Docker中的Hadoopconfiguration – Datanode不能连接
我正在尝试构build一个dockerized hadoop系统。 我目前有问题，datanode的将不会连接到namenode。 对于一些背景：每个docker镜像都运行hadoopangular色和一个free-ipa客户端，并且所有的dns都使用免费的ipa。 所有hdfs服务正在hdfs用户uid：6001 gid：6001组：hadoop下运行。
这是我在namenode上看到的错误：
2014-10-16 15:52:28,066 WARN [IPC Server handler 4 on 8020] blockmanagement.DatanodeManager (DatanodeManager.java:registerDatanode(738)) - Unresolved datanode registration from 172.31.1.166 2014-10-16 15:52:28,067 ERROR [IPC Server handler 4 on 8020] security.UserGroupInformation (UserGroupInformation.java:doAs(1494)) - PriviledgedActionException as:hdfs (auth:SIMPLE) cause:org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException: Datanode denied communication with namenode: DatanodeRegistration(0.0.0.0, storageID=DS-300514933-172.31.1.166-50010-1413489147639, infoPort=50075, ipcPort=50020, storageInfo=lv=-47;cid=CID-41426277-e1f8-4154-8189-a0b556231333;nsid=900398376;c=0) 2014-10-16 15:52:28,068 INFO [IPC Server handler 4 on 8020] ipc.Server (Server.java:run(2075)) - IPC Server handler 4 on 8020, call org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.registerDatanode from 172.31.1.166:35452 Call#1 Retry#0: error: org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException: Datanode denied communication with namenode: DatanodeRegistration(0.0.0.0, storageID=DS-300514933-172.31.1.166-50010-1413489147639, infoPort=50075, ipcPort=50020, storageInfo=lv=-47;cid=CID-41426277-e1f8-4154-8189-a0b556231333;nsid=900398376;c=0) org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException: Datanode denied communication with namenode: DatanodeRegistration(0.0.0.0, storageID=DS-300514933-172.31.1.166-50010-1413489147639, infoPort=50075, ipcPort=50020, storageInfo=lv=-47;cid=CID-41426277-e1f8-4154-8189-a0b556231333;nsid=900398376;c=0) at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:739) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:3944) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:948) at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:90) at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:24079) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2053) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2047) 并在datanode上：
2014-10-16 15:52:28,030 INFO [DataNode: [file:/data/hdfs/dd] heartbeating to namenode.example.internal/172.31.1.51:8020] datanode.DataNode (BPServiceActor.java:register(618)) - Block pool BP-763144819-172.31.1.51-1413403838191 (storage id DS-300514933-172.31.1.166-50010-1413489147639) service to namenode.example.internal/172.31.1.51:8020 beginning handshake with NN 2014-10-16 15:52:28,083 FATAL [DataNode: [file:/data/hdfs/dd] heartbeating to namenode.example.internal/172.31.1.51:8020] datanode.DataNode (BPServiceActor.java:run(668)) - Initialization failed for block pool Block pool BP-763144819-172.31.1.51-1413403838191 (storage id DS-300514933-172.31.1.166-50010-1413489147639) service to namenode.example.internal/172.31.1.51:8020 org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException): Datanode denied communication with namenode: DatanodeRegistration(0.0.0.0, storageID=DS-300514933-172.31.1.166-50010-1413489147639, infoPort=50075, ipcPort=50020, storageInfo=lv=-47;cid=CID-41426277-e1f8-4154-8189-a0b556231333;nsid=900398376;c=0) at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.registerDatanode(DatanodeManager.java:739) at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.registerDatanode(FSNamesystem.java:3944) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.registerDatanode(NameNodeRpcServer.java:948) at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.registerDatanode(DatanodeProtocolServerSideTranslatorPB.java:90) at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:24079) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2053) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2047) at org.apache.hadoop.ipc.Client.call(Client.java:1347) at org.apache.hadoop.ipc.Client.call(Client.java:1300) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206) at com.sun.proxy.$Proxy9.registerDatanode(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102) at com.sun.proxy.$Proxy9.registerDatanode(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB.registerDatanode(DatanodeProtocolClientSideTranslatorPB.java:146) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.register(BPServiceActor.java:623) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:225) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:664) at java.lang.Thread.run(Thread.java:744)
我想到了！
hadoop同时具有正向和反向dns是非常重要的，而且我没有创build反向dnslogging。
确保做到这一点！