boyuanzz commented on a change in pull request #11418: [BEAM-8872] Support
split at fraction for OffsetRangeTracker
URL: https://github.com/apache/beam/pull/11418#discussion_r409826636
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File path:
runners/core-java/src/main/java/org/apache/beam/runners/core/OutputAndTimeBoundedSplittableProcessElementInvoker.java
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@@ -210,9 +210,10 @@ public FinishBundleContext
finishBundleContext(DoFn<InputT, OutputT> doFn) {
// the call says that not the whole restriction has been processed. So
we need to take
// a checkpoint now: checkpoint() guarantees that the primary
restriction describes exactly
// the work that was done in the current ProcessElement call, and
returns a residual
- // restriction that describes exactly the work that wasn't done in the
current call.
+ // restriction that describes exactly the work that wasn't done in the
current call. The
+ // residual is null when the entire restriction has been processed.
if (processContext.numClaimedBlocks > 0) {
- residual = checkNotNull(processContext.takeCheckpointNow());
+ residual = processContext.takeCheckpointNow();
Review comment:
I guess the original assumption is, checkpoint should happen after at least
one `tryClaim` called. Since we change the assumption, the `numClaimedBlocks `
can also be removed.
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