Doubt in File concat implementaion

[Brahma Reddy Battula]

Hi All,

Usually 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 /file_one.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)



Thanks & Regards



Brahma Reddy Battula