How To Fix /IWXBE/CORE118 - MQTT channel error during publishing event

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 118

• Message text: MQTT channel error during publishing event

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /IWXBE/CORE118 - MQTT channel error during publishing event ?

  The SAP error message /IWXBE/CORE118 related to MQTT (Message Queuing Telemetry Transport) channels typically indicates an issue during the publishing of an event. This error can arise from various causes, and understanding the context is crucial for troubleshooting. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Network Issues: Connectivity problems between the SAP system and the MQTT broker can lead to this error.
  Broker Configuration: The MQTT broker may not be configured correctly to accept connections or messages from the SAP system.
  Authentication/Authorization Failures: If the MQTT broker requires authentication, incorrect credentials can cause publishing failures.
  Message Format Issues: The message being published may not conform to the expected format or size limits set by the broker.
  Resource Limitations: The SAP system or the MQTT broker may be experiencing resource constraints (e.g., memory, CPU).
  Version Compatibility: Incompatibility between the SAP system and the MQTT broker version can lead to communication issues.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can reach the MQTT broker. Use tools like ping or telnet to verify connectivity.
  Review Broker Configuration: Verify that the MQTT broker is correctly configured to accept connections from the SAP system. Check for any IP whitelisting or firewall rules that may block access.
  Validate Credentials: If the broker requires authentication, ensure that the correct username and password are being used. Check for any changes in credentials.
  Inspect Message Format: Review the message being published to ensure it adheres to the expected format and size limits. Adjust the message if necessary.
  Monitor Resource Usage: Check the resource usage on both the SAP system and the MQTT broker. If either is under heavy load, consider optimizing performance or scaling resources.
  Check Logs: Review the logs on both the SAP system and the MQTT broker for any additional error messages or warnings that could provide more context.
  Update Software: Ensure that both the SAP system and the MQTT broker are running compatible versions. If necessary, update to the latest versions.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for MQTT integration for specific configuration and troubleshooting guidelines.
  MQTT Broker Documentation: Check the documentation for the specific MQTT broker being used (e.g., Mosquitto, HiveMQ) for any known issues or configuration tips.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they found effective.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed logs and error messages for a more in-depth analysis.