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From 권병창 <magnu...@navercorp.com>
Subject Re: Output File could only be replicated to 0 nodes
Date Mon, 01 Aug 2016 07:10:01 GMT
 
dfs.namenode.replication.considerLoadtrueDecide if chooseTarget considers the target's load
or not 
there are wide variation in Xceivers of below datanode.  
try  dfs.namenode.replication.considerLoad=false 
 
 
-----Original Message-----
From: "Madhav Sharan"&lt;msharan@usc.edu&gt; 
To: "Gagan Brahmi"&lt;gaganbrahmi@gmail.com&gt;; 
Cc: "Gabriel Balan"&lt;gabriel.balan@oracle.com&gt;; "user"&lt;user@hadoop.apache.org&gt;;
&lt;ananthk_ganesh@yahoo.com&gt;; 
Sent: 2016-08-01 (월) 15:57:35
Subject: Re: Output File could only be replicated to 0 nodes
 
Thanks everyone for help. I believe the error was coming because of increase in Non DFS memory
usage. 
Name: 172.31.11.49:50010 Decommission Status : NormalConfigured Capacity: 74033672192 (68.95
GB)DFS Used: 6814511104 (6.35 GB)Non DFS Used: 4128133120 (3.84 GB)DFS Remaining: 63091027968
(58.76 GB)DFS Used%: 9.20%DFS Remaining%: 85.22%Configured Cache Capacity: 0 (0 B)Cache Used:
0 (0 B)Cache Remaining: 0 (0 B)Cache Used%: 100.00%Cache Remaining%: 0.00%Xceivers: 1   Name:
172.31.11.49:50010 Decommission Status : NormalConfigured Capacity: 74033672192 (68.95 GB)DFS
Used: 7336382464 (6.83 GB)Non DFS Used: 60541867008 (56.38 GB)DFS Remaining: 6155422720 (5.73
GB)DFS Used%: 9.91%DFS Remaining%: 8.31%Configured Cache Capacity: 0 (0 B)Cache Used: 0 (0
B)Cache Remaining: 0 (0 B)Cache Used%: 100.00%Cache Remaining%: 0.00%Xceivers: 847 --Madhav
Sharan  

On Mon, Jul 25, 2016 at 10:00 AM, Gagan Brahmi &lt;gaganbrahmi@gmail.com&gt; wrote:
There can be several reasons you see this error. The most common ones are: Disk Space on Datanodes
- Like mentioned earlier in the thread.Inconsistent DataNodes - You can try to restart HDFS
which should clean it up.Bad or Unresponsive DatanodeNegative 'Block Size' in hdfs-site.xml.Network
communication issues.  Regards,Gagan Brahmi
On Mon, Jul 25, 2016 at 9:14 AM, Gabriel Balan &lt;gabriel.balan@oracle.com&gt; wrote:

  
    
  
  
    

    

    Hi

    org.apache.hadoop.ipc.RemoteException(java.io.IOException):
        File
/user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt
        could only be replicated to 0 nodes instead of minReplication
        (=1).  There are 9 datanode(s) running and no node(s)
        are excluded in this operation.
    
    Can it be there is no more space left (for HDFS) on the host
      running data nodes?

    

    Try running "hdfs dfsadmin -report"

    

    hth

    Gabriel Balan

    

    

    On 7/24/2016 7:53 PM, Madhav Sharan
      wrote:

    
    
      
      
        Hi hadoop users,

        
        

          
        We are running a mapreduce jobs with 10 nodes. Each
             map job process a video and generate a .txt file as output.
            We are getting DataStreamer Exception that File could
          only be replicated to 0 nodes instead of minReplication (=1).
          This is the output file we expect after successful run. 
         
        
        Any help is appreciated. We checked hdfs has space
          available and all nodes are responding.
         
        
        Full trace - 
         
        
        2016-07-24 21:55:08,343 WARN [Thread-214]
          org.apache.hadoop.hdfs.DFSClient: DataStreamer Exception
        org.apache.hadoop.ipc.RemoteException(java.io.IOException):
          File
/user/pts/output/OTSOutput/_temporary/1/_temporary/attempt_1463_0008_m_000018_2/video.mp4.of.txt
          could only be replicated to 0 nodes instead of minReplication
          (=1).  There are 9 datanode(s) running and no node(s) are
          excluded in this operation.
                at
org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1547)
                at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3107)
                at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3031)
                at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:724)
                at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
                at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
                at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
                at
          org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
                at
          org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
                at
          org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
                at
          java.security.AccessController.doPrivileged(Native Method)
                at
          javax.security.auth.Subject.doAs(Subject.java:415)
                at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
                at
          org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)
        

        
                at
          org.apache.hadoop.ipc.Client.call(Client.java:1475)
                at
          org.apache.hadoop.ipc.Client.call(Client.java:1412)
                at
org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
                at com.sun.proxy.$Proxy12.addBlock(Unknown
          Source)
                at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
                at
          sun.reflect.GeneratedMethodAccessor4.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:191)
                at
org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
                at com.sun.proxy.$Proxy13.addBlock(Unknown
          Source)
                at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1459)
                at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1255)
                at
org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)
        

        
        --

        
          
            
              
                
                  
                    
                      Madhav Sharan

                      
                      
                         
                        
                      
                    
                  
                
              
            
          
        
      
    
    

    -- 
The statements and opinions expressed here are my own and do not necessarily represent those
of Oracle Corporation.
  

 
 


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