Google Pub/Sub The push endpoint did not respond within the timeout period.

The push endpoint is not responsive or is unable to handle incoming requests promptly.

Understanding Google Pub/Sub

Google Cloud Pub/Sub is a messaging service designed to provide reliable, many-to-many, asynchronous messaging between applications. It decouples senders and receivers, allowing for secure and scalable communication. Pub/Sub is commonly used for event-driven architectures, data streaming, and integrating microservices.

Identifying the Symptom

When using Google Pub/Sub with a push subscription, you may encounter the error: PUSH_ENDPOINT_TIMEOUT. This error indicates that the push endpoint did not respond within the expected timeout period, leading to message delivery failures.

Details About the PUSH_ENDPOINT_TIMEOUT Issue

The PUSH_ENDPOINT_TIMEOUT error occurs when the Pub/Sub service attempts to deliver a message to a configured push endpoint, but the endpoint does not acknowledge the message within the timeout period. This can lead to message redelivery attempts and potential delays in processing.

Common Causes

The push endpoint server is down or unreachable.
Network issues causing delays in communication.
The endpoint is overloaded and cannot process requests in a timely manner.

Steps to Fix the PUSH_ENDPOINT_TIMEOUT Issue

1. Verify Endpoint Availability

Ensure that the push endpoint is up and running. You can use tools like Pingdom or Uptrends to monitor the availability of your endpoint.

2. Check Network Connectivity

Ensure there are no network issues between Google Cloud and your push endpoint. Use tools like traceroute or ping to diagnose connectivity issues:

ping your-endpoint-url.com traceroute your-endpoint-url.com

3. Optimize Endpoint Performance

If the endpoint is overloaded, consider optimizing its performance. This could involve scaling your server resources, optimizing code, or implementing load balancing. Refer to Google Cloud Load Balancing for more information.

4. Increase Timeout Settings

Consider increasing the timeout settings for your push endpoint if it consistently requires more time to process requests. This can be configured in your Pub/Sub subscription settings.

Conclusion

Addressing the PUSH_ENDPOINT_TIMEOUT error involves ensuring your push endpoint is responsive and capable of handling requests within the expected timeframe. By following the steps outlined above, you can mitigate this issue and ensure reliable message delivery in your Google Pub/Sub setup. For more detailed guidance, refer to the Google Cloud Pub/Sub Push Subscription Documentation.

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The system is not in a state required for the operation's execution.

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The operation was cancelled, typically by the caller.

Google Pub/Sub The request contains an invalid argument.

The request parameters do not conform to the API specifications.

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