Workaround for IIS servicing the application pool with a critical error when communicating with Windows process Activation service

System Environment: Windows Server R2 64-bit, IIS 7.0

Error message:

The process that serviced the application pool encountered a fatal error while communicating with the Windows process Activation service. The process ID is. Application pools are automatically disabled because of a series of errors in the process that provides services for this application pool.

Causes the Web site to be inaccessible, a 503 error occurs, the service is unavailable, and the services unavailable.

The workaround:

1. Set the application pool to classical Classic mode, if it is pure. NET application, this step can not be done)

2. Enable 32-bit support for application pools

Workaround for IIS servicing the application pool with a critical error when communicating with Windows process Activation service