端口被其他进程占用导致hadoop namenode,datanode,jobTracker,taskTracker,secondnamenode无法启动

最新推荐文章于 2024-04-24 10:36:10 发布

SprintfWater

最新推荐文章于 2024-04-24 10:36:10 发布

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本文记录了一次Hadoop集群中Namenode无法启动的问题排查过程，通过日志发现端口冲突导致启动失败，并给出了具体的解决步骤。

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namenode 无法启动，查看日志显示：

BindException: Problem binding to cs-01.localhost.localdomain/192.168.0.4:9001 : Address already in use

2012-06-10 20:43:03,004 INFO org.apache.hadoop.mapred.JobTracker: Starting jobtracker with owner as hadoop
2012-06-10 20:43:03,095 FATAL org.apache.hadoop.mapred.JobTracker: java.net.BindException: Problem binding to cs-01.localhost.localdomain/192.168.0.4:9001 : Address already in use
        at org.apache.hadoop.ipc.Server.bind(Server.java:226)
        at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:300)
        at org.apache.hadoop.ipc.Server.<init>(Server.java:1478)
        at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:505)
        at org.apache.hadoop.ipc.RPC.getServer(RPC.java:466)
        at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:2288)
        at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:2171)
        at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:300)
        at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:291)
        at org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:4956)
Caused by: java.net.BindException: Address already in use
        at sun.nio.ch.Net.bind(Native Method)
        at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:126)
        at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
        at org.apache.hadoop.ipc.Server.bind(Server.java:224)
        ... 9 more

表明端口被占用，所以用：netstat -tunlp | grep java