关于HDFS操作出现的问题

asd5569502 2017-03-25 07:26:22

自己写的代码
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FSDataOutputStream;

public class fs1 {

public static void main(String[] args) throws Exception {

Configuration conf=new Configuration();

FileSystem hdfs=FileSystem.get(conf);

Path dfs1=new Path("hdfs://asd1:9000/user/hadoop");

FileStatus files[]=hdfs.listStatus(dfs1);

for(FileStatus file:files){

System.out.println(file.getPath());

}
System.out.println("===================copy===============================");

Path src =new Path("/home/hadoop/aa");

Path dst =new Path("hdfs://asd1:9000/user/hadoop/aa");

hdfs.copyFromLocalFile(src, dst);

Path dfs2=new Path("hdfs://asd1:9000/user/hadoop");

FileStatus files1[]=hdfs.listStatus(dfs2);

for(FileStatus file:files1){

System.out.println(file.getPath());

}
System.out.println("====================create============================");

byte[] buff="hello hadoop world!\n".getBytes();

Path dfs=new Path("hdfs://asd1:9000/user/hadoop/hellow.txt");

FSDataOutputStream outputStream=hdfs.create(dfs);

outputStream.write(buff,0,buff.length);

Path dfs3=new Path("hdfs://asd1:9000/user/hadoop/cc");

hdfs.mkdirs(dfs3);

Path dfs4=new Path("hdfs://asd1:9000/user/hadoop");

FileStatus files2[]=hdfs.listStatus(dfs4);

for(FileStatus file2:files2){

System.out.println(file2.getPath());

}
System.out.println("====================delete============================");

Path delef=new Path("hdfs://asd1:9000/user/hadoop/cc");

boolean isDeleted=hdfs.delete(delef,false);

System.out.println("Has been deleter?"+isDeleted);

Path delef1=new Path("hdfs://asd1:9000/user/hadoop/hellow.txt");

boolean isDeleted1=hdfs.delete(delef1,false);

System.out.println("Has been deleted?"+isDeleted1);

Path delef2=new Path("hdfs://asd1:9000/user/hadoop/aa");

boolean isDeleted2=hdfs.delete(delef2,false);

System.out.println("Has been deleted?"+isDeleted2);

System.out.println("====================end===============================");

}

}

执行后出来的结果：
[hadoop@asd1 jdk1.7.0_25]$ /usr/jdk1.7.0_25/bin/java fs1
====================cpoy===============================
hdfs://asd1:9000/user/hadoop/aa
===================create=============================
hdfs://asd1:9000/user/hadoop/aa
hdfs://asd1:9000/user/hadoop/cc
hdfs://asd1:9000/user/hadoop/hellow.txt
===================delete=============================
Has been deleter?true
Has been deleted?true
Has been deleted?true
======================end=============================
17/03/25 19:14:59 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /user/hadoop/hellow.txt File does not exist. Holder DFSClient_1027185360 does not have any open files.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1664)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1655)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1571)
at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:771)
at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1439)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1435)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1433)

at org.apache.hadoop.ipc.Client.call(Client.java:1150)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226)
at com.sun.proxy.$Proxy0.addBlock(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:82)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
at com.sun.proxy.$Proxy0.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3719)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3586)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2400(DFSClient.java:2792)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2987)

17/03/25 19:14:59 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null
17/03/25 19:14:59 WARN hdfs.DFSClient: Could not get block locations. Source file "/user/hadoop/hellow.txt" - Aborting...
17/03/25 19:14:59 ERROR hdfs.DFSClient: Exception closing file /user/hadoop/hellow.txt : org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /user/hadoop/hellow.txt File does not exist. Holder DFSClient_1027185360 does not have any open files.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1664)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1655)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1571)
at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:771)
at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1439)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1435)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1433)

org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /user/hadoop/hellow.txt File does not exist. Holder DFSClient_1027185360 does not have any open files.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1664)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1655)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1571)
at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:771)
at sun.reflect.GeneratedMethodAccessor8.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1439)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1435)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1278)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1433)

at org.apache.hadoop.ipc.Client.call(Client.java:1150)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226)
at com.sun.proxy.$Proxy0.addBlock(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:82)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
at com.sun.proxy.$Proxy0.addBlock(Unknown Source)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3719)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3586)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2400(DFSClient.java:2792)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2987)

能成功执行，但是后面一大堆警报是什么情况？
小白求教~~~

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