GH-3695: Fix MessagingMessageListenerAdapter to not ack when sync
#3696
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…ack when sync Fixes: spring-projects#3695 Even if th `@KafkaHandler` method is `void` the `DelegatingInvocableHandler` returns an empty `InvocationResult`. That triggers a `MessagingMessageListenerAdapter.handleResult()` logic. On the `completableFutureResult.whenComplete()` we call `acknowledge()` which is not expected for `void` POJO methods. * Fix `MessagingMessageListenerAdapter` to check for `isAsyncReplies()` before calling `acknowledge()` This is a regression after spring-projects#3528
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Fixes: #3695
Even if th
@KafkaHandlermethod isvoidtheDelegatingInvocableHandlerreturns an emptyInvocationResult. That triggers aMessagingMessageListenerAdapter.handleResult()logic. On thecompletableFutureResult.whenComplete()we callacknowledge()which is not expected forvoidPOJO methods.MessagingMessageListenerAdapterto check forisAsyncReplies()before callingacknowledge()This is a regression after #3528