How To Fix /IWXBE/CORE117 - MQTT channel '&3' published the QOS '&1' event '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 117

• Message text: MQTT channel '&3' published the QOS '&1' event '&2'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWXBE/CORE117 - MQTT channel '&3' published the QOS '&1' event '&2' ?

  The SAP error message /IWXBE/CORE117 related to MQTT (Message Queuing Telemetry Transport) channels typically indicates an issue with the Quality of Service (QoS) level for a published event. The message format suggests that there is a problem with the MQTT channel identified by &3, which is publishing an event with a specific QoS level &1 and event type &2.
  Cause:
  
  
  QoS Level Issues: The QoS level specified for the MQTT channel may not be supported or configured correctly. MQTT supports three QoS levels:
  
  QoS 0: At most once (fire and forget)
  QoS 1: At least once (guaranteed delivery)
  QoS 2: Exactly once (guaranteed delivery with no duplicates)
  
  
  
  Channel Configuration: The MQTT channel may not be properly configured in the SAP system, leading to issues when trying to publish messages.
  
  
  Network Issues: There could be network connectivity issues between the SAP system and the MQTT broker, causing the message to fail to publish.
  
  
  Broker Limitations: The MQTT broker may have limitations or restrictions on the QoS levels it supports or may be experiencing issues.
  
  
  Solution:
  
  
  Check QoS Configuration: Verify that the QoS level being used is supported by both the SAP system and the MQTT broker. Adjust the QoS level if necessary.
  
  
  Review Channel Settings: Go to the configuration settings for the MQTT channel in the SAP system and ensure that all parameters are set correctly, including the broker address, port, and authentication details.
  
  
  Test Connectivity: Ensure that there is proper network connectivity between the SAP system and the MQTT broker. You can use tools like ping or telnet to check connectivity.
  
  
  Monitor Broker Logs: Check the logs of the MQTT broker for any errors or warnings that might provide more context on why the message failed to publish.
  
  
  Update SAP Notes: Check for any relevant SAP Notes or updates that might address known issues with MQTT integration.
  
  
  Consult Documentation: Refer to the official SAP documentation for MQTT integration to ensure that all configurations are in line with best practices.
  
  
  Related Information:
  
  SAP Documentation: Look for specific documentation on MQTT integration within SAP, which may provide additional insights into configuration and troubleshooting.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed.
  MQTT Protocol Specifications: Familiarize yourself with the MQTT protocol specifications to better understand QoS levels and their implications.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance.