Steve Loughran created HADOOP-18546:
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             Summary: disable purging list of in progress reads in abfs stream 
closed
                 Key: HADOOP-18546
                 URL: https://issues.apache.org/jira/browse/HADOOP-18546
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/azure
    Affects Versions: 3.3.4
            Reporter: Steve Loughran
            Assignee: Steve Loughran


turn off the prune of in progress reads in 
ReadBufferManager::purgeBuffersForStream

this will ensure active prefetches for a closed stream complete. they wiill 
then get to the completed list and hang around until evicted by timeout, but at 
least prefetching will be safe.



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