??? 搭建好hadoop集群之后，運行start-all.sh腳本，發(fā)現(xiàn)有如下報錯

starting namenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-namenode-we-home-server.out homeserver: starting datanode, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-datanode-homeserver.out we-home-server: starting secondarynamenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-secondarynamenode-we-home-server.out we-home-server: Exception in thread "main" java.net.BindException: Address already in use we-home-server: at sun.nio.ch.Net.bind(Native Method) we-home-server: at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:124) we-home-server: at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59) we-home-server: at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216) we-home-server: at org.apache.hadoop.http.HttpServer.start(HttpServer.java:581) we-home-server: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode$1.run(SecondaryNameNode.java:216) we-home-server: at org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode$1.run(SecondaryNameNode.java:190) we-home-server: at java.security.AccessController.doPrivileged(Native Method) we-home-server: at javax.security.auth.Subject.doAs(Subject.java:396) starting jobtracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-jobtracker-we-home-server.out

log中說明錯誤?Address already in use，這是因為有上次的運行datanode的進程沒有終止，解決方法，

netstat -antup

運行這個命令后，找出占用50030端口的那個進程的PID，然后將其終止

kill -9 <PID>

然后，再重新啟動hadoop集群，沒有報錯。

hadoop@we-home-server:/usr/local/hadoop/bin$ ./start-all.sh starting namenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-namenode-we-home-server.out homeserver: starting datanode, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-datanode-homeserver.out we-home-server: starting secondarynamenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-secondarynamenode-we-home-server.out starting jobtracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-jobtracker-we-home-server.out homeserver: starting tasktracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-hadoop-tasktracker-homeserver.out hadoop@we-home-server:/usr/local/hadoop/bin$

?

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轉(zhuǎn)載于:https://www.cnblogs.com/lxs0731/archive/2013/03/17/2964913.html

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