Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18503#discussion_r125638233
--- 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 wit
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 --
so `RowBasedKeyValueBatch` is the format for state store? cc @zsxwing
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