Hi,

I disabled Kerberos (setting Service HDFS => Configuration => Authentication type "simple") while all service are stopped. Afterwards I wanted to start service HDFS, but the Datanodes fail with the error:

Exception in secureMain
java.io.IOException: Failed on local exception: java.net.SocketException: Permission denied; Host Details : local host is: "hadoop-pg-4.cluster"; destination host is: (unknown):0;
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:763)
at org.apache.hadoop.ipc.Server.bind(Server.java:403)
at org.apache.hadoop.ipc.Server.bind(Server.java:375)
at org.apache.hadoop.hdfs.net.TcpPeerServer.<init>(TcpPeerServer.java:106)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initDataXceiver(DataNode.java:555)
at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:741)
at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:344)
at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1795)
at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1728)
at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1751)
at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1904)
at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1925)
Caused by: java.net.SocketException: Permission denied
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:444)
at sun.nio.ch.Net.bind(Net.java:436)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:214)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.apache.hadoop.ipc.Server.bind(Server.java:386)
... 10 more

on the datanodes theres is no hadoop related process running and nothing is listening on the required ports.

How do I successfully disable Kerberos and start my cluster afterwards?

CDH4.6 / CM4.8

regards, Gerd