[HADOOP] hbase 연결이 거부되었습니다.

hbase 연결이 거부되었습니다.

HBase와 Hadoop을 처음 사용합니다. HBase를 완전히 설정하고 완벽하게 시작했습니다. 이제 Java 클라이언트를 사용하여 p1에서 HBase (HBase 설정이 p2에있는)에 연결하려고 시도했을 때 이상한 예외가 발생했습니다.

12/04/17 14:36:37 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=192.168.15.20:2181 sessionTimeout=180000 watcher=hconnection
12/04/17 14:36:38 INFO zookeeper.ClientCnxn: Opening socket connection to server /192.168.15.20:2181
12/04/17 14:36:38 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:39 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:39 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:41 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:41 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:43 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:43 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:44 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:44 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:45 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:45 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:47 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:47 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:48 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:48 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
    at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1119)
12/04/17 14:36:49 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181
12/04/17 14:36:49 INFO zookeeper.ZooKeeper: Session: 0x0 closed
org.apache.hadoop.hbase.ZooKeeperConnectionException: HBase is able to connect to ZooKeeper but the connection closes immediately. This could be a sign that the server has too many connections (30 is the default). Consider inspecting your ZK server logs for that error and then make sure you are reusing HBaseConfiguration as often as you can. See HTable's javadoc for more information.
    at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:155)
    at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getZooKeeperWatcher(HConnectionManager.java:1002)
    at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.setupZookeeperTrackers(HConnectionManager.java:304)
    at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.<init>(HConnectionManager.java:295)
    at org.apache.hadoop.hbase.client.HConnectionManager.getConnection(HConnectionManager.java:157)
    at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:90)
    at org.apache.hadoop.hbase.client.HBaseAdmin.checkHBaseAvailable(HBaseAdmin.java:1258)
    at HBaseDemo.main(HBaseDemo.java:55)
Caused by: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
    at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
    at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:809)
    at org.apache.zookeeper.ZooKeeper.exists(ZooKeeper.java:837)
    at org.apache.hadoop.hbase.zookeeper.ZKUtil.createAndFailSilent(ZKUtil.java:903)
    at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.<init>(ZooKeeperWatcher.java:133)
    ... 7 more
12/04/17 14:36:49 INFO zookeeper.ClientCnxn: EventThread shut down
Execution script exiting 

/04/17 17:41:35 INFO zookeeper.ZooKeeper: Client environment:user.name=xyz
12/04/17 17:41:35 INFO zookeeper.ZooKeeper: Client environment:user.home=/home/xyz
12/04/17 17:41:35 INFO zookeeper.ZooKeeper: Client environment:user.dir=/opt/xyz/hbase-sample
12/04/17 17:41:35 INFO zookeeper.ZooKeeper: Initiating client connection, connectString=192.168.15.169:2181 sessionTimeout=180000 watcher=hconnection
12/04/17 17:41:35 INFO zookeeper.ClientCnxn: Opening socket connection to server /192.168.15.169:2181
12/04/17 17:41:35 INFO zookeeper.ClientCnxn: Socket connection established to hbase.xyz.com/192.168.15.169:2181, initiating session
12/04/17 17:41:35 INFO zookeeper.ClientCnxn: Session establishment complete on server hbase.xyz.com/192.168.15.169:2181, sessionid = 0x136c00d59ac0009, negotiated timeout = 180000
12/04/17 17:41:36 INFO client.HConnectionManager$HConnectionImplementation: getMaster attempt 0 of 1 failed; no more retrying.
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:604)
at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:328)
at org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:883)
at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:750)
at org.apache.hadoop.hbase.ipc.HBaseRPC$Invoker.invoke(HBaseRPC.java:257)
at $Proxy4.getProtocolVersion(Unknown Source)
at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:419)
at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:393)
at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:444)
at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getMaster(HConnectionManager.java:360)
at org.apache.hadoop.hbase.client.HBaseAdmin.<init>(HBaseAdmin.java:94)
at org.apache.hadoop.hbase.client.HBaseAdmin.checkHBaseAvailable(HBaseAdmin.java:1258)
at HBaseDemo.main(HBaseDemo.java:55)
HBase is not running!
Execution script exiting 

해결법

1. ==============================

   1.해결책을 찾았습니다.

   해결책을 찾았습니다.

   내 / etc / hosts에서 localhost 항목을 제거하면됩니다. 이제 내 localhost 항목은 192.169.19.50 [내 hbase IP입니다] = 127.0.0.1 localhost 대신 localhost와 같습니다.

2. ==============================

   2.허용 된 대답은 효과가 있지만 부작용으로 만 작용할 수 있습니다.

   허용 된 대답은 효과가 있지만 부작용으로 만 작용할 수 있습니다.

   문제는 HBase가 외부 방향 인터페이스가 아닌 로컬 호스트에서 수신 대기중인 포트 (예 : 루프백)를 여는 것입니다. / etc / hosts에서 localhost 항목을 제거하면 HBase가 외부 인터페이스에 바인드됩니다. 단, localhost를 찾을 수 없기 때문입니다. 이것은 어떤 데몬이 합법적으로 localhost (lo를 통해)를 듣거나 연결하려고 할 때 문제가 될 수 있습니다.

   텔넷을 사용하여 localhost 또는 컴퓨터에 할당 된 IP를 통해 포트 60000에 연결하여이 문제가 발생했는지 테스트 할 수 있습니다. localhost (HBase가 바인딩 된 곳이기 때문에)가 아니라 IP에 연결할 수 있습니다.

   HBase conf에서 컴퓨터 이름을 사용하는 것이 좋습니다.

3. ==============================

   3.HBase에 대한 구성을 인스턴스화했다고 가정하면 hbase master, zookeeper quorum 및 znode parent를 설정하십시오. 이게 맘에 든다.

   HBase에 대한 구성을 인스턴스화했다고 가정하면 hbase master, zookeeper quorum 및 znode parent를 설정하십시오. 이게 맘에 든다.

   import org.apache.hadoop.hbase.HBaseConfiguration;
   
   public class CLASS_NAME{
       Configuration configuration = new HBaseConfiguration.Create();
       configuration.set(hbase master, "");
       configuration.set(zookeeper quorum, "");
       configuration.set(znode parent, "");  
   }
   

from https://stackoverflow.com/questions/10188889/hbase-connection-refused by cc-by-sa and MIT license