Message Service:FAQ

If you receive an error message when using MNS products, error Codes the matching error message. For other issues, you can identify the issues and solutions based on the following categories:

Introduction

• What is MNS?

• Use MNS

• Scenarios of MNS

• What is the Account ID?

• What are the endpoints of MNS in each region?

• What operations does MNS provide?

• What are the limits of topics?

• Indicates whether MNS supports long polling.

• Whether MNS provides first-in-first-out (FIFO) access to messages

• Can MNS be used in collaboration with other Alibaba Cloud products?

• What are the advantages of MNS over self-developed, commercial, or open-source message queue systems?

Billing

• Specifies whether to continue billing after the queue is deleted.

• Specifies whether to continue billing after the topic is deleted.

FAQ about messages

• You cannot receive messages after a successful subscription.

• "message not exist" error reported when deleting a message

• The HttpEndpoint interface cannot receive the message.

• The HTTP endpoint signature authentication failed.

• How to improve the authentication performance of the HTTP Endpoint interface

• Failed to receive message body when using PHP to write an HttpEndpoint interface

• The server returns the Error "[Error Code]:InvalidRequestURL, [Message]:Http request URL format invalid".

• How messages are identified in the system

• MNS ensures that multiple consumers access the same message queue to prevent message loss or repeated consumption of messages.

• The number of times each message is consumed

• How to configure MNS to support a longer message retention period

• How to configure MNS to support larger message sizes

• Which of the following messages are specified as the number of messages, active messages, and delayed messages?

• Can I use MNS to send or receive multiple messages at a time?

• Does a message have a priority of 1

FAQ about queues

• Are queues with the same name in different regions the same queue?

• Process a queue that has no messages for a long period of time

SDK

• Download the SDK

• "[Error Code]:403 AccessDenied [Message]:The OwnerId that your Access Key Id associated to is forbidden for this operation." when the ECS instance operating system fails to start

API

• How do I use the MNS API?

• Why is my signature always missing

• "403 SignatureDoesNotMatch" is returned for an MNS API request.

• When The API is called, "[Error Code]:403 AccessDenied [Message]:The OwnerId that your Access Key Id associated to is forbidden for this operation." when the ECS instance operating system fails to start

Security

• How can I confirm that the public key certificate address in the message service MNS push request is an Alibaba Cloud official

• How to ensure that messages in my message queue are secure

• How to ensure the reliability of data stored in MNS