[HIVE-1893] ConditionalResolverSkewJoin.getTasks may throw NullPointerException

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.4.0, 0.4.1, 0.5.0, 0.6.0
• Component/s: Query Processor

Environment

RedHat 2.6.18-164.11.1.el5, JDK 1.6.0_06

• Assignee: Unassigned
• Reporter: Zhai Yantang
• Created: 06/Jan/11 02:25
• Updated: 14/Feb/11 21:02

Description

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.

Issue Links

• is related to: HADOOP-6009 S3N listStatus incorrectly returns null instead of empty array when called on empty root
• is related to: HDFS-538 DistributedFileSystem::listStatus incorrectly returns null for empty result sets
• is related to: HADOOP-3716 KFS listStatus() returns NULL on empty directories
• is related to: HDFS-303 Make contracts of LocalFileSystem and DistributedFileSystem consistent