After a number of web applications have been created in the SharePoint 2010 farm, further attempts to create a new web application through Central Administration result in the following:
The creation process results in a 'Page cannot be displayed' message.
The web application is only provisioned on the Central Administration server.
Additionally, you may see Event ID 5013 in the application event logs of the SharePoint Server.
As more and more web applications are created, the time in which it takes to create a web application increases. As part of the creation process, IIS is reset and by default, the application pool allows 90 seconds for the connections to close off before forcibly shutting down. When the number of web applications grows above 10, 90 seconds is not enough time for the provisioning to finish.
As a result, the w3wp process is killed and the provisioning process is stopped prior to the timer jobs being created.
The solution to this is to allow the process a longer amount of time before it is forcibly shutdown.
On the server(s) hosting Central Admin, open IIS manager.
In the tree view, expand the server name and click on Application Pools.
Locate the SharePoint Central Administration v4 application pool. Right click on it and choose Advanced Settings.
In the Process Model section, set the Shutdown Time Limit to a greater value. As an example, 300.
404 'Page not found'; Web application