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https://issues.apache.org/jira/browse/HADOOP-8531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13415025#comment-13415025
]
Hudson commented on HADOOP-8531:
--------------------------------
Integrated in Hadoop-Hdfs-trunk #1105 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1105/])
HADOOP-8531. SequenceFile Writer can throw out a better error if a
serializer or deserializer isn't available. Contributed by Madhukara Phatak.
(harsh) (Revision 1361933)
Result = FAILURE
harsh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1361933
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/io/SequenceFile.java
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/io/TestSequenceFile.java
> SequenceFile Writer can throw out a better error if a serializer or
> deserializer isn't available
> ------------------------------------------------------------------------------------------------
>
> Key: HADOOP-8531
> URL: https://issues.apache.org/jira/browse/HADOOP-8531
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Affects Versions: 2.0.0-alpha
> Reporter: Harsh J
> Assignee: madhukara phatak
> Priority: Trivial
> Labels: newbie
> Fix For: 2.1.0-alpha
>
> 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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