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From "liaowenrui (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3333) java.io.IOException: File /user/root/lwr/test31.txt could only be replicated to 0 nodes instead of minReplication (=1). There are 3 datanode(s) running and 3 node(s) are excluded in this operation.
Date Wed, 02 May 2012 02:04:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13266294#comment-13266294
] 

liaowenrui commented on HDFS-3333:
----------------------------------

Hi,this issue is diffrent yours,the first,Data is wrriten Nomal, After a while,it throw this
exception.
                
> java.io.IOException: File /user/root/lwr/test31.txt could only be replicated to 0 nodes
instead of minReplication (=1).  There are 3 datanode(s) running and 3 node(s) are excluded
in this operation.
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-3333
>                 URL: https://issues.apache.org/jira/browse/HDFS-3333
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.23.1, 2.0.0
>         Environment: namenodeļ¼š1 (IP:10.18.40.154)
> datanodeļ¼š3 (IP:10.18.40.154,10.18.40.102,10.18.52.55)
> HOST-10-18-40-154:/home/APril20/install/hadoop/namenode/bin # ./hadoop dfsadmin -report
> DEPRECATED: Use of this script to execute hdfs command is deprecated.
> Instead use the hdfs command for it.
> Configured Capacity: 129238446080 (120.36 GB)
> Present Capacity: 51742765056 (48.19 GB)
> DFS Remaining: 49548591104 (46.15 GB)
> DFS Used: 2194173952 (2.04 GB)
> DFS Used%: 4.24%
> Under replicated blocks: 14831
> Blocks with corrupt replicas: 1
> Missing blocks: 100
> -------------------------------------------------
> Datanodes available: 3 (3 total, 0 dead)
> Live datanodes:
> Name: 10.18.40.102:50010 (10.18.40.102)
> Hostname: linux.site
> Decommission Status : Normal
> Configured Capacity: 22765834240 (21.2 GB)
> DFS Used: 634748928 (605.34 MB)
> Non DFS Used: 1762299904 (1.64 GB)
> DFS Remaining: 20368785408 (18.97 GB)
> DFS Used%: 2.79%
> DFS Remaining%: 89.47%
> Last contact: Fri Apr 27 10:35:57 IST 2012
> Name: 10.18.40.154:50010 (HOST-10-18-40-154)
> Hostname: HOST-10-18-40-154
> Decommission Status : Normal
> Configured Capacity: 23259897856 (21.66 GB)
> DFS Used: 812396544 (774.76 MB)
> Non DFS Used: 8297279488 (7.73 GB)
> DFS Remaining: 14150221824 (13.18 GB)
> DFS Used%: 3.49%
> DFS Remaining%: 60.84%
> Last contact: Fri Apr 27 10:35:58 IST 2012
> Name: 10.18.52.55:50010 (10.18.52.55)
> Hostname: HOST-10-18-52-55
> Decommission Status : Normal
> Configured Capacity: 83212713984 (77.5 GB)
> DFS Used: 747028480 (712.42 MB)
> Non DFS Used: 67436101632 (62.8 GB)
> DFS Remaining: 15029583872 (14 GB)
> DFS Used%: 0.9%
> DFS Remaining%: 18.06%
> Last contact: Fri Apr 27 10:35:58 IST 2012
>            Reporter: liaowenrui
>   Original Estimate: 0.2h
>  Remaining Estimate: 0.2h
>
> log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.lib.MutableMetricsFactory).
> log4j:WARN Please initialize the log4j system properly.
> java.io.IOException: File /user/root/lwr/test31.txt could only be replicated to 0 nodes
instead of minReplication (=1).  There are 3 datanode(s) running and 3 node(s) are excluded
in this operation.
> 	at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget(BlockManager.java:1259)
> 	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1916)
> 	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:472)
> 	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:292)
> 	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:42602)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:428)
> 	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:905)
> 	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1688)
> 	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1684)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:396)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1205)
> 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1682)
> i:4284
> 	at org.apache.hadoop.ipc.Client.call(Client.java:1159)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:185)
> 	at $Proxy9.addBlock(Unknown Source)
> 	at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
> 	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:165)
> 	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:84)
> 	at $Proxy9.addBlock(Unknown Source)
> 	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:295)
> 	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1097)
> 	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:973)
> 	at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:455)
> testcase:
> import java.io.IOException;
> import java.net.URI;
> import org.apache.hadoop.conf.Configuration;
> import org.apache.hadoop.fs.FSDataOutputStream;
> import org.apache.hadoop.fs.Path;
> import org.apache.hadoop.hdfs.DFSConfigKeys;
> import org.apache.hadoop.hdfs.DistributedFileSystem;
> public class Write1 {
> 	/**
> 	 * @param args
> 	 * @throws Exception 
> 	 */
> 	public static void main(String[] args) throws Exception {
> 		//System.out.println("main");
> 		String hdfsFile="/user/root/lwr/test31.txt";
>     	byte writeBuff[] = new byte [1024 * 1024];
>     	int i=0;
>     	DistributedFileSystem dfs = new DistributedFileSystem();
>     	Configuration conf=new Configuration();
>     	//conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 512);
>     	//conf.setLong(DFSConfigKeys.DFS_REPLICATION_KEY, 2);
>         // conf.setInt("dfs.replication", 3);
>         conf.setLong("dfs.blocksize", 512);
>     	dfs.initialize(URI.create("hdfs://10.18.40.154:9000"), conf);
>     	//dfs.delete(new Path(hdfsFile));
> 	    //appendFile(dfs,hdfsFile,1024 * 1024,true);
>     	try
>     	{
>     	FSDataOutputStream out1=dfs.create(new Path(hdfsFile));
>     	
>    	    for(i=0;i<100000;i++)
>    	    {
>     	 out1.write(writeBuff, 0, 512);
>     	}
>         out1.hsync();
>         out1.close();
>         /*
> 	    FSDataOutputStream out=dfs.append(new Path(hdfsFile),4096);
> 		out.write(writeBuff, 0, 512 * 1024);
> 		out.hsync();
> 		out.close();
> 		*/
>     	}catch (IOException e)
>     	{    	   
>     	   System.out.println("i:" + i);
>     	   e.printStackTrace();
>     	}
>     	finally
>     	{   
>     		
>     		System.out.println("i:" + i);
>     	    System.out.println("end!");
>     	 
>     	}
>     }
> 	
> }

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