boyuanzz commented on a change in pull request #12724:
URL: https://github.com/apache/beam/pull/12724#discussion_r480296260
##########
File path:
sdks/java/harness/src/main/java/org/apache/beam/fn/harness/FnApiDoFnRunner.java
##########
@@ -1642,43 +1642,45 @@ public Object restriction() {
.build());
}
- ByteString.Output primaryBytes = ByteString.newOutput();
- ByteString.Output residualBytes = ByteString.newOutput();
- try {
- fullInputCoder.encode(windowedSplitResult.getPrimarySplitRoot(),
primaryBytes);
- fullInputCoder.encode(windowedSplitResult.getResidualSplitRoot(),
residualBytes);
- } catch (IOException e) {
- throw new RuntimeException(e);
+ if (windowedSplitResult.getResidualSplitRoot() != null) {
Review comment:
`windowedSplitResult` can be null and it has been checked above
https://github.com/apache/beam/blob/master/sdks/java/harness/src/main/java/org/apache/beam/fn/harness/FnApiDoFnRunner.java#L1579-L1588.
I'm working on a refactor https://github.com/apache/beam/pull/12710, which
will provide much more test coverage. Sorry for the inconvenience.
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