How To Fix RT720 - No connection exists to the J2EE Server

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 720

• Message text: No connection exists to the J2EE Server

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT720 - No connection exists to the J2EE Server ?

  The SAP error message RT720, which states "No connection exists to the J2EE Server," typically indicates that there is an issue with the connection between the SAP system and the Java-based J2EE server. This can occur in various scenarios, such as when trying to access a web application or service that relies on the J2EE server.
  Causes:
  
  Server Down: The J2EE server may be down or not running.
  Network Issues: There may be network connectivity issues between the SAP system and the J2EE server.
  Configuration Issues: Incorrect configuration settings in the SAP system or the J2EE server can lead to connection problems.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection to the J2EE server.
  Incorrect URL: The URL used to connect to the J2EE server may be incorrect or outdated.
  Resource Limitations: The J2EE server may be experiencing resource limitations (e.g., memory, CPU) that prevent it from accepting new connections.
  
  Solutions:
  
  Check Server Status: Ensure that the J2EE server is up and running. You can do this by accessing the server directly or checking its status through monitoring tools.
  Network Connectivity: Verify that there are no network issues. You can use tools like ping or traceroute to check connectivity between the SAP system and the J2EE server.
  Review Configuration: Check the configuration settings in both the SAP system and the J2EE server. Ensure that the connection parameters (like host, port, and protocol) are correct.
  Firewall Settings: Review firewall settings to ensure that they are not blocking the connection to the J2EE server. You may need to allow specific ports or IP addresses.
  Correct URL: Verify that the URL used to connect to the J2EE server is correct. Update it if necessary.
  Resource Monitoring: Monitor the resource usage on the J2EE server to ensure it is not overloaded. If it is, consider scaling resources or optimizing the application.
  Logs and Traces: Check the logs on both the SAP system and the J2EE server for any error messages or warnings that could provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RT720 for any specific patches or updates that may address this issue.
  Documentation: Review the official SAP documentation for both the SAP system and the J2EE server for configuration and troubleshooting guidelines.
  Support: If the issue persists, consider reaching out to SAP support for further assistance, providing them with detailed logs and error messages.
  
  By following these steps, you should be able to diagnose and resolve the RT720 error effectively.