HDFS全分布datanode异常

我按照手册用两台机器部署全分布，上传文件时出错：[ol]

[root@mysql1 conf]# hadoop dfs -put core-site.xml /test/

13/03/14 16:24:24 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /test/core-site.xml could only be replicated to 0 nodes, instead of 1

        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)

        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:729)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)

        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:1136)

        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

        at org.apache.hadoop.ipc.Client.call(Client.java:1107)

        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)

        at $Proxy1.addBlock(Unknown Source)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)

        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)

        at $Proxy1.addBlock(Unknown Source)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3686)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3546)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2749)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2989)

13/03/14 16:24:24 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null

13/03/14 16:24:24 WARN hdfs.DFSClient: Could not get block locations. Source file "/test/core-site.xml" - Aborting...

put: java.io.IOException: File /test/core-site.xml could only be replicated to 0 nodes, instead of 1

13/03/14 16:24:24 ERROR hdfs.DFSClient: Failed to close file /test/core-site.xml

org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /test/core-site.xml could only be replicated to 0 nodes, instead of 1

        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)

        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:729)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)

        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)

        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:1136)

        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

        at org.apache.hadoop.ipc.Client.call(Client.java:1107)

        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)

        at $Proxy1.addBlock(Unknown Source)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:597)

        at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)

        at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)

        at $Proxy1.addBlock(Unknown Source)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3686)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3546)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2749)

        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2989)[/ol]复制代码
查看文件系统状态：
[ol]

[root@mysql1 conf]# hadoop dfsadmin -report

Configured Capacity: 53664616448 (49.98 GB)

Present Capacity: 28672 (28 KB)

DFS Remaining: 0 (0 KB)

DFS Used: 28672 (28 KB)

DFS Used%: 100%

Under replicated blocks: 0

Blocks with corrupt replicas: 0

Missing blocks: 0

-------------------------------------------------

Datanodes available: 1 (1 total, 0 dead)

Name: 192.168.1.49:50010

Decommission Status : Normal

Configured Capacity: 53664616448 (49.98 GB)

DFS Used: 28672 (28 KB)

Non DFS Used: 53664587776 (49.98 GB)

DFS Remaining: 0(0 KB)

DFS Used%: 0%

DFS Remaining%: 0%

Last contact: Thu Mar 14 16:50:24 CST 2013[/ol]复制代码
这个状态很奇怪，datanode能识别，磁盘状态时正常的，但是文件系统容量不不符合逻辑，请问这是什么原因呢吗？

把文件的relication 设置成1 试试，默认是三块数据块，而你只有一台电脑。
try 一下吧。

看你dfsadmin -report的结果，最直观的感觉是这个datanode上没有剩余空间了  都被非hdfs的文件占用完了

以前遇到过，貌似是datanode不正常启动导致的，通过重新启动所有节点处理，可以试试。