[jira] [Created] (MAPREDUCE-6639) Process hangs in LocatedFileStatusFetcher if FileSystem.get throws

["Ryan Blue (JIRA)" <ji...@apache.org>]

Ryan Blue created MAPREDUCE-6639:
------------------------------------

             Summary: Process hangs in LocatedFileStatusFetcher if FileSystem.get throws
                 Key: MAPREDUCE-6639
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6639
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mrv2
            Reporter: Ryan Blue


ListLocatedFileStatusFetcher uses a thread pool, but one of the Callable thread functions, [ProcessInitialInputPathCallable|https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/LocatedFileStatusFetcher.java#L306], doesn't catch exceptions (the others do). When an exception is thrown, the thread exists and doesn't signal the error to the calling thread, which continues waiting to be signaled. This can happen when a FS implementation cannot be found.

The solution is to use a try-catch around the implementation of {{ProcessInitialInputPathCallable#call}} that calls {{registerError}} when any exception is caught.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)