How To Fix ESH_HANA_FL_ADMIN004 - HTTP/HTTPS communication is not available

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_HANA_FL_ADMIN - ESH HANA File Loader

• Message number: 004

• Message text: HTTP/HTTPS communication is not available

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 ESH_HANA_FL_ADMIN004 - HTTP/HTTPS communication is not available ?

  The SAP error message ESH_HANA_FL_ADMIN004 indicates that there is an issue with HTTP/HTTPS communication in the context of the SAP Enterprise Search (ESH) and HANA system. This error typically arises when the system is unable to establish a connection to the HANA database or when the necessary services are not running or configured correctly.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP application server and the HANA database.
  Service Not Running: The HANA database service may not be running or may have crashed.
  Incorrect Configuration: The HTTP/HTTPS settings in the SAP system may be misconfigured.
  Firewall Restrictions: Firewalls or security groups may be blocking the required ports for communication.
  SSL Configuration Issues: If HTTPS is being used, there may be issues with SSL certificates or configurations.
  HANA Instance Down: The specific HANA instance that the application is trying to connect to may be down.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the application server can reach the HANA database server on the required port (default is 30015 for HANA).
  
  
  
  Verify HANA Service Status:
  
  Log in to the HANA database and check if the database service is running. You can use the HANA Studio or command line tools to verify the status.
  Restart the HANA service if necessary.
  
  
  
  Review Configuration Settings:
  
  Check the HTTP/HTTPS settings in the SAP system. Ensure that the correct URLs and ports are configured in the relevant settings (e.g., in the SAP Gateway or in the ESH configuration).
  Ensure that the HANA database connection settings in the SAP system are correct.
  
  
  
  Check Firewall Settings:
  
  Ensure that there are no firewall rules blocking the communication between the SAP application server and the HANA database server.
  
  
  
  SSL Configuration:
  
  If using HTTPS, verify that the SSL certificates are correctly installed and configured. Check for any certificate expiration issues.
  Ensure that the SSL settings in the SAP system are correctly configured.
  
  
  
  Check HANA Instance:
  
  If you have multiple HANA instances, ensure that the correct instance is up and running and that the application is trying to connect to the right one.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional troubleshooting steps or patches related to this error.
  Logs: Review the application server logs and HANA logs for any additional error messages that may provide more context on the issue.
  Documentation: Refer to the official SAP documentation for ESH and HANA for configuration guidelines and best practices.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.