[HADOOP-9061] Java6+Windows does not work well with symlinks

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1-win
• Fix Version/s: 1-win
• Target Version/s: 1-win
• Hadoop Flags: Reviewed
• Assignee: Ivan Mitic
• Reporter: Ivan Mitic
• Created: 18/Nov/12 20:38
• Updated: 22/May/13 02:52
• Resolved: 06/Dec/12 15:22

Description

We’ve seen multiple problems with file operations on symbolic links on Java6 on Windows. Specifically:

• File#length returns zero on symbolic links
• File#renameTo renames the target, not the symlink

Problematic scenarios are mainly related to symlinks created for dist cache.

Java7 does not have above problems.

Issue Links

• is part of: HADOOP-8645 Stabilize branch-1-win
• is related to: MAPREDUCE-4987 TestMRJobs#testDistributedCache fails on Windows due to classpath problems and unexpected behavior of symlinks
• relates to: HADOOP-9590 Move to JDK7 improved APIs for file operations when available