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  1. Hadoop Common
  2. HADOOP-15478

WASB: hflush() and hsync() regression

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.9.0, 3.0.2
    • 2.10.0, 3.1.1
    • fs/azure
    • None
    • WASB: Bug fix for recent regression in hflush() and hsync().

    Description

      HADOOP-14520 introduced a regression in hflush() and hsync().  Previously, for the default case where users upload data as block blobs, these were no-ops.  Unfortunately, HADOOP-14520 accidentally implemented hflush() and hsync() by default, so any data buffered in the stream is immediately uploaded to storage.  This new behavior is undesirable, because block blobs have a limit of 50,000 blocks.  Spark users are now seeing failures due to exceeding the block limit, since Spark frequently invokes hflush().

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            tmarquardt Thomas Marqardt Assign to me
            tmarquardt Thomas Marqardt
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