There is a memory leak in the gsoap/openssl library when SSL caching is enabled. IOFilterVP SSL cache consumes heap memory for each SSL session (for each VASA API request). Eventually, it consumes all the memory from the iofiltervp resource pool.
These error messages are found that the host is encountering an issue with an I/O filter in a server environment.
This seems to involve a problem with accessing or processing a virtual device filter or an I/O filter driver.
This issue will be fixed in the below versions:
Workaround:
As a workaround, restart the IOFilterVP service.
Verify that no disk or virtual device has become unresponsive or disconnected.
The error mentions an "Admission failure," which could point to resource allocation issues such as CPU, memory, or storage resources being insufficient for processing the I/O filter requests.
You may need to check resource utilization (esxtop) to confirm if there are any resource contention issues.
Restart the I/O Filter Service
If the issue is related to a service (such as ioFilterVPServer), you may want to try restarting the service responsible for managing the I/O filters.
This might resolve temporary connectivity or resource allocation problems.
Please go through the steps to perform the same
/etc/init.d/iofiltervpd status
/etc/init.d/iofiltervpd restart