Google Pub/Sub INVALID_RETRY_POLICY

The retry policy configuration is invalid.

Resolving INVALID_RETRY_POLICY in Google Pub/Sub

Understanding Google Pub/Sub

Google Cloud Pub/Sub is a messaging service designed to provide reliable, many-to-many, asynchronous messaging between applications. It allows you to send and receive messages between independent applications, decoupling senders and receivers. Pub/Sub is often used for event-driven architectures, real-time analytics, and data integration pipelines.

Identifying the Symptom

When working with Google Pub/Sub, you might encounter the error code INVALID_RETRY_POLICY. This error indicates that there is an issue with the configuration of the retry policy for your Pub/Sub client or subscription.

Common Observations

  • Messages are not being retried as expected.
  • Error logs indicating an invalid retry policy configuration.

Understanding the Issue

The INVALID_RETRY_POLICY error occurs when the retry policy set for a Pub/Sub client or subscription does not conform to the expected configuration. This can happen if the policy is missing required fields or contains invalid values.

Key Points to Consider

  • Ensure that all required fields in the retry policy are specified.
  • Verify that the values provided for the retry policy are within acceptable ranges.

Steps to Fix the INVALID_RETRY_POLICY Issue

To resolve the INVALID_RETRY_POLICY error, follow these steps:

Step 1: Review the Retry Policy Configuration

Check your retry policy configuration against the Google Pub/Sub Retry Settings documentation. Ensure that all required fields are present and correctly configured.

Step 2: Validate Field Values

Ensure that the values for fields such as minimumBackoff and maximumBackoff are within the allowed range. For example, minimumBackoff should be greater than or equal to 0 seconds, and maximumBackoff should be greater than or equal to minimumBackoff.

Step 3: Update the Configuration

If you find any discrepancies, update your retry policy configuration. You can do this through the Google Cloud Console or by using the gcloud command-line tool:

gcloud pubsub subscriptions update YOUR_SUBSCRIPTION_NAME \
--min-retry-delay=10s \
--max-retry-delay=600s

Step 4: Test the Configuration

After updating the configuration, test your Pub/Sub setup to ensure that messages are being retried as expected. Monitor the logs for any further errors.

Conclusion

By following these steps, you should be able to resolve the INVALID_RETRY_POLICY error in Google Pub/Sub. Proper configuration of retry policies is crucial for ensuring reliable message delivery in your applications. For more detailed information, refer to the Google Cloud Pub/Sub documentation.

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