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https://issues.apache.org/jira/browse/HADOOP-8531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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madhukara phatak updated HADOOP-8531:
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Attachment: HADOOP-8531-1.patch
Hi Harsha,
Thanks for reviewing patch. I have updated the patch which fixes style issues
and error messages. Deserializer code already has null checks , so I think
there is no need of any change in them.
> 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.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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