hdfs - Filed to start data node in Hadoop Cluster -


i trying installing cdh 4.6 in cluster of 3 nodes. 1 data node out of 3 not able start @ all. tried searching , solving possible ways, failed. please me in solving this. below log. 

5:49:10.708 pm  fatal   org.apache.hadoop.hdfs.server.datanode.datanode  exception in securemain java.io.ioexception: path component: '/' world-writable.  permissions 0777.  please fix or select different socket path.     @ org.apache.hadoop.net.unix.domainsocket.validatesocketpathsecurity0(native method)     @ org.apache.hadoop.net.unix.domainsocket.bindandlisten(domainsocket.java:191)     @ org.apache.hadoop.hdfs.net.domainpeerserver.<init>(domainpeerserver.java:42)     @ org.apache.hadoop.hdfs.server.datanode.datanode.getdomainpeerserver(datanode.java:603)     @ org.apache.hadoop.hdfs.server.datanode.datanode.initdataxceiver(datanode.java:570)     @ org.apache.hadoop.hdfs.server.datanode.datanode.startdatanode(datanode.java:741)     @ org.apache.hadoop.hdfs.server.datanode.datanode.<init>(datanode.java:344)     @ org.apache.hadoop.hdfs.server.datanode.datanode.makeinstance(datanode.java:1795)     @ org.apache.hadoop.hdfs.server.datanode.datanode.instantiatedatanode(datanode.java:1728)     @ org.apache.hadoop.hdfs.server.datanode.datanode.createdatanode(datanode.java:1751)     @ org.apache.hadoop.hdfs.server.datanode.datanode.securemain(datanode.java:1904)     @ org.apache.hadoop.hdfs.server.datanode.datanode.main(datanode.java:1925) 5:49:10.723 pm  info    org.apache.hadoop.util.exitutil  exiting status 1 5:49:10.725 pm  info    org.apache.hadoop.hdfs.server.datanode.datanode  shutdown_msg:  /************************************************************ shutdown_msg: shutting down datanode @ xx.xx.xxx.xxxxx

have confirmed root filesystem not set 777 permissions?

this should correct permissions root(/):

[root@server ~]# ls -ald / dr-xr-xr-x. 29 root root 4096 feb 20 13:53 /

if see this, root filesystems need chmod 555:

[root@server ~]# ls -ald / drwxrwxrwx. 29 root root 4096 feb 20 13:53 /

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