[HADOOP-10942] Globbing optimizations and regression fix

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.1.0-beta, 3.0.0-alpha1
• Component/s: fs
• Labels: BB2015-05-TBR
• Target Version/s: 2.8.0
• Assignee: Daryn Sharp
• Reporter: Daryn Sharp
• Created: 06/Aug/14 22:03
• Updated: 13/May/16 20:31
• Resolved: 13/May/16 20:30

Description

When globbing was commonized to support both filesystem and filecontext, it regressed a fix that prevents an intermediate glob that matches a file from throwing a confusing permissions exception. The hdfs traverse check requires the exec bit which a file does not have.

Additional optimizations to reduce rpcs actually increases them if directories contain 1 item.

Issue Links

• is related to: HADOOP-10958 TestGlobPaths should do more tests of globbing by unprivileged users
• is related to: HADOOP-10957 The globber will sometimes erroneously return a permission denied exception when there is a non-terminal wildcard