adude3141 commented on a change in pull request #15955:
URL: https://github.com/apache/beam/pull/15955#discussion_r753827901
##########
File path:
sdks/java/io/kinesis/src/main/java/org/apache/beam/sdk/io/kinesis/KinesisIO.java
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@@ -1067,8 +1063,11 @@ private void checkForFailures(String message) throws
IOException {
@Teardown
public void teardown() throws Exception {
- if (producer != null && producer.getOutstandingRecordsCount() > 0) {
- producer.flushSync();
+ if (producer != null) {
+ if (producer.getOutstandingRecordsCount() > 0) {
+ producer.flushSync();
+ }
+ producer.destroy();
}
producer = null;
Review comment:
@aromanenko-dev After stumbling across this intended change, and as you
reviewed the [originating MR](https://github.com/apache/beam/pull/9640) where
the code is originating I am wondering, how this is working at all.
Iiuc this var 'producer' is static on KinesisWriterFn. Couldn't setting this
to 'null' in @Teardown of some DoFn instance result in random NPEs thrown in
some other DoFn currently running @ProcessElement or @FinishBundle? As it
seems, it does only work because unsetting producer simply does not cross some
memory fences?
So probably I have a misunderstanding of the inner workings here. What are
you thoughts about this?
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