How To Fix RT453 - CCMSPING communication error: System &1 host &2 unknown

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 453

• Message text: CCMSPING communication error: System &1 host &2 unknown

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 RT453 - CCMSPING communication error: System &1 host &2 unknown ?

  The SAP error message RT453 "CCMSPING communication error: System &1 host &2 unknown" typically indicates that the SAP system is unable to resolve the hostname of the target system specified in the configuration. This can occur in various scenarios, such as when monitoring systems using the CCMS (Computing Center Management System) or when trying to establish communication between SAP systems.
  Causes:
  
  DNS Resolution Issues: The hostname of the target system cannot be resolved to an IP address due to DNS misconfiguration.
  Incorrect Hostname: The hostname specified in the configuration might be incorrect or misspelled.
  Network Issues: There may be network connectivity issues preventing access to the target system.
  Firewall Restrictions: Firewalls may be blocking communication between the systems.
  SAP Configuration Issues: The configuration in the SAP system (like RFC destinations) may not be set up correctly.
  
  Solutions:
  
  
  Check Hostname:
  
  Verify that the hostname specified in the error message is correct. You can do this by checking the configuration in the SAP system (e.g., transaction SM59 for RFC destinations).
  
  
  
  DNS Configuration:
  
  Ensure that the DNS server is correctly configured and that the hostname can be resolved. You can test this by using the command line:
  
  On Windows: nslookup <hostname>
  On Unix/Linux: ping <hostname> or nslookup <hostname>
  
  
  
  
  
  Hosts File:
  
  If DNS is not being used, ensure that the /etc/hosts file (on Unix/Linux) or C:\Windows\System32\drivers\etc\hosts file (on Windows) contains the correct mapping of the hostname to the IP address.
  
  
  
  Network Connectivity:
  
  Check the network connectivity between the systems. You can use ping <hostname> to see if the target system is reachable.
  
  
  
  Firewall Settings:
  
  Ensure that any firewalls between the systems allow traffic on the required ports (e.g., port 3200 for SAP communication).
  
  
  
  SAP Configuration:
  
  Review the configuration in the SAP system, especially the RFC destinations and CCMS settings. Ensure that they are correctly set up to point to the right host and system.
  
  
  
  Restart Services:
  
  Sometimes, restarting the SAP services or the entire system can resolve transient issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To check and configure RFC destinations.
  RZ20: To monitor CCMS and check for alerts.
  
  
  
  Logs:
  
  Check the developer trace files (dev_* files) for more detailed error messages that might provide additional context.
  
  
  
  SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that might address specific issues related to CCMS and communication errors.
  
  
  
  By following these steps, you should be able to diagnose and resolve the RT453 error in your SAP environment.