How To Fix CSM_VMC025 - Number of VMs in "sticky" mode

CSM_VMC025 - Overview

• Message type: E = Error

• Message class: CSM_VMC - Messages for VM Container Monitoring

• Message number: 025

• Message text: Number of VMs in "sticky" mode

What causes this issue?

"Sticky" mode means that a Java virtual machine has been permanently
assigned to a user context. If a VM has this operating mode, all
requests for the assigned user context can only be processed in this VM.
As a result, this VM, provided the associated Java session (and the user
context too) is not closed, is not available to other transactions and
users. (The ABAP analogon is the PRIV mode of work processes.)
A VM enters the "sticky" mode if within a client request the memory size
of the user context (Java session) exceeds the defined value
<DS:KENO.E43B6C44FA33B04DE10000000A42425B>Memory parameters</>).
You can control the behavior in the VMC system administration (SM53) by
setting the value in the view "Sitzungen".
You can find more information in the online documentation
<DS:KENO.001560AA0E081DEB91FD8250BEB8055A>VMC System Administration</>
(transaction SM53).

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?

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 CSM_VMC025 - Number of VMs in "sticky" mode ?

  The SAP error message CSM_VMC025 indicates that the number of virtual machines (VMs) in "sticky" mode has reached its limit. This typically occurs in environments where SAP systems are deployed on virtualized infrastructure, such as SAP HANA on VMware or other cloud platforms.
  
  Cause:
  The "sticky" mode refers to a configuration where certain VMs are bound to specific physical hosts or resources to ensure performance consistency and reduce latency. The error message CSM_VMC025 suggests that the maximum number of VMs that can be in this sticky mode has been exceeded. This can happen due to:
  
  Resource Limitations: The infrastructure may have a predefined limit on the number of VMs that can be in sticky mode.
  
  Configuration Issues: Incorrect settings in the virtualization management layer or SAP configuration.
  Increased Load: An unexpected increase in the number of VMs being deployed in sticky mode due to scaling or other operational changes.
  
  
  Solution:
  To resolve the CSM_VMC025 error, consider the