Question

hadoop搭建，namenode无法启动，bind错误

按照教程把hadoop搭建以后，单机模式和伪分布式模式都没有问题，但是分布式时一直出现如下问题：

1、在格式化namenode以后，运行sbin/start-dfs.sh和sbin/start-yarn.sh，然后jps查看，namenode并没有启动，而datanode那边没有问题。
log信息如下：
2015-05-04 16:38:08,110 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Stopping services started for active state
...
2015-05-04 16:38:08,130 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Stopping services started for standby state
2015-05-04 16:38:08,165 INFO org.mortbay.log: Stopped HttpServer2$SelectChannelConnectorWithSafeStartup@0.0.0.0:50070
2015-05-04 16:38:08,177 WARN org.apache.hadoop.http.HttpServer2: HttpServer Acceptor: isRunning is false. Rechecking.
2015-05-04 16:38:08,177 WARN org.apache.hadoop.http.HttpServer2: HttpServer Acceptor: isRunning is false
2015-05-04 16:38:08,277 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Stopping NameNode metrics system...
2015-05-04 16:38:08,278 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system stopped.
2015-05-04 16:38:08,278 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: NameNode metrics system shutdown complete.
2015-05-04 16:38:08,279 FATAL org.apache.hadoop.hdfs.server.namenode.NameNode: Failed to start namenode.
java.net.BindException: Problem binding to [52.74.144.149:9000] java.net.BindException: Cannot assign requested address; For more details see: http://wiki.apache.org/hadoop/BindException

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Answer 1

看看namenode到datanode的无密码ssh访问有没有问题。

追问

没有问题的
各种访问都没有问题，而且端口也没有被占用