bind(2) error:Permission denied when trying to bind to '/var/run/hdfs-sockets/dn’ ——datanode

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1、 datanode 起不来

2017-06-13 14:58:06,352 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: registered UNIX signal handlers for [TERM, HUP, INT]2017-06-13 14:58:07,518 INFO org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties2017-06-13 14:58:07,599 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).2017-06-13 14:58:07,599 INFO org.apache.hadoop.metrics2.impl.MetricsSystemImpl: DataNode metrics system started2017-06-13 14:58:07,609 INFO org.apache.hadoop.hdfs.server.datanode.BlockScanner: Initialized block scanner with targetBytesPerSec 10485762017-06-13 14:58:07,611 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: File descriptor passing is enabled.2017-06-13 14:58:07,613 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Configured hostname is Vm912017-06-13 14:58:07,723 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Starting DataNode with maxLockedMemory = 42949672962017-06-13 14:58:07,798 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Opened streaming server at localhost:500102017-06-13 14:58:07,801 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Balancing bandwith is 10485760 bytes/s2017-06-13 14:58:07,804 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Number threads for balancing is 52017-06-13 14:58:07,807 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Shutdown complete.2017-06-13 14:58:07,814 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMainjava.net.BindException: bind(2) error: Permission denied when trying to bind to '/var/run/hdfs-sockets/dn'        at org.apache.hadoop.net.unix.DomainSocket.bind0(Native Method)        at org.apache.hadoop.net.unix.DomainSocket.bindAndListen(DomainSocket.java:191)        at org.apache.hadoop.hdfs.net.DomainPeerServer.<init>(DomainPeerServer.java:40)        at org.apache.hadoop.hdfs.server.datanode.DataNode.getDomainPeerServer(DataNode.java:970)        at org.apache.hadoop.hdfs.server.datanode.DataNode.initDataXceiver(DataNode.java:936)        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1144)        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:453)        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2402)        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2289)        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2336)        at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2513)        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2537)2017-06-13 14:58:07,837 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1***********解决办法*********[root@Vm91 hadoop-hdfs]# chown hdfs:root -R /var/run/hdfs-sockets
启动成功
这里写图片描述
待续……
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