Hadoop程序报错，AlreadyBeingCreatedException failed to create file，请问这个错如何解决

[Youritumei_habataku]

我用一个scriptshell文件连续运行Mapreduce函数来写数据到hdfs文件中。
$ cat runHadoop
#!/bin/bash
while [ 1 = 1 ]
do
hadoop jar /home/hadoop/myprogram/EmpToHadoop.jar EmpToHadoop
sleep 150
done

运行了大概5小时后，报错：
org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException): failed to create file /test/HadoopData.txt for DFSClient_NONMAPREDUCE_-664155926_1 on client 127.0.0.1 because pendingCreates is non-null but no leases found.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.recoverLeaseInternal(FSNamesystem.java:2286)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInternal(FSNamesystem.java:2153)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFileInt(FSNamesystem.java:2386)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.appendFile(FSNamesystem.java:2347)
at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.append(NameNodeRpcServer.java:508)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.append(ClientNamenodeProtocolServerSideTranslatorPB.java:320)
at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:59572)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2042)

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.append(Unknown Source)
at sun.reflect.GeneratedMethodAccessor3.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:186)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
at com.sun.proxy.$Proxy9.append(Unknown Source)
at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.append(ClientNamenodeProtocolTranslatorPB.java:245)
at org.apache.hadoop.hdfs.DFSClient.callAppend(DFSClient.java:1480)
at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1520)
at org.apache.hadoop.hdfs.DFSClient.append(DFSClient.java:1508)
at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:310)
at org.apache.hadoop.hdfs.DistributedFileSystem$4.doCall(DistributedFileSystem.java:306)
at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at org.apache.hadoop.hdfs.DistributedFileSystem.append(DistributedFileSystem.java:306)
at org.apache.hadoop.fs.FileSystem.append(FileSystem.java:1160)
at EmpToHadoop.WriteDataToHadoop(EmpToHadoop.java:59)
at EmpToHadoop.ImpEMPtoHadoop(EmpToHadoop.java:222)
at EmpToHadoop.main(EmpToHadoop.java:27)
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.util.RunJar.main(RunJar.java:212)


请问AlreadyBeingCreatedException这个错怎么解决？

我的程序大概是：
public class EmpToHadoop{
private static Configuration conf = new Configuration();
private static Connection theConnection = null;
private static ResultSet rs = null;
private static String[] time_record_limit = new String[10];
private static String InputDataString = "hdfs:///test/HadoopData.txt";

public static void main(String[] args) {
try{
..........................
WriteDataToHadoop(strData);
}catch (Exception e) {
e.printStackTrace();
}
}

/**
* Write data into File in HDFS
*@return No return value
*/
public static void WriteDataToHadoop(String DataStr) throws Exception{
/*********Way2: Append**************/
try{
// get a HDFS filesystem instance
FileSystem fs = FileSystem.get(URI.create(InputDataString), conf);
FSDataOutputStream fsout = fs.append(new Path(InputDataString));
// wrap the outputstream with a writer
PrintWriter writer = new PrintWriter(fsout);

writer.append(DataStr);

writer.close();
fs.close();
}catch (Exception e) {
e.printStackTrace();
}
}

[Youritumei_habataku]

没人能解决吗

[海兰]

这个跟你程序没什么大关系，hadoop 的dfs里边有个lease manager 维护了文件path －> lease和 DFSClient name -> lease -> path (多个) 的映射关系，我估计是这个lease的问题，看下是不是被close（），而未来的及释放的lease造成的。