david-streamlio commented on a change in pull request #10370:
URL: https://github.com/apache/pulsar/pull/10370#discussion_r620550371
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File path:
pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/JavaInstanceRunnable.java
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@@ -328,7 +342,8 @@ private void processResult(Record srcRecord,
srcRecord.fail();
} else {
if (result1.getResult() != null) {
- sendOutputMessage(srcRecord, result1.getResult());
+ // Grab the actual result
+ actualResult.set(result1.getResult());
Review comment:
Can you elaborate a bit? FWIW, I have tried various scenarios to keep
the call to `sendOutputMessage(srcRecord, result1.getResult());` insdie the
`whenComplete` completion stage, but in all scenarios, the exception thrown is
lost. I tried catching the exception and re-throwing a `CompletionException`
and also tried calling `result.completeExceptionally()` on the sink error as
well. In both cases the exception thrown by the Sink is lost. This was the only
way to have the exception thrown by the Sink actually caught and handled.
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