[HDFS-6641] [ HDFS- File Concat ] Concat will fail when target file is having one block which is not full

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 2.4.1
• Component/s: namenode
• Assignee: Unassigned
• Reporter: Brahma Reddy Battula
• Created: 08/Jul/14 13:28
• Updated: 15/Jul/14 06:07
• Resolved: 08/Jul/14 20:18

Description

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)

Issue Links

• relates to: HDFS-222 Support for concatenating of files into a single file