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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1552) TaskTracker should report which fs during error
Date Wed, 03 Mar 2010 00:41:27 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12840404#action_12840404

Allen Wittenauer commented on MAPREDUCE-1552:

Here is the stack trace we get in the attempt log:

2010-03-02 13:04:11,182 INFO org.apache.hadoop.mapred.Merger: Merging 115 sorted segments
2010-03-02 13:04:11,852 INFO org.apache.hadoop.mapred.Merger: Merging 16 intermediate segments
out of a total of 115
2010-03-02 13:05:13,784 FATAL org.apache.hadoop.mapred.TaskTracker: FSError from child
org.apache.hadoop.fs.FSError: java.io.IOException: Disc quota exceeded
	at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.write(RawLocalFileSystem.java:192)
	at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
	at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109)
	at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:49)
	at java.io.DataOutputStream.write(DataOutputStream.java:90)
Caused by: java.io.IOException: Disc quota exceeded
	at java.io.FileOutputStream.writeBytes(Native Method)
	at java.io.FileOutputStream.write(FileOutputStream.java:260)
	at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.write(RawLocalFileSystem.java:190)
	... 17 more

The location might be in the task tracker log, but it seems like it would be more obvious
to be here.

> TaskTracker should report which fs during error
> -----------------------------------------------
>                 Key: MAPREDUCE-1552
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1552
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>    Affects Versions: 0.20.2
>            Reporter: Allen Wittenauer
> We run with ZFS with fs quotas for the mapred spill space to prevent it over-running
the HDFS space.  During merge, we some times end up running out of space.  It would be useful
if the stack trace (see below) included which file system the errors actually came from.

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