hbase 连接被拒绝

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我是 HBase 和 Hadoop 的新手.我已经完全设置了 HBase 并完美启动.现在，当我尝试使用 Java 客户端从 p1 连接到 HBase(HBase 设置在 p2 上)时，它抛出了一个奇怪的异常.

I am new to HBase and Hadoop. I have completely setup HBase and started perfectly. Now when I tried to connect from p1 to HBase (where HBase setup is on p2) using a Java client, then it is throwing a strange exception.

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.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$SendThread.run(ClientCnxn.java:1119) 12/04/17 14:36:39 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181 12/04/17 14:36:39 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567) at org.apache.zookeeper.ClientCnxn$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.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$SendThread.run(ClientCnxn.java:1119) 12/04/17 14:36:43 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181 12/04/17 14:36:43 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567) at org.apache.zookeeper.ClientCnxn$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.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$SendThread.run(ClientCnxn.java:1119) 12/04/17 14:36:45 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181 12/04/17 14:36:45 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567) at org.apache.zookeeper.ClientCnxn$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.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$SendThread.run(ClientCnxn.java:1119) 12/04/17 14:36:48 INFO zookeeper.ClientCnxn: Opening socket connection to server hbase.local/192.168.15.20:2181 12/04/17 14:36:48 WARN zookeeper.ClientCnxn: Session 0x0 for server null, unexpected error, closing socket connection and attempting reconnect java.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567) at org.apache.zookeeper.ClientCnxn$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/192.168.15.169:2181, initiating session 12/04/17 17:41:35 INFO zookeeper.ClientCnxn: Session establishment complete on server hbase.xyz/192.168.15.169:2181, sessionid = 0x136c00d59ac0009, negotiated timeout = 180000 12/04/17 17:41:36 INFO client.HConnectionManager$HConnectionImplementation: getMaster attempt 0 of 1 failed; no more retrying. java.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567) at org.apache.hadoop.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) at org.apache.hadoop.NetUtils.connect(NetUtils.java:604) at org.apache.hadoop.hbase.ipc.HBaseClient$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

推荐答案

我找到了解决方案.

只需从我的 /etc/hosts 中删除 localhost 条目.现在我的 localhost 条目就像 192.169.19.50 [这是我的 hbase IP] = localhost 而不是 127.0.0.1 localhost.

By just removing localhost entry from my /etc/hosts. Now my localhost entry is like 192.169.19.50 [which is my hbase IP] = localhost instead of 127.0.0.1 localhost.