IIS Worker Process Availability
Applies To: Windows Server 2008 R2
Internet Information Services (IIS) worker processes serve an application pool and can be in a starting, running, stopping, or unknown state. In IIS 7.0 and IIS 7.5, worker processes are managed by WAS (the Windows Process Activation Service). If a worker process fails to respond, it may be recycled by WAS.
Events
| Event ID | Source | Message |
|---|---|---|
Microsoft-Windows-IIS-WMSVC |
The worker process for app pool '%1', PID='%2', failed to initialize the http.sys communication when asked to start processing http requests and therefore will be considered ill by W3SVC and terminated. The data field contains the error number. | |
Microsoft-Windows-IIS-WMSVC |
The worker process failed to initialize correctly and therefore could not be started. The data is the error. | |
Microsoft-Windows-IIS-W3SVC-WP |
The worker process failed to load the process model host. If this was during the launch of a queue the W3SVC will consider this worker process ill. The data is the error. | |
Microsoft-Windows-IIS-W3SVC-WP |
The worker process failed to start http request processing. A previous event log message may contain more information. The data is the error. | |
Microsoft-Windows-IIS-W3SVC-WP |
The worker process failed to start servering a queue for protocol %1. The data is the error. | |
Microsoft-Windows-IIS-WMSVC |
The Module DLL %1 failed to load. The data is the error. | |
Microsoft-Windows-IIS-WMSVC |
The worker process failed to initialize communication with the W3SVC and therefore could not be started. The data is the error. | |
Microsoft-Windows-IIS-WMSVC |
The Module DLL '%1' could not be loaded due to a configuration problem. The current configuration only supports loading images built for a %2 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see https://go.microsoft.com/fwlink/?LinkId=29349. | |
Microsoft-Windows-IIS-W3SVC-WP |
The worker process failed to pre-load .Net Runtime version %1. | |
Microsoft-Windows-IIS-W3SVC-WP |
The worker process cannot access the CLR configuration file at '%1'. Verify that the file exists and that the worker process has read access to the file. | |
Microsoft-Windows-IIS-W3SVC-WP |
There was an error during application preload for configuration path '%1'. The error will be ignored. The data is the error. | |
Microsoft-Windows-IIS-W3SVC-WP |
There was an error during application preload for configuration path '%1'. The worker process will be marked unhealthy and will be shutdown. The data is the error. | |
Microsoft-Windows-IIS-W3SVC-WP |
There was an unexpected error during application preload for application pool: '%1'. Some application preloads may not have been processed correctly. Please check the configuration for preload for the application(s) assigned to this application pool. The data is the error. | |
Microsoft-Windows-IIS-W3SVC-WP |
There was an unexpected error during the loading of managed runtime version '%1'. The managed runtime loader '%2' was unable to load the managed runtime. The data is the error. | |
Microsoft-Windows-WAS |
The Windows Process Activation Service failed to create a worker process for the application pool '%1'. The data field contains the error number. | |
Microsoft-Windows-WAS |
The Windows Process Activation Service failed to add the worker process '%1' to the job object representing application pool '%2'. The data field contains the error number. | |
Microsoft-Windows-WAS |
Windows Process Activation Service encountered an error trying to track worker process '%1' that belongs to app pool '%2'. This will result in this worker process not showing up in global queries enumerating all worker processes. It will also disable clients from being able to directly create a WORKER_PROCESS object to monitor this worker process. A client can see find this worker process by querying all worker processes in the app pool that this process belongs to. The data field contains the error number. |