[
https://issues.apache.org/jira/browse/MAPREDUCE-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12728238#action_12728238
]
Hudson commented on MAPREDUCE-646:
----------------------------------
Integrated in Hadoop-Mapreduce-trunk #15 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-Mapreduce-trunk/15/])
> distcp should place the file distcp_src_files in distributed cache
> ------------------------------------------------------------------
>
> Key: MAPREDUCE-646
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-646
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: distcp
> Reporter: Ravi Gummadi
> Assignee: Ravi Gummadi
> Fix For: 0.21.0
>
> Attachments: d_replica_srcfilelist.patch,
> d_replica_srcfilelist_v1.patch, d_replica_srcfilelist_v2.patch
>
>
> When large number of files are being copied by distcp, accessing
> distcp_src_files seems to be an issue, as all map tasks would be accessing
> this file. The error message seen is:
> 09/06/16 10:13:16 INFO mapred.JobClient: Task Id :
> attempt_200906040559_0110_m_003348_0, Status : FAILED
> java.io.IOException: Could not obtain block: blk_-4229860619941366534_1500174
> file=/mapredsystem/hadoop/mapredsystem/distcp_7fiyvq/_distcp_src_files
> at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.chooseDataNode(DFSClient.java:1757)
> at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:1585)
> at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:1712)
> at java.io.DataInputStream.readFully(DataInputStream.java:178)
> at java.io.DataInputStream.readFully(DataInputStream.java:152)
> at
> org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1450)
> at
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1428)
> at
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1417)
> at
> org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1412)
> at
> org.apache.hadoop.mapred.SequenceFileRecordReader.<init>(SequenceFileRecordReader.java:43)
> at
> org.apache.hadoop.tools.DistCp$CopyInputFormat.getRecordReader(DistCp.java:299)
> at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:336)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
> at org.apache.hadoop.mapred.Child.main(Child.java:170)
> This could be because of HADOOP-6038 and/or HADOOP-4681.
> If distcp places this special file distcp_src_files in distributed cache,
> that could solve the problem.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
