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Posted to mapreduce-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2014/05/01 16:00:54 UTC
[jira] [Commented] (MAPREDUCE-5862) Line records longer than 2x
split size aren't handled correctly
[ https://issues.apache.org/jira/browse/MAPREDUCE-5862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13986600#comment-13986600 ]
Hadoop QA commented on MAPREDUCE-5862:
--------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12642800/0001-MAPREDUCE-5862.-Line-records-longer-than-2x-split-si.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author tags.
{color:green}+1 tests included{color}. The patch appears to include 3 new or modified test files.
{color:green}+1 javac{color}. The applied patch does not increase the total number of javac compiler warnings.
{color:green}+1 javadoc{color}. There were no new javadoc warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase the total number of release audit warnings.
{color:red}-1 core tests{color}. The patch failed these unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core:
org.apache.hadoop.mapred.TestLineRecordReader
org.apache.hadoop.mapreduce.lib.input.TestLineRecordReader
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/4572//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/4572//console
This message is automatically generated.
> Line records longer than 2x split size aren't handled correctly
> ---------------------------------------------------------------
>
> Key: MAPREDUCE-5862
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5862
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.3.0
> Reporter: bc Wong
> Assignee: bc Wong
> Priority: Critical
> Attachments: 0001-Handle-records-larger-than-2x-split-size.1.patch, 0001-Handle-records-larger-than-2x-split-size.patch, 0001-Handle-records-larger-than-2x-split-size.patch, 0001-MAPREDUCE-5862.-Line-records-longer-than-2x-split-si.patch, recordSpanningMultipleSplits.txt.bz2
>
>
> Suppose this split (100-200) is in the middle of a record (90-240):
> {noformat}
> 0 100 200 300
> |---- split ----|---- curr ----|---- split ----|
> <------- record ------->
> 90 240
> {noformat}
>
> Currently, the first split would read the entire record, up to offset 240, which is good. But the 2nd split has a bug in producing a phantom record of (200, 240).
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