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https://issues.apache.org/jira/browse/HDFS-6641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Brahma Reddy Battula updated HDFS-6641:
---------------------------------------

    Summary: [ HDFS- File Concat ] Concat will fail when Src/target file is 
having one block which is not full   (was: [ HDFS- File Concat ] Concat will 
fail when block is not full)

> [ HDFS- File Concat ] Concat will fail when Src/target file is having one 
> block which is not full 
> --------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-6641
>                 URL: https://issues.apache.org/jira/browse/HDFS-6641
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 2.4.1
>            Reporter: Brahma Reddy Battula
>
> sually we can't ensure lastblock alwaysfull...please let me know purpose of 
> following check..
>     long blockSize = trgInode.getPreferredBlockSize();
>     // check the end block to be full
>     final BlockInfo last = trgInode.getLastBlock();
>     if(blockSize != last.getNumBytes()) {
>       throw new HadoopIllegalArgumentException("The last block in " + target
>           + " is not full; last block size = " + last.getNumBytes()
>           + " but file block size = " + blockSize);
>     }
> If it is issue, I'll file jira.
> Following is the trace..
> exception in thread "main" 
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.HadoopIllegalArgumentException):
>  The last block in /Test.txt is not full; last block size = 14 but file block 
> size = 134217728
> at 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.concatInternal(FSNamesystem.java:1887)
> at 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.concatInt(FSNamesystem.java:1833)
> at 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.concat(FSNamesystem.java:1795)
> at 
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.concat(NameNodeRpcServer.java:704)
> at 
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.concat(ClientNamenodeProtocolServerSideTranslatorPB.java:512)
> at 
> org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)



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