boyuanzz commented on a change in pull request #11454: [BEAM-8871] Support
trySplit for ByteKeyRangeTracker
URL: https://github.com/apache/beam/pull/11454#discussion_r410493070
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/splittabledofn/ByteKeyRangeTracker.java
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@@ -64,31 +64,38 @@ public ByteKeyRange currentRestriction() {
@Override
public SplitResult<ByteKeyRange> trySplit(double fractionOfRemainder) {
- // TODO(BEAM-8871): Add support for splitting off a fixed amount of work
for this restriction
- // instead of only supporting checkpointing.
-
- // If we haven't done any work, we should return the original range we
were processing
- // as the checkpoint.
- if (lastAttemptedKey == null) {
- ByteKeyRange rval = range;
- // We update our current range to an interval that contains no elements.
- range = NO_KEYS;
- return SplitResult.of(range, rval);
+ // No split on an empty range.
+ if (NO_KEYS.equals(range)) {
+ return null;
Review comment:
I can update java `RestrictionTracker` within this PR if that's preferable.
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