nlu90 commented on a change in pull request #10618:
URL: https://github.com/apache/pulsar/pull/10618#discussion_r633929657
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File path:
pulsar-functions/instance/src/main/java/org/apache/pulsar/functions/instance/JavaInstanceRunnable.java
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@@ -272,11 +273,12 @@ public void run() {
removeLogTopicHandler();
- try {
- processResult(currentRecord, result);
- } catch (Exception e) {
- log.warn("Failed to process result of message {}",
currentRecord, e);
- currentRecord.fail();
+ // process the synchronous results
+ if (result != null) {
+ handleResult(currentRecord, result);
+ } else {
+ // process the asynchronous results
+ processAsyncResults();
Review comment:
The `null` result indicates the current record is placed into the queue
for async processing.
The `processAsyncResults()` method takes the first element from the queue
and checks/proceeds with the result.
1. It seems a newly added record triggers the check of whether the oldest
added record is done. This behavior is undesirable since records are
independent.
2. I'm wondering there'll always be one element left in the queue regardless
whether it's done or not.
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