hadoop学习时遇到的问题：启动HBASE，出现 Caused by: java.net.ConnectException: 拒绝连接

心已赠人 2023-06-29 02:50 27阅读 0赞

2020-01-10 11:20:34,210 FATAL [centos103:16000.activeMasterManager] master.HMaster: Unhandled exception. Starting shutdown.
    java.net.ConnectException: Call From master/192.168.29.133 to master:9820 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see:  http://wiki.apache.org/hadoop/ConnectionRefused
            at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
            at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
            at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
            at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:792)
            at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:732)
            at org.apache.hadoop.ipc.Client.call(Client.java:1479)
            at org.apache.hadoop.ipc.Client.call(Client.java:1412)
            at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
            at com.sun.proxy.$Proxy16.setSafeMode(Unknown Source)
            at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.setSafeMode(ClientNamenodeProtocolTranslatorPB.java:666)
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
            at java.lang.reflect.Method.invoke(Method.java:498)
            at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:191)
            at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
            at com.sun.proxy.$Proxy17.setSafeMode(Unknown Source)
            at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
            at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
            at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
            at java.lang.reflect.Method.invoke(Method.java:498)
            at org.apache.hadoop.hbase.fs.HFileSystem$1.invoke(HFileSystem.java:302)
            at com.sun.proxy.$Proxy18.setSafeMode(Unknown Source)
            at org.apache.hadoop.hdfs.DFSClient.setSafeMode(DFSClient.java:2596)
            at org.apache.hadoop.hdfs.DistributedFileSystem.setSafeMode(DistributedFileSystem.java:1223)
            at org.apache.hadoop.hdfs.DistributedFileSystem.setSafeMode(DistributedFileSystem.java:1207)
            at org.apache.hadoop.hbase.util.FSUtils.isInSafeMode(FSUtils.java:525)
            at org.apache.hadoop.hbase.util.FSUtils.waitOnSafeMode(FSUtils.java:971)
            at org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:428)
            at org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:152)
            at org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:127)
            at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:714)
            at org.apache.hadoop.hbase.master.HMaster.access$600(HMaster.java:198)
            at org.apache.hadoop.hbase.master.HMaster$2.run(HMaster.java:1868)
            at java.lang.Thread.run(Thread.java:748)
    Caused by: java.net.ConnectException: 拒绝连接
            at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
            at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
            at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
            at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:531)
            at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:495)
            at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:614)
            at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:712)
            at org.apache.hadoop.ipc.Client$Connection.access$2900(Client.java:375)
            at org.apache.hadoop.ipc.Client.getConnection(Client.java:1528)
            at org.apache.hadoop.ipc.Client.call(Client.java:1451)
            ... 29 more

主要是这里

> java.net.ConnectException: Call From master/192.168.29.133 to master:9820 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

参考文章

> https://blog.csdn.net/qq\_34668848/article/details/94657312

据说是HBASE的配置文件hbase-site.xml和hadf的core-site.xml配置端口号不一致引起的。我之前改了一下我的ip地址。并且对比了一下别人的core-site.xml

<configuration>
        <property>
            <name>fs.defaultFS</name>
            <value>hdfs://master:9820</value>
        </property>
    
    </configuration>

而我的是

<configuration>
        <property>
            <name>fs.default.name</name>
            <value>hdfs://master:9820</value>
        </property>
    
    </configuration>

这两个是不是一样的我不太清楚，但是我把别人的这个也加进去了，即

<configuration>
        <property>
            <name>fs.defaultFS</name>
            <value>hdfs://master:9820</value>
        </property>
    
    </configuration>

然后我再次重启HBASE，还是报这个错。  
最后我重启一下hadoop，进入hadoop安装目录下的bin文件夹

./stop-all.sh
    ./strat-all.sh

然后又再次重启hbase，就可以成功启动HBASE了，可以正常使用HBase shell进行创建表了