How To Fix /IWXBE/CORE123 - MQTT channel error - MQTT connection error

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 123

• Message text: MQTT channel error - MQTT connection error

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWXBE/CORE123 - MQTT channel error - MQTT connection error ?

  The SAP error message /IWXBE/CORE123 MQTT channel error - MQTT connection error typically indicates that there is an issue with the MQTT (Message Queuing Telemetry Transport) connection in the SAP system. This error can arise due to various reasons, including network issues, configuration problems, or issues with the MQTT broker.
  Causes:
  
  Network Issues: The SAP system may not be able to reach the MQTT broker due to network connectivity problems.
  Broker Configuration: The MQTT broker may not be configured correctly, or it may not be running.
  Authentication Issues: If the MQTT broker requires authentication, incorrect credentials can lead to connection failures.
  Firewall Restrictions: Firewalls may be blocking the necessary ports for MQTT communication.
  Protocol Mismatch: The version of the MQTT protocol being used may not be compatible between the SAP system and the broker.
  Resource Limitations: The broker may be overloaded or have reached its connection limit.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can reach the MQTT broker. You can use tools like ping or telnet to test connectivity.
  Verify Broker Status: Make sure that the MQTT broker is running and properly configured. Check the broker logs for any errors.
  Review Configuration Settings: Double-check the configuration settings in the SAP system for the MQTT connection, including the broker address, port, and authentication details.
  Check Firewall Settings: Ensure that the necessary ports (usually 1883 for MQTT) are open and not blocked by any firewalls.
  Update Credentials: If authentication is required, verify that the correct username and password are being used.
  Monitor Broker Load: If the broker is overloaded, consider scaling up resources or optimizing the load.
  Consult Documentation: Refer to the SAP documentation and the MQTT broker documentation for specific configuration and troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide patches related to MQTT connectivity.
  MQTT Broker Documentation: Review the documentation for the specific MQTT broker you are using (e.g., Mosquitto, HiveMQ, etc.) for configuration and troubleshooting tips.
  Logs: Examine the logs in both the SAP system and the MQTT broker for more detailed error messages that can provide insights into the issue.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support or your MQTT broker's support for further assistance.