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Posted to mapreduce-issues@hadoop.apache.org by "Junping Du (JIRA)" <ji...@apache.org> on 2017/01/06 01:46:58 UTC
[jira] [Updated] (MAPREDUCE-6633) AM should retry map attempts if
the reduce task encounters commpression related errors.
[ https://issues.apache.org/jira/browse/MAPREDUCE-6633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Junping Du updated MAPREDUCE-6633:
----------------------------------
Fix Version/s: 2.8.0
> AM should retry map attempts if the reduce task encounters commpression related errors.
> ---------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6633
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6633
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.7.2
> Reporter: Rushabh S Shah
> Assignee: Rushabh S Shah
> Fix For: 2.8.0, 2.7.3, 3.0.0-alpha1
>
> Attachments: MAPREDUCE-6633.patch
>
>
> When reduce task encounters compression related errors, AM doesn't retry the corresponding map task.
> In one of the case we encountered, here is the stack trace.
> {noformat}
> 2016-01-27 13:44:28,915 WARN [main] org.apache.hadoop.mapred.YarnChild: Exception running child : org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in shuffle in fetcher#29
> at org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:134)
> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:376)
> at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1694)
> at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
> Caused by: java.lang.ArrayIndexOutOfBoundsException
> at com.hadoop.compression.lzo.LzoDecompressor.setInput(LzoDecompressor.java:196)
> at org.apache.hadoop.io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:104)
> at org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:85)
> at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:192)
> at org.apache.hadoop.mapreduce.task.reduce.InMemoryMapOutput.shuffle(InMemoryMapOutput.java:97)
> at org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyMapOutput(Fetcher.java:537)
> at org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:336)
> at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:193)
> {noformat}
> In this case, the node on which the map task ran had a bad drive.
> If the AM had retried running that map task somewhere else, the job definitely would have succeeded.
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