How To Fix ESH_FL_MSG178 - HTTP code 502: Bad gateway

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_FL_MSG - File Processing

• Message number: 178

• Message text: HTTP code 502: Bad gateway

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 ESH_FL_MSG178 - HTTP code 502: Bad gateway ?

  The SAP error message ESH_FL_MSG178 with the HTTP code 502: Bad Gateway typically indicates that there is an issue with the communication between servers or services in the SAP landscape. This error can occur in various scenarios, particularly when using SAP Enterprise Search or related services.
  Cause:
  
  Backend Service Unavailability: The backend service that the SAP system is trying to reach may be down or not responding.
  Network Issues: There could be network connectivity problems between the SAP system and the backend service.
  Configuration Issues: Incorrect configuration settings in the SAP system or the backend service can lead to this error.
  Load Balancer Issues: If a load balancer is used, it may not be routing requests correctly to the backend servers.
  Timeouts: The request may be timing out due to long processing times on the backend service.
  
  Solution:
  
  Check Backend Service: Ensure that the backend service is up and running. You can do this by accessing the service directly or checking its logs for any errors.
  Network Connectivity: Verify that there are no network issues between the SAP system and the backend service. This can include checking firewalls, routing, and DNS settings.
  Review Configuration: Check the configuration settings in the SAP system and the backend service to ensure they are correct. This includes checking the service URLs, authentication settings, and any relevant parameters.
  Load Balancer Configuration: If a load balancer is in use, ensure that it is configured correctly and that it is able to route requests to the appropriate backend servers.
  Increase Timeout Settings: If the backend service is taking too long to respond, consider increasing the timeout settings in the SAP system or the backend service.
  Check Logs: Review the logs of both the SAP system and the backend service for any error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  System Monitoring: Use SAP monitoring tools to keep an eye on system performance and service availability.
  Documentation: Refer to the official SAP documentation for Enterprise Search or the specific service you are using for more detailed troubleshooting steps.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.