Uploaded image for project: 'Hive'
  1. Hive
  2. HIVE-720

Improve ByteStream by removing all synchronized method calls

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.4.0
    • None
    • None
    • Reviewed
    • Hide
      HIVE-720. Improve ByteStream by removing all synchronized method calls. (Yongqiang He via zshao)
      Show
      HIVE-720 . Improve ByteStream by removing all synchronized method calls. (Yongqiang He via zshao)

    Description

      org.apache.hadoop.hive.serde2.ByteStream has 2 inner classes: Input and Output, which inherits from ByteArrayInputStream and ByteArrayOutputStream.
      Both these classes have a lot of sychronized methods, which make them really slow.

      We should let ByteStream.Input and ByteStream.Output directly inherit InputStream and OutputStream so we don't need to call synchronized methods at all. This will help LazySimpleSerDe, ColumnarSerDe as well as LazyBinarySerDe.

      Attachments

        1. HIVE-720.1.patch
          12 kB
          He Yongqiang
        2. HIVE-720.2.patch
          45 kB
          He Yongqiang

        Activity

          People

            he yongqiang He Yongqiang
            zshao Zheng Shao
            Votes:
            0 Vote for this issue
            Watchers:
            0 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved: