[Hadoop-common-dev] [jira] Created: (HADOOP-4927) Part files on the output filesystem are created irrespective of whether the corresponding task has anything to write there

Part files on the output filesystem are created irrespective of whether the corresponding task has anything to write there
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Key: HADOOP-4927
URL: https://issues.apache.org/jira/browse/HADOOP-4927
Project: Hadoop Core
Issue Type: Bug
Reporter: Devaraj Das
Fix For: 0.20.0


When OutputFormat.getRecordWriter is invoked, a part file is created on the output filesystem. But the created RecordWriter is not used until the OutputCollector.collect call is made by the task (user's code). This results in empty part files even if the OutputCollector.collect is never invoked by the corresponding tasks.