Google Pub/Sub RESOURCE_EXHAUSTED error encountered when using Google Pub/Sub.

The project has exceeded its quota for the requested resource.

Understanding Google Pub/Sub

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.

Identifying the Symptom

When using Google Pub/Sub, you might encounter the RESOURCE_EXHAUSTED error. This error typically indicates that your project has exceeded its quota for a specific resource, such as message throughput or storage.

What You Might Observe

While interacting with Pub/Sub, you may notice that messages are not being published or consumed as expected. The error message will explicitly state RESOURCE_EXHAUSTED, signaling a quota issue.

Details About the RESOURCE_EXHAUSTED Issue

The RESOURCE_EXHAUSTED error in Google Pub/Sub occurs when your project surpasses the allocated quota for a particular resource. Quotas are set to protect both the user and the Google Cloud infrastructure from unexpected spikes in usage. You can view your current quotas and usage in the Google Cloud Console.

Common Causes

High message throughput exceeding the allowed limit.
Excessive storage usage for retained messages.
Too many API requests in a short period.

Steps to Resolve the RESOURCE_EXHAUSTED Error

To resolve this issue, you need to manage your quotas effectively and request increases if necessary. Follow these steps:

Step 1: Check Current Quotas

Navigate to the Google Cloud Console Quotas page to view your current usage and limits. Identify which resource is causing the RESOURCE_EXHAUSTED error.

Step 2: Optimize Resource Usage

Review your application's message publishing and consumption patterns.
Consider implementing message batching to reduce the number of API calls.
Ensure that messages are acknowledged promptly to avoid unnecessary storage usage.

Step 3: Request a Quota Increase

If optimization does not resolve the issue, you can request a quota increase:

Go to the Quotas page in the Google Cloud Console.
Select the quota you wish to increase.
Click on the "Edit Quotas" button.
Fill out the request form with the necessary details and submit it.

Conclusion

By understanding and managing your Google Pub/Sub quotas, you can prevent and resolve RESOURCE_EXHAUSTED errors. Regularly monitor your usage and adjust your application logic to stay within limits. For more detailed information, refer to the Google Cloud Pub/Sub Quotas documentation.

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MORE ISSUES

Google Pub/Sub Messages are not being delivered in the expected order.

Message ordering is not enabled for the topic.

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The batch size in terms of bytes is too large for Google Pub/Sub to process.

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The batch size exceeds the maximum allowed limit.

Google Pub/Sub SCHEMA_COMPATIBILITY_ERROR

The message does not conform to the schema's compatibility requirements.

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The ordering key is invalid or not supported.

Google Pub/Sub INVALID_SCHEMA error encountered when publishing or subscribing to messages.

The schema configuration is invalid or unsupported.

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Google Pub/Sub INVALID_EXPIRATION_POLICY error encountered when configuring a subscription.

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The retry policy configuration is invalid.

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The dead letter policy configuration is invalid.

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The subscription has too many unacknowledged bytes.

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The topic name does not conform to the required format.

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The message was not acknowledged within the configured ack deadline.

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The operation is not implemented or not supported.

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Google Pub/Sub OUT_OF_RANGE error encountered during operation.

The operation was attempted past the valid range.

Google Pub/Sub Operation was cancelled unexpectedly.

The operation was cancelled, typically by the caller.

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An internal error occurred within the Pub/Sub service.

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The client does not have permission to access the requested resource.

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The batch size in terms of bytes is too large for Google Pub/Sub to process.

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The message does not conform to the schema's compatibility requirements.

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The specified schema does not exist in the Google Pub/Sub configuration.

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The schema configuration is invalid or unsupported.

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The specified dead letter topic does not exist.

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The dead letter policy configuration is invalid.

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The filter expression is too complex and exceeds the allowed complexity.

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The push endpoint server is not handling requests correctly.

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The retry policy configuration is invalid.

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The push endpoint URL is incorrect or the server is not running.

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The push endpoint URL is invalid or unreachable.

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The subscription has too many unacknowledged messages.

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The project has reached the maximum number of subscriptions allowed.

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The project has reached the maximum number of topics allowed.

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A topic with the same name already exists in the Google Pub/Sub service.

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Google Pub/Sub OUT_OF_RANGE error encountered during operation.

The operation was attempted past the valid range.

Google Pub/Sub Publisher client is being throttled.

Flow control settings are too restrictive.

Google Pub/Sub INVALID_ACK_ID error encountered when acknowledging messages in Google Pub/Sub.

The ack ID is invalid or does not exist.

Google Pub/Sub Duplicate acknowledgment ID error encountered.

The ack ID has already been acknowledged.

Google Pub/Sub ACK_DEADLINE_EXCEEDED

The message was not acknowledged within the configured ack deadline.

Google Pub/Sub TOPIC_DELETED error encountered when attempting to publish or subscribe to a topic.

The topic you are trying to access has been deleted.

Google Pub/Sub Subscription not found error when trying to access a Google Pub/Sub subscription.

The subscription has been deleted.

Google Pub/Sub The message exceeds the maximum allowed size.

The message payload is larger than the 10 MB limit set by Google Pub/Sub.

Google Pub/Sub Encountering the UNIMPLEMENTED error when using Google Pub/Sub.

The operation is not implemented or not supported.

Google Pub/Sub Operation rejected due to system state not meeting required preconditions.

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

Google Pub/Sub RESOURCE_EXHAUSTED error encountered when using Google Pub/Sub.

The project has exceeded its quota for the requested resource.

Google Pub/Sub PERMISSION_DENIED error encountered when accessing Google Pub/Sub resources.

The client does not have permission to access the requested resource.

Google Pub/Sub Operation aborted due to concurrency issue

The operation was aborted, typically due to a concurrency issue.

Google Pub/Sub NOT_FOUND error when accessing a Google Pub/Sub resource.

The specified resource does not exist.

Google Pub/Sub DEADLINE_EXCEEDED error encountered during Google Pub/Sub operations.

The operation took too long to complete.

Google Pub/Sub Operation was cancelled unexpectedly.

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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