Spring cloud GCP, library abruptly stops receiving messages.

[ksachdev1]

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Describe the bug
I am using PubSubReactiveFactory route to stream messages. They sometimes work for few minutes to an hour, and after sometime, nothing gets picked up. If I restart the K8 pod running the code, it starts working again and the behavior repeats.

Sample Code

@Configuration
@Slf4j
public class PubSubConsumer {
    @Autowired
    private final PubSubReactiveFactory pubSubReactiveFactory;

    private final MyConfig myConfig;

    private final MySubscriberService mySubscriberService;

    @Autowired
    private final ObjectMapper objectMapper;

    private Disposable disposable;

    @Autowired
    public PubSubConsumer(PubSubReactiveFactory pubSubReactiveFactory, MyConfig myConfig, mySubscriberService mySubscriberService, ObjectMapper objectMapper) {
        log.info("PubSubConsumer constructor");
        this.pubSubReactiveFactory = pubSubReactiveFactory;
        this.myConfig = myConfig;
        this.mySubscriberService = mySubscriberService;
        this.objectMapper = objectMapper;
    }

    @EventListener(ApplicationReadyEvent.class)
    public void start() {
        log.info("Staring the My-Event-Listener");
        this.disposable = this.pubSubReactiveFactory.poll(myConfig.getMySubscription(),1000)
                .flatMap(this::myMessageHandler)
                .subscribeOn(Schedulers.parallel())
                .subscribe();


    }

    public Mono<Void> myMessageHandler(AcknowledgeablePubsubMessage message) {
        log.debug("myMessageHandler is called.");
        PubsubMessage m = message.getPubsubMessage();
        try {
            MyMessage myMessage = objectMapper
                    .readValue(m.getData().toByteArray(), MyMessage.class);
            mySubscriberService.myMessageReceiver(myMessage);
        } catch (Exception e) {
            log.error("Could not finish the action. {}",e.getMessage());
        } finally {
            return Mono.fromFuture(message.ack().toCompletableFuture());
        }
    }

    @EventListener(ContextClosedEvent.class)
    public void stop() {
        log.info("Stopping My-Event-Listener");
        if(this.disposable!=null && !this.disposable.isDisposed()) {
            this.disposable.dispose();
        }
    }

[mpeddada1]

Thanks for filing this issue @ksachdev1! Please consider submitting a support ticket to https://cloud.google.com/support/ to help with debugging this issue further. This will ensure your situation gets attention and may result in guidance on how to achieve your end goal.