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https://issues.apache.org/jira/browse/HIVE-1893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12978226#action_12978226
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Carl Steinbach commented on HIVE-1893:
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I grepped through the Hive source code and found this problem in many places.
Instead of modifying all of these files to add null checks I recommend instead
that we
create a HiveFileSystem wrapper class and put the checks there, and then modify
Hive code to access FileSystem objects through the wrapper. This will allow Hive
to rely on the FileSystem spec even when implementations of the FileSystem
spec don't adhere to it.
> ConditionalResolverSkewJoin.getTasks may throw NullPointerException
> -------------------------------------------------------------------
>
> Key: HIVE-1893
> URL: https://issues.apache.org/jira/browse/HIVE-1893
> Project: Hive
> Issue Type: Bug
> Components: Query Processor
> Affects Versions: 0.4.0, 0.4.1, 0.5.0, 0.6.0
> Environment: RedHat 2.6.18-164.11.1.el5, JDK 1.6.0_06
> Reporter: Zhai Yantang
> Fix For: 0.7.0
>
>
> In ConditionalResolverSkewJoin.getTasks(HiveConf, Object), FileStatus[]
> fstatus = inpFs.listStatus(dirPath) and then fstatus.length is accessed.
> However, DistributedFileSystem.listStatus(Path p) could return null, thus
> fstatus may be null, and then fstatus.length will throw NullPointerException.
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