How To Fix /IWXBE/CORE181 - MQTT channel error while sending subscribe request(s).

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 181

• Message text: MQTT channel error while sending subscribe request(s).

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWXBE/CORE181 - MQTT channel error while sending subscribe request(s). ?

  The SAP error message /IWXBE/CORE181 related to MQTT (Message Queuing Telemetry Transport) channels typically indicates an issue with the subscription request being sent to the MQTT broker. This error can arise due to various reasons, including configuration issues, network problems, or broker-related issues.
  Causes:
  
  Configuration Issues: Incorrect configuration of the MQTT channel in SAP can lead to subscription errors. This includes incorrect broker address, port, or authentication details.
  Network Issues: Network connectivity problems between the SAP system and the MQTT broker can prevent successful communication.
  Broker Unavailability: The MQTT broker may be down or not reachable, leading to failed subscription requests.
  Authentication Failures: If the MQTT broker requires authentication (username/password) and the provided credentials are incorrect, the subscription will fail.
  Protocol Mismatch: The MQTT version or protocol settings may not be compatible between the SAP system and the broker.
  Resource Limitations: The broker may have reached its limit for active connections or subscriptions.
  
  Solutions:
  
  Check Configuration: Verify the MQTT channel configuration in SAP. Ensure that the broker address, port, and authentication details are correct.
  Test Network Connectivity: Use tools like ping or telnet to check if the SAP system can reach the MQTT broker on the specified port.
  Broker Status: Ensure that the MQTT broker is running and accessible. Check the broker logs for any errors or issues.
  Review Authentication: If authentication is required, double-check the credentials being used. Ensure that the user has the necessary permissions to subscribe to the topics.
  Protocol Compatibility: Ensure that the MQTT version and settings used in SAP are compatible with those of the broker.
  Monitor Resource Usage: Check the MQTT broker for any resource limitations or connection limits that may be causing the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes or documentation that may address known issues or provide updates related to MQTT integration.
  Broker Documentation: Refer to the documentation of the MQTT broker being used for specific configuration and troubleshooting guidelines.
  Logs and Traces: Enable logging in SAP and the MQTT broker to capture detailed error messages that can help in diagnosing the issue.
  Community Forums: Engage with SAP community forums or support channels for additional insights and assistance from other users who may have encountered similar issues.
  
  If the problem persists after checking these areas, consider reaching out to SAP support for further assistance.