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From "geoff hendrey (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-115) Map tasks are receiving FileNotFound Exceptions for spill files on a regular basis and are getting killed
Date Tue, 18 May 2010 01:00:42 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12868472#action_12868472
] 

geoff hendrey commented on MAPREDUCE-115:
-----------------------------------------

Most of my mappers are dying with this error. I am using Hadoop 20.2. Any suggestions for
a work around?

010-05-17 14:03:42,738 INFO org.apache.hadoop.mapred.Merger: Merging 22 sorted segments
2010-05-17 14:03:43,099 WARN org.apache.hadoop.mapred.TaskTracker: Error running child
java.io.FileNotFoundException: /hive4/mapred/local/taskTracker/jobcache/job_201005141621_0137/attempt_201005141621_0137_m_000000_0/output/spill15.out
	at org.apache.hadoop.fs.RawLocalFileSystem.open(RawLocalFileSystem.java:167)
	at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:356)
	at org.apache.hadoop.mapred.Merger$Segment.init(Merger.java:205)
	at org.apache.hadoop.mapred.Merger$Segment.access$100(Merger.java:165)
	at org.apache.hadoop.mapred.Merger$MergeQueue.merge(Merger.java:418)
	at org.apache.hadoop.mapred.Merger$MergeQueue.merge(Merger.java:381)
	at org.apache.hadoop.mapred.Merger.merge(Merger.java:77)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.mergeParts(MapTask.java:1522)
	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1154)
	at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:549)
	at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:623)
	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
	at org.apache.hadoop.mapred.Child.main(Child.java:170)



> Map tasks are receiving FileNotFound Exceptions for spill files on a regular basis and
are getting killed
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-115
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-115
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Jothi Padmanabhan
>
> The following is the log -- Map tasks are unable to locate the spill files when they
are doing the final merge (mergeParts). 
> java.io.FileNotFoundException: File /xxx/mapred-tt/mapred-local/taskTracker/jobcache/job_200808190959_0001/attempt_200808190959_0001_m_000000_0/output/spill23.out
does not exist.
> 	at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:420)
> 	at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:244)
> 	at org.apache.hadoop.fs.FileSystem.getContentSummary(FileSystem.java:682)
> 	at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.getFileLength(ChecksumFileSystem.java:218)
> 	at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.seek(ChecksumFileSystem.java:259)
> 	at org.apache.hadoop.fs.FSDataInputStream.seek(FSDataInputStream.java:37)
> 	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.mergeParts(MapTask.java:1102)
> 	at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:769)
> 	at org.apache.hadoop.mapred.MapTask.run(MapTask.java:255)
> 	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2208)

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