How To Fix /IWXBE/CORE125 - MQTT channel connecting - MQTT client reconnection error

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 125

• Message text: MQTT channel connecting - MQTT client reconnection 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/CORE125 - MQTT channel connecting - MQTT client reconnection error ?

  The SAP error message /IWXBE/CORE125 related to MQTT (Message Queuing Telemetry Transport) indicates that there is an issue with the MQTT client trying to reconnect to the MQTT broker. This can occur due to various reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Possible Causes:
  
  
  Network Issues: There may be network connectivity problems between the SAP system and the MQTT broker. This could be due to firewall settings, network outages, or incorrect network configurations.
  
  
  Broker Unavailability: The MQTT broker may be down or not reachable. This could be due to maintenance, crashes, or configuration issues on the broker side.
  
  
  Authentication Issues: If the MQTT broker requires authentication (username/password or certificates), incorrect credentials can lead to connection failures.
  
  
  Configuration Errors: Incorrect configuration settings in the SAP system for the MQTT client, such as wrong broker address, port number, or protocol settings.
  
  
  Resource Limitations: The MQTT broker may be reaching its connection limits, preventing new connections from being established.
  
  
  Protocol Mismatch: The MQTT version or protocol settings used by the client may not be compatible with those supported by the broker.
  
  
  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 to the broker's IP address and port.
  
  
  Verify Broker Status: Check if the MQTT broker is running and accessible. If you have access to the broker, check its logs for any errors or issues.
  
  
  Review Authentication Credentials: Ensure that the credentials used for connecting to the MQTT broker are correct. If using certificates, verify that they are valid and properly configured.
  
  
  Check Configuration Settings: Review the configuration settings in the SAP system for the MQTT client. Ensure that the broker address, port, and other settings are correct.
  
  
  Monitor Resource Usage: If you suspect resource limitations, check the MQTT broker's logs and metrics to see if it is reaching its connection limits or experiencing high load.
  
  
  Update Protocol Settings: Ensure that the MQTT client and broker are using compatible versions and settings. If necessary, update the client or broker configuration to match.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to MQTT connectivity.
  Broker Documentation: Refer to the documentation of the MQTT broker you are using for specific configuration and troubleshooting guidelines.
  Logs: Review both the SAP logs and the MQTT broker logs for any additional error messages or warnings that could provide more context on the issue.
  
  By systematically checking these areas, you should be able to identify and resolve the MQTT client reconnection error in your SAP environment.