TrackerDistributedCacheManager can fail because the number of subdirectories
reaches system limit
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Key: MAPREDUCE-1538
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1538
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: tasktracker
Affects Versions: 0.22.0
Reporter: Scott Chen
Assignee: Scott Chen
Fix For: 0.22.0
TrackerDistributedCacheManager deletes the cached files when the size goes up
to a configured number.
But there is no such limit for the number of subdirectories. Therefore the
number of subdirectories may grow large and exceed system limit.
This will make TT cannot create directory when getLocalCache and fails the
tasks.
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