How To Fix SCLNT_HTTP404 - ICM memory request failed (ICM_HTTP_NO_MORE_MEMORY)

SAP Error Message - Details

• Message type: E = Error

• Message class: SCLNT_HTTP - Messages for HTTP Client for Respective Error Code

• Message number: 404

• Message text: ICM memory request failed (ICM_HTTP_NO_MORE_MEMORY)

What causes this issue?

A memory request in ICM failed.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the ICM trace file. Check the buffer settings of the system and
the ICM configuration.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SCLNT_HTTP404 - ICM memory request failed (ICM_HTTP_NO_MORE_MEMORY) ?

  The SAP error message SCLNT_HTTP404 ICM memory request failed (ICM_HTTP_NO_MORE_MEMORY) indicates that the Internet Communication Manager (ICM) in the SAP system has run out of memory to handle HTTP requests. This can occur due to various reasons, such as high traffic, memory leaks, or insufficient memory allocation for the ICM.
  Causes:
  
  High Traffic: A sudden spike in the number of HTTP requests can exhaust the available memory.
  Memory Leaks: Inefficient handling of memory in the application or in the ICM itself can lead to memory not being released properly.
  Configuration Issues: The ICM may not be configured with sufficient memory limits to handle the expected load.
  Resource Limits: Operating system-level limits on memory usage can also contribute to this issue.
  
  Solutions:
  
  
  Increase Memory Allocation:
  
  Adjust the ICM memory settings in the SAP profile parameters. You can increase the icm/HTTP/max_request_size and icm/HTTP/number_of_requests parameters to allow for more concurrent requests and larger request sizes.
  Example parameters to check:
  
  icm/HTTP/number_of_requests
  icm/HTTP/max_request_size
  icm/HTTP/max_connections
  
  
  
  
  
  Monitor and Optimize Traffic:
  
  Use monitoring tools to analyze traffic patterns and identify any unusual spikes or patterns that could be causing the issue.
  Implement load balancing if necessary to distribute traffic more evenly across multiple instances.
  
  
  
  Check for Memory Leaks:
  
  Review the application code and any custom developments for potential memory leaks.
  Use SAP's memory analysis tools (like transaction ST02 or ST06) to monitor memory usage and identify any leaks.
  
  
  
  Restart ICM:
  
  As a temporary measure, restarting the ICM can free up memory and resolve the issue until a more permanent solution is implemented.
  
  
  
  System Resources:
  
  Ensure that the underlying operating system has sufficient resources (RAM, CPU) available for the SAP instance.
  Check for any OS-level memory limits that might be affecting the SAP instance.
  
  
  
  SAP Notes and Support:
  
  Check for any relevant SAP Notes that may address this specific error or provide patches and updates that could resolve underlying issues.
  If the problem persists, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  Monitoring Tools: Use transaction codes like ST02 (Buffer Monitor), ST06 (Operating System Monitor), and SM50 (Work Process Overview) to monitor system performance and memory usage.
  SAP Documentation: Refer to the official SAP documentation for detailed information on configuring ICM and managing memory settings.
  Performance Tuning: Regularly review and tune the performance of your SAP system to ensure it can handle the expected load efficiently.
  
  By following these steps, you should be able to diagnose and resolve the ICM_HTTP_NO_MORE_MEMORY error effectively.