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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8531) SequenceFile Writer can throw out a better error if a serializer isn't available
Date Sun, 15 Jul 2012 16:49:35 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414700#comment-13414700
] 

Hadoop QA commented on HADOOP-8531:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12536561/HADOOP-8531-2.patch
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 1 new or modified test files.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    -1 core tests.  The patch failed these unit tests in hadoop-common-project/hadoop-common:

                  org.apache.hadoop.ha.TestZKFailoverController
                  org.apache.hadoop.io.file.tfile.TestTFileByteArrays
                  org.apache.hadoop.io.file.tfile.TestTFileJClassComparatorByteArrays

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1197//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1197//console

This message is automatically generated.
                
> SequenceFile Writer can throw out a better error if a serializer isn't available
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-8531
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8531
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Harsh J
>            Assignee: madhukara phatak
>            Priority: Trivial
>              Labels: newbie
>         Attachments: HADOOP-8531-1.patch, HADOOP-8531-2.patch, HADOOP-8531-2.patch, HADOOP-8531.patch
>
>
> Currently, if the provided Key/Value class lacks a proper serializer in the loaded config
for the SequenceFile.Writer, we get an NPE as the null return goes unchecked.
> Hence we get:
> {code}
> java.lang.NullPointerException
> 	at org.apache.hadoop.io.SequenceFile$Writer.init(SequenceFile.java:1163)
> 	at org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:1079)
> 	at org.apache.hadoop.io.SequenceFile$RecordCompressWriter.<init>(SequenceFile.java:1331)
> 	at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:271)
> {code}
> We can provide a better message + exception in such cases. This is slightly related to
MAPREDUCE-2584.

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