alex-balikov commented on code in PR #36073:
URL: https://github.com/apache/spark/pull/36073#discussion_r843405928
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sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/SymmetricHashJoinStateManager.scala:
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@@ -272,12 +289,36 @@ class SymmetricHashJoinStateManager(
if (index != numValues - 1) {
val valuePairAtMaxIndex = keyWithIndexToValue.get(currentKey,
numValues - 1)
if (valuePairAtMaxIndex != null) {
+ // likely case where last element is non-null and we can simply
swap with index
keyWithIndexToValue.put(currentKey, index,
valuePairAtMaxIndex.value,
valuePairAtMaxIndex.matched)
} else {
- val projectedKey = getInternalRowOfKeyWithIndex(currentKey)
- logWarning(s"`keyWithIndexToValue` returns a null value for index
${numValues - 1} " +
- s"at current key $projectedKey.")
+ // Find the rightmost non null index and swap values with that
index,
+ // if index returned is not the same as the passed one
+ val nonNullIndex = getRightMostNonNullIndex(index +
1).getOrElse(index)
+ if (nonNullIndex != index) {
+ val valuePair = keyWithIndexToValue.get(currentKey, nonNullIndex)
+ keyWithIndexToValue.put(currentKey, index, valuePair.value,
+ valuePair.matched)
+ }
+
+ // If nulls were found at the end, get the projected key and log a
warning
+ // for the range of null indices.
+ if (nonNullIndex != numValues - 1) {
+ val projectedKey = getInternalRowOfKeyWithIndex(currentKey)
+ logWarning(s"`keyWithIndexToValue` returns a null value for
indices " +
+ s"with range from startIndex=${nonNullIndex + 1} " +
+ s"and endIndex=${numValues - 1} " +
+ s"at currentKey=$projectedKey.")
Review Comment:
How about we log a hash of the key. Anyway the binary form of the key is
unreadable and would need to be programmatically parsed to match the key. We
can as well match the key hash.
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