Google Cloud Pub/Sub is a messaging service that allows you to send and receive messages between independent applications. It is designed to provide reliable, many-to-many, asynchronous messaging between applications. Pub/Sub decouples senders and receivers, allowing for secure and scalable communication.
When using Google Pub/Sub, you might encounter the error code EXCEEDED_MAX_BYTES. This error indicates that the subscription has accumulated too many unacknowledged bytes, which can hinder the flow of messages.
As a developer, you may notice that your subscribers are not receiving messages as expected, or there is a significant delay in message processing. This can be a sign that the subscription is overwhelmed with unacknowledged messages.
The EXCEEDED_MAX_BYTES error occurs when the total size of unacknowledged messages exceeds the maximum allowed limit for a subscription. This can happen if your subscribers are not processing messages quickly enough, leading to a backlog.
The primary cause of this issue is insufficient subscriber throughput. If the subscribers are not acknowledging messages in a timely manner, the unacknowledged message size grows, eventually hitting the limit.
To resolve this issue, you need to enhance your subscriber's ability to process messages efficiently. Here are some actionable steps:
Consider scaling your subscriber instances to handle more messages concurrently. You can use Google Cloud's autoscaling features to dynamically adjust the number of instances based on the load.
Modify the acknowledgment deadline to give subscribers more time to process messages. This can be done by updating the subscription settings:
gcloud pubsub subscriptions update YOUR_SUBSCRIPTION_NAME --ack-deadline=60
Replace YOUR_SUBSCRIPTION_NAME with your actual subscription name. The --ack-deadline value is in seconds.
Review and optimize the message processing logic in your subscriber application. Ensure that the processing is efficient and does not introduce unnecessary delays.
For more detailed guidance, you can explore the following resources:
By following these steps, you can effectively manage and resolve the EXCEEDED_MAX_BYTES issue, ensuring smooth and efficient message processing in your Google Pub/Sub environment.
Let Dr. Droid create custom investigation plans for your infrastructure.
Book Demo
