fix synchronization around staleCount in DataCollector
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Key: PIG-234
URL: https://issues.apache.org/jira/browse/PIG-234
Project: Pig
Issue Type: Bug
Components: impl
Reporter: Chad Whipkey
Priority: Minor
DataCollector uses synchronized statements on staleCount, but the staleCount
reference changes! I'm proposing it switch to use the concurrent package Lock
and condition to manage staleness.
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