Seems to be /etc/hosts mapping is missed b/w Namenode and DataNode machine..Please check hostmapping is done with NAT'd IP or not...
DataNode IP : 172.16.100.2 Namenode IP : 10.103.0.11<http://10.103.0.11> Need to configure with above IP's Thanks & Regards Brahma Reddy Battula ________________________________ From: xeon Mailinglist [[email protected]] Sent: Tuesday, February 18, 2014 5:32 PM To: [email protected] Subject: Set Hadoop MRv2 behind a NAT I am trying to set Hadoop MapReduce (MRv2) behind the NAT, but when I try to connect the Datanode, I get the error below. The hosts have 2 interfaces, one with a private address and another with the NAT address. To access the host with SSH, I must use an external IP, that NAT server will redirect. I want to access MRv2 from outside, and for that I tried to set an NAT'd IP, but the Datanado don't starts. How I set the MRv2 address in the configuration files, so that I can put Hadoop running? 2014-02-18 11:55:43,105 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for block pool Block pool BP-1302615141-172.16.100.1-1392724171451 (storage id DS-1964144366-172.16.100.2-50010-1392724135477) service to /10.103.0.11<http://10.103.0.11>: 9000 org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException): Datanode denied com munication with namenode: DatanodeRegistration(0.0.0.0, storageID=DS-1964144366-172.16.100.2-50010-1392724135477, infoPort=500 75, ipcPort=50020, storageInfo=lv=-40;cid=CID-f45cf960-4e55-420b-a20c-43f6edf1a847;nsid=1117538035;c=0) at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:631) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:3398) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:881) at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:90) at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:18295) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:454) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1014) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1741) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1737) at java.security.AccessController.doPrivileged(Native Method) :
