How To Fix GW249 - Active connection table is full; log on again later

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 249

• Message text: Active connection table is full; log on again later

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 GW249 - Active connection table is full; log on again later ?

  The SAP error message GW249: Active connection table is full; log on again later typically indicates that the maximum number of active connections to the SAP Gateway has been reached. This can happen due to various reasons, such as a high number of concurrent users, long-running sessions that are not being terminated, or configuration limits that have been set too low.
  Causes:
  
  High User Load: A large number of users trying to connect to the SAP system simultaneously can exhaust the available connections.
  Long-Running Sessions: Sessions that are not properly terminated can occupy connections for extended periods.
  Configuration Limits: The SAP Gateway may have a limit set on the number of active connections, which can be reached if not configured appropriately.
  Network Issues: Problems in the network can lead to connections not being released properly.
  Resource Constraints: Insufficient system resources (CPU, memory) can lead to performance issues, causing connections to hang.
  
  Solutions:
  
  
  Increase Connection Limits:
  
  You can increase the maximum number of connections allowed by adjusting the parameters in the SAP Gateway configuration. This can be done by modifying the gw/actv_con parameter in the instance profile.
  Example: If the current value is set to 200, you might increase it to 300 or more, depending on your system's capacity.
  
  
  
  Monitor and Terminate Idle Sessions:
  
  Use transaction SM04 to monitor active user sessions. Identify and terminate any sessions that are no longer needed.
  You can also use transaction SM50 to check for long-running processes that may be holding onto connections.
  
  
  
  Review System Performance:
  
  Check system performance metrics to ensure that the server has adequate resources. If necessary, consider upgrading hardware or optimizing the system.
  
  
  
  Network Configuration:
  
  Ensure that network configurations are optimized and that there are no issues causing connections to hang.
  
  
  
  Regular Maintenance:
  
  Implement regular maintenance procedures to clean up old sessions and connections. This can include scheduling jobs to monitor and terminate idle sessions.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may provide additional guidance or patches related to this issue.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM04: User Overview - to see active users and their sessions.
  SM50: Process Overview - to monitor running processes.
  SM21: System Log - to check for any related error messages or warnings.
  
  
  
  SAP Parameters:
  
  gw/actv_con: Maximum number of active connections.
  gw/max_conn: Maximum number of connections allowed.
  
  
  
  Documentation: Refer to the SAP Help Portal or the SAP Community for more detailed information on managing SAP Gateway connections.
  
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.