目錄
從節點JPS沒有dataNode的解決辦法
查看logs日志文件，找到Hadoop的安裝目錄下logs目錄，用cat hadoop-root-datanode-localhost.localdomain.log進行日志查看
1、java.net.BindException: 無法指定被請求的地址
另一種錯誤表現方式是：執行hadoop fs -put命令報錯could only be replicated to 0 nodes instead of minReplication (=1)
報錯大致如下：
20/12/01 00:45:48 WARN hdfs.DFSClient: DataStreamer Exception
org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /Hadoop/Input/wordcount.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded in this operation.
at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1571)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:725)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:982)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1698)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)
at org.apache.hadoop.ipc.Client.call(Client.java:1475)
at org.apache.hadoop.ipc.Client.call(Client.java:1412)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
at com.sun.proxy.$Proxy10.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:191)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
at com.sun.proxy.$Proxy11.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1455)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1251)
at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:448)
put: File /Hadoop/Input/wordcount.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1). There are 0 datanode(s) running and no node(s) are excluded in this operation.
解決辦法
在主節點執行JPS命令顯示
[root@master logs]# jps
7282 NameNode
7764 ResourceManager
8153 Jps
7551 SecondaryNameNode
從節點執行JPS命令顯示
[root@localhost current]# jps
4600 Jps
4426 NodeManager
顯示錯誤原因是因為dataNode沒有啟動成功。
下面我們查找dataNode啟動失敗的原因：
在從節點上找到Hadoop的安裝目錄下logs
目錄，打開cat hadoop-root-datanode-localhost.localdomain.log
查找錯誤，我的錯誤日志如下：
2020-12-02 18:18:46,740 INFO org.apache.hadoop.http.HttpServer2: HttpServer.start() threw a non Bind IOException
java.net.BindException: Port in use: localhost:0
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:919)
at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:856)
at org.apache.hadoop.hdfs.server.datanode.web.DatanodeHttpServer.<init>(DatanodeHttpServer.java:104)
at org.apache.hadoop.hdfs.server.datanode.DataNode.startInfoServer(DataNode.java:760)
at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1112)
at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:429)
at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2374)
at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2261)
at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2308)
at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2485)
at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2509)
Caused by: java.net.BindException: 無法指定被請求的地址
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216)
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:914)
... 10 more
2020-12-02 18:18:46,745 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Shutdown complete.
2020-12-02 18:18:46,745 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Exception in secureMain
java.net.BindException: Port in use: localhost:0
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:919)
at org.apache.hadoop.http.HttpServer2.start(HttpServer2.java:856)
at org.apache.hadoop.hdfs.server.datanode.web.DatanodeHttpServer.<init>(DatanodeHttpServer.java:104)
at org.apache.hadoop.hdfs.server.datanode.DataNode.startInfoServer(DataNode.java:760)
at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:1112)
at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:429)
at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:2374)
at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:2261)
at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:2308)
at org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:2485)
at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:2509)
Caused by: java.net.BindException: 無法指定被請求的地址
at sun.nio.ch.Net.bind0(Native Method)
at sun.nio.ch.Net.bind(Net.java:433)
at sun.nio.ch.Net.bind(Net.java:425)
at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
at org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216)
at org.apache.hadoop.http.HttpServer2.openListeners(HttpServer2.java:914)
... 10 more
2020-12-02 18:18:46,746 INFO org.apache.hadoop.util.ExitUtil: Exiting with status 1
2020-12-02 18:18:46,748 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at master/192.168.242.139
************************************************************/
可以清楚的看到是因為HOSTS文件配置不對引起的故障，把HOSTS文件
增加配置如下（我的HOSTS沒有如下配置是因為被刪除掉了……）：
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
重新在主節點上啟動“start-all.sh”，然后在從節點上執行JPS查看
[root@localhost logs]# jps
5398 Jps
5131 NodeManager
4958 DataNode
可以看到dataNode已經成功起動。
2、clusterID兩個ID不相等
在各從節點點查看：
cat hadoop-root-datanode-localhost.localdomain.log大致錯誤如下：
2020-12-09 18:10:40,810 WARN org.apache.hadoop.hdfs.server.common.Storage: Failed to add storage directory [DISK]file:/opt/hadoop-2.7.3/tmp/
java.io.IOException: Incompatible clusterIDs in /opt/hadoop-2.7.3/tmp: namenode clusterID = CID-f9f0e847-beee-4d43-9e59-24687906ef30; datanode clusterID = CID-58e9d874-8916-44b8-841c-723e950b1f41
at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:775)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadStorageDirectory(DataStorage.java:300)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.loadDataStorage(DataStorage.java:416)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.addStorageLocations(DataStorage.java:395)
at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:573)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1362)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1327)
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:317)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:223)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:802)
at java.lang.Thread.run(Thread.java:745)
2020-12-09 18:10:40,814 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for Block pool <registering> (Datanode Uuid unassigned) service to master/192.168.242.139:8020. Exiting.
java.io.IOException: All specified directories are failed to load.
at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:574)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:1362)
at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:1327)
at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:317)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:223)
at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:802)
at java.lang.Thread.run(Thread.java:745)
2020-12-09 18:10:40,815 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to master/192.168.242.139:8020
解決辦法
查看core-site.xml，找到存namenode元數據和datanode元數據的路徑。
<name>hadoop.tmp.dir</name>
<value>/opt/hadoop-2.7.3/tmp</value>
在這個路徑/opt/hadoop-2.7.3/tmp下去找datanode的VERSION文件，把從節點的clusterID 改成與主節點的相同，然后再主節點上執行start-dfs.sh試試，如果這時在從節點上執行jps命令后，發現DataNode已經啟動了，證明此方法可行。
3、報clusterID不一樣，但是VERSION文件的clusterID確與主節點一樣的解決方法
有時候會碰到日志文件同樣報clusterID不一樣，但是經過確認VERSION文件的clusterID確實同主節點一樣。這個時候查看下core-site.xml配置的datanode路徑下是不是多了一個current文件，這個時候current文件夾下兩樣也有一個一樣的VERSION文件，直接執行 rm -rf current/ 把該文件夾及文件夾下所有內容刪除，再主節點上執行start-dfs.sh試試。