GCP Pub/Sub Message Acknowledgment Delay with Spring Cloud GCP
Does anyone know how to I'm working on a project and hit a roadblock... I'm stuck on something that should probably be simple. I am experiencing significant delays in message acknowledgment when using Google Cloud Pub/Sub with Spring Cloud GCP. My Spring Boot application is set up to subscribe to a topic and process messages asynchronously. However, I've noticed that even after processing a message, the acknowledgment seems to take up to 20 seconds before it is reflected in the Pub/Sub dashboard. This delay is causing my application to fall behind on processing incoming messages. I've configured the listener as follows: ```java import org.springframework.cloud.gcp.pubsub.core.PubSubTemplate; import org.springframework.cloud.gcp.pubsub.listener.PubSubListener; import org.springframework.stereotype.Component; @Component public class MyPubSubListener implements PubSubListener { private final PubSubTemplate pubSubTemplate; public MyPubSubListener(PubSubTemplate pubSubTemplate) { this.pubSubTemplate = pubSubTemplate; } @Override public void onMessage(PubSubMessage message) { // Processing message System.out.println("Received message: " + message.getData()); try { // Simulate processing time Thread.sleep(5000); } catch (InterruptedException e) { Thread.currentThread().interrupt(); } } } ``` In my application properties, I have the following configuration: ```properties spring.cloud.gcp.pubsub.emulator-host=localhost:8085 spring.cloud.gcp.pubsub.project-id=my-project-id spring.cloud.gcp.pubsub.subscription=my-subscription-id spring.cloud.gcp.pubsub.listener.acknowledge-mode=MANUAL ``` I've tried switching the acknowledge mode to AUTO, but that didn't resolve the issue. Additionally, I've verified network latency and it seems normal at around 20 ms. My current Spring Cloud GCP version is 1.2.7. Could this delay be related to the way messages are being processed or any specific configurations in the Pub/Sub settings? Any suggestions on how to reduce the acknowledgment time would be greatly appreciated! I'm working on a service that needs to handle this. Am I missing something obvious? Thanks for taking the time to read this! Has anyone dealt with something similar?