java API 调用hadoop client 创建文件 报错

Question

java API 调用hadoop client 创建文件 报错 

1、hdfs运行在云服务器上面,防火墙已关闭

2、在云服务器上面通过hadoop fs -** 所有shell操作都正常

3、将在本地报错的代码打包成jar 在云服务器上运行 Java -jar ** 可以创建文件

4、在本地调用创建文件夹API 可以正常创建文件夹

namenode 的报错日志

"2017-10-18 15:01:42,363 INFO org.apache.hadoop.hdfs.server.namenode.FSEditLog: Number of transactions: 17 Total time for transactions(ms): 25 Number of transactions batched in Syncs: 0 Number of syncs: 11 SyncTimes(ms): 118 

2017-10-18 15:01:42,406 INFO org.apache.hadoop.hdfs.StateChange: BLOCK* allocateBlock: /hdfsapi/test/c.txt. BP-864496178-172.16.0.5-1508081571397 blk_1073741850_1026{blockUCState=UNDER_CONSTRUCTION, primaryNodeIndex=-1, replicas=[ReplicaUnderConstruction[[DISK]DS-ad4f0bab-4375-473c-bc99-d39cefaecc9e:NORMAL:172.16.0.5:50010|RBW]]}

2017-10-18 15:01:49,674 INFO org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor: Rescanning after 30000 milliseconds

2017-10-18 15:01:49,674 INFO org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor: Scanned 0 directive(s) and 0 block(s) in 1 millisecond(s).

2017-10-18 15:02:03,489 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 1 to reach 1 (unavailableStorages=[], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) For more information, please enable DEBUG log level on org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy

2017-10-18 15:02:03,489 WARN org.apache.hadoop.hdfs.protocol.BlockStoragePolicy: Failed to place enough replicas: expected size is 1 but only 0 storage types can be selected (replication=1, selected=[], unavailable=[DISK], removed=[DISK], policy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]})

2017-10-18 15:02:03,494 WARN org.apache.hadoop.hdfs.server.blockmanagement.BlockPlacementPolicy: Failed to place enough replicas, still in need of 1 to reach 1 (unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=true) All required storage types are unavailable:  unavailableStorages=[DISK], storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK], creationFallbacks=[], replicationFallbacks=[ARCHIVE]}

2017-10-18 15:02:03,495 WARN org.apache.hadoop.security.UserGroupInformation: PriviledgedActionException as:root (auth:SIMPLE) cause:java.io.IOException: File /hdfsapi/test/c.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 1 datanode(s) running and 1 node(s) are excluded in this operation.

2017-10-18 15:02:03,495 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 8020, call org.apache.hadoop.hdfs.protocol.ClientProtocol.addBlock from 116.24.64.128:33217 Call#3 Retry#0

java.io.IOException: File /hdfsapi/test/c.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 1 datanode(s) running and 1 node(s) are excluded in this operation.

        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1595)

        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3287)

        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:677)

        at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.addBlock(AuthorizationProviderProxyClientProtocol.java:213)

        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:485)

        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)

        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)

        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082)

        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:1693)

        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080)

2017-10-18 15:02:19,195 INFO org.apache.hadoop.hdfs.server.blockmanagement.BlockManager: StorageInfo TreeSet fill ratio DS-ad4f0bab-4375-473c-bc99-d39cefaecc9e : 1.0

2017-10-18 15:02:19,673 INFO org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor: Rescanning after 30000 milliseconds

2017-10-18 15:02:19,673 INFO org.apache.hadoop.hdfs.server.blockmanagement.CacheReplicationMonitor: Scanned 0 directive(s) and 0 block(s) in 0 millisecond(s).."

Hadoop client 的错误日志：

“

 Exception in thread "main" org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /hdfsapi/test/c.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 1 datanode(s) running and 1 node(s) are excluded in this operation.

        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1595)

        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3287)

        at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:677)

        at org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.addBlock(AuthorizationProviderProxyClientProtocol.java:213)

        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:485)

        at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)

        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)

        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082)

        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:1693)

        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080)

        at org.apache.hadoop.ipc.Client.call(Client.java:1471)

        at org.apache.hadoop.ipc.Client.call(Client.java:1408)

        at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:230)

        at com.sun.proxy.$Proxy9.addBlock(Unknown Source)

        at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:404)

        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:497)

        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:256)

        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:104)

        at com.sun.proxy.$Proxy10.addBlock(Unknown Source)

        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1704)

        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1500)

        at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:668)

”

Answer 1

Michael_PK 2017-10-18 15:05:38

你hdfs不正常

• 提问者 慕粉2056486049 #1

  [root@instance-ixvbcyx6 sbin]# jps
  30804 DataNode
  30983 SecondaryNameNode
  30716 NameNode
  31326 Jps
  感觉是不是 外网访问hdfs 时  和datanode通讯出了问题

• Michael_PK 回复 提问者 慕粉2056486049 #2

  java.io.IOException: File /hdfsapi/test/c.txt could only be replicated to 0 nodes instead of minReplication (=1).  There are 1 datanode(s) running and 1 node(s) are excluded in this operation.，百度下你就知道了，非常常见的一个问题