How To Fix /IWXBE/CORE182 - MQTT channel error while sending unsubscribe request(s).

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 182

• Message text: MQTT channel error while sending unsubscribe 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/CORE182 - MQTT channel error while sending unsubscribe request(s). ?

  The SAP error message /IWXBE/CORE182 related to MQTT (Message Queuing Telemetry Transport) channels typically indicates an issue when the system is trying to send an unsubscribe request. This can occur in scenarios where SAP is integrated with IoT services or other systems that utilize MQTT for messaging.
  Possible Causes:
  
  Network Issues: There may be connectivity problems between the SAP system and the MQTT broker, leading to failed unsubscribe requests.
  Broker Configuration: The MQTT broker may not be configured correctly to handle unsubscribe requests, or it may be experiencing issues.
  Client ID Issues: The client ID used for the MQTT connection may not be valid or may have been disconnected.
  Session Expiry: The session associated with the MQTT connection may have expired, causing the unsubscribe request to fail.
  Resource Limitations: The MQTT broker may be hitting resource limits (e.g., maximum connections, memory issues) that prevent it from processing unsubscribe requests.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the SAP system can communicate with the MQTT broker. You can use tools like ping or telnet to verify connectivity.
  Review Broker Logs: Check the logs of the MQTT broker for any errors or warnings that might indicate why the unsubscribe request failed.
  Validate Client ID: Ensure that the client ID used for the MQTT connection is valid and that the connection is still active.
  Reconnect if Necessary: If the session has expired, try reconnecting to the MQTT broker and then resend the unsubscribe request.
  Broker Configuration: Review the configuration of the MQTT broker to ensure it is set up to handle unsubscribe requests properly.
  Monitor Resource Usage: Check the resource usage of the MQTT broker to ensure it is not overloaded. If it is, consider scaling the broker or optimizing its configuration.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches and updates.
  MQTT Documentation: Review the documentation for the MQTT broker you are using to understand its limitations and configuration options.
  SAP Community: Engage with the SAP Community forums to see if other users 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 to facilitate troubleshooting.