[HADOOP-8765] LocalDirAllocator.ifExists API is broken and unused

• Type: Bug
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Component/s: fs
• Labels: BB2015-05-TBR
• Assignee: Hemanth Yamijala
• Reporter: Hemanth Yamijala
• Created: 05/Sep/12 04:47
• Updated: 03/Mar/17 18:59

Description

LocalDirAllocator.ifExists calls AllocatorPerContext.ifExists, which accesses the localDirsPath variable that is uninitialised. Hence, any code that uses this API is likely to fail with a NullPointerException.

However, this API is currently not used anywhere else in trunk. The earlier usage was in IsolationRunner, that has since been removed via MAPREDUCE-2606.

Hence, we could remove this API for trunk, and if required, fix it for the 1.x branch.