HBase报错:java.net.ConnectException: Connection refused
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问题描述:
standalone模式安装HBase,安装步骤参考:http://archive.cloudera.com/cdh5/cdh/5/hbase-0.98.6-cdh5.3.3/book/quickstart.html
启动HBase,查看日志信息发现报错,错误大致意思为Hadoop连接拒绝,或者由此导致zookeeper连接拒绝
报错信息:
2015-12-29 10:25:21,165 FATAL [M:0;hadoop-yarn:46823] master.HMaster: Unhandled exception. Starting shutdown.java.net.ConnectException: Call From hadoop-yarn.cloudyhadoop.com/192.168.1.20 to localhost:8020 failed on connection exception:
java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:529)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:493)
at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:606)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:700)
at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:367)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1463)
at org.apache.hadoop.ipc.Client.call(Client.java:1382)
2015-12-29 10:25:22,685 WARN [RS:0;hadoop-yarn:47199-SendThread(localhost:2181)] zookeeper.ClientCnxn: Session 0x151eb8db6de0001 for server null, unexpected error, closing socket connection and attempting reconnect
java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:739)
at org.apache.zookeeper.ClientCnxnSocketNIO.doTransport(ClientCnxnSocketNIO.java:350)
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1081)
解决方案:
若/etc/profile未配置hadoop环境,需要在conf/hbase-env.sh 配置hadoop环境变量:
export HADOOP_HOME=/opt/modules/hadoop-2.5.0-cdh5.3.3
或者由于hbase-site.xml配置文件出现语法错误,hadoop的share/hadoop多包或缺包。
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