas={
core_node2={
state=active,
core=collection1_shard1_replica1,
node_name=192.112.21.21: 8983_solr,
base_url=http: //192.112.21.21: 8983/solr,
leader=true
}
}
},
shard2={
range=0-7fffffff,
state=active,
replicas={
core_node1={
state=active,
core=collection1_shard2_replica1,
node_name=192.112.21.21: 8984_solr,
base_url=http: //192.112.21.21: 8984/solr,
leader=true
}
}
}
},
maxShardsPerNode=1,
router={
name=compositeId
},
replicationFactor=1,
autoAddReplicas=false,
autoCreated=true
}
},
live_nodes=[
192.112.21.21: 8983_solr,
192.112.21.21: 8984_solr
]
} }
@Vijay不推薦使用CloudSolrServer。 而是使用CloudSolrClient。 謝謝你的提示。 從那里我達成了這個解決方案。 謝謝。
如果您沒有解決這個問題,我會為您提供解決方案。 我也需要這個方法來檢查來自其他系統的副本。
final CloudSolrClient server = new CloudSolrClient("localhost:2181");
try {
//probably this is the line that missed from your code...
server.connect();
final ClusterState clusterState = server.getZkStateReader().getClusterState();
final DocCollection collection = clusterState.getCollection("collection1");
//EVRIKA! collection object
// and get the leader of the collection...pretty easy.
Replica leader = clusterState.getLeader("collection1", "shard1");
} catch (Exception e) {
// do your stuff
} finally {
server.close();
}
我希望我最近的回答對其他人有用。
美好的一天。
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