我有一台Hadoop 2.5集群的两台机器,在一台机器上,数据节点出现故障UnregisteredNodeException
.这是主配置:
master$ jps 5036 Jps 7145 DataNode 918 ResourceManager 7338 SecondaryNameNode 6986 NameNode 1105 NodeManager
对于奴隶
slave$ jps 15950 Jps 26650 NodeManager
以下是来自以下内容的完整堆栈跟踪hadoop-hadoop-datanode-slave.log
:
2014-10-23 19:43:46,895 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Block pool BP-8947225-127.0.1.1-1409591980216 (Datanode Uuid 5c9f00ab-1d75-4706-8ed8-bfb449174c9a) service to hadoop-server/192.168.2.72:8020 is shutting down org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.UnregisteredNodeException): Data node DatanodeRegistration(192.168.2.73, datanodeUuid=5c9f00ab-1d75-4706-8ed8-bfb449174c9a, infoPort=50075, ipcPort=50020, storageInfo=lv=-55;cid=CID-ab378c59-62ed-44ff-8814-03b5b733b6fa;nsid=1290295317;c=0) is attempting to report storage ID 5c9f00ab-1d75-4706-8ed8-bfb449174c9a. Node 192.168.2.72:50010 is expected to serve this storage. at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeManager.getDatanode(DatanodeManager.java:475) at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReport(BlockManager.java:1702) at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.blockReport(NameNodeRpcServer.java:1049) at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.blockReport(DatanodeProtocolServerSideTranslatorPB.java:152) at org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:28061) at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585) at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013) at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614) at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007) at org.apache.hadoop.ipc.Client.call(Client.java:1411) at org.apache.hadoop.ipc.Client.call(Client.java:1364) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206) at com.sun.proxy.$Proxy11.blockReport(Unknown Source) at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) 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:187) at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102) at com.sun.proxy.$Proxy11.blockReport(Unknown Source) at org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB.blockReport(DatanodeProtocolClientSideTranslatorPB.java:214) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.blockReport(BPServiceActor.java:476) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.offerService(BPServiceActor.java:699) at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:834) at java.lang.Thread.run(Thread.java:745)
当我hdfs dfsadmin -report
在两台机器中的任何一台上发出时,我看到以下内容:
14/10/31 10:48:34 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Configured Capacity: 12547440640 (11.69 GB) Present Capacity: 4710391808 (4.39 GB) DFS Remaining: 4504489984 (4.20 GB) DFS Used: 205901824 (196.36 MB) DFS Used%: 4.37% Under replicated blocks: 4 Blocks with corrupt replicas: 0 Missing blocks: 0 ------------------------------------------------- Live datanodes (1): Name: 192.168.2.72:50010 (hadoop-server) Hostname: hadoop-server Decommission Status : Normal Configured Capacity: 12547440640 (11.69 GB) DFS Used: 205901824 (196.36 MB) Non DFS Used: 7837048832 (7.30 GB) DFS Remaining: 4504489984 (4.20 GB) DFS Used%: 1.64% DFS Remaining%: 35.90% Configured Cache Capacity: 0 (0 B) Cache Used: 0 (0 B) Cache Remaining: 0 (0 B) Cache Used%: 100.00% Cache Remaining%: 0.00% Xceivers: 1 Last contact: Fri Oct 31 10:48:35 CET 2014
此外,我可以从资源管理器Web UI中查看/监视从属计算机,因此导致此故障的原因以及如何解决此问题?
我实际上复制了一个vm来创建从机,导致所有节点都具有相同的UUID.所以(如这里所讨论的)我关闭了奴隶中的服务:
hadoop-daemon.sh stop datanode yarn-daemon.sh stop nodemanager
然后,我删除了datanode和namenode目录(分别在dfs.datanode.data.dir
和中dfs.namenode.data.dir
).然后,重新启动datanode和namenode.现在我可以看到datanode启动并运行:
$ jps 17135 NodeManager 17290 DataNode 18221 Jps