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From cloud-fan <>
Subject [GitHub] spark pull request #18503: [SPARK-21271][SQL] Ensure Unsafe.sizeInBytes is a...
Date Thu, 06 Jul 2017 12:51:30 GMT
Github user cloud-fan commented on a diff in the pull request:
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/HDFSBackedStateStoreProvider.scala
    @@ -350,20 +350,24 @@ private[state] class HDFSBackedStateStoreProvider extends StateStoreProvider
               throw new IOException(
                 s"Error reading delta file $fileToRead of $this: key size cannot be $keySize")
             } else {
    -          val keyRowBuffer = new Array[Byte](keySize)
    +          // If key size in an existing file is not a multiple of 8, round it to multiple
of 8
    +          val keyAllocationSize = ((keySize + 7) / 8) * 8
    +          val keyRowBuffer = new Array[Byte](keyAllocationSize)
    --- End diff --
    I think all unsafe rows have the size of a multiple of 8, except `RowBasedKeyValueBatch`
in the previous code. So I'm wondering how the state store can have unsafe rows with wrong
size, does state store use `RowBasedKeyValueBatch`?

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