IWP and PHP web services do not work at the same time
FMP12 Advanced Server
Operating system version
Description of the issue
My Filemaker server provides php, IWP and database services on a two machine configuration. Since upgrading from Filemaker Server 11 Advanced to Filemaker Server 12 Advanced, there appears to be a bug that makes web access to move from responsive to unresponsive, and back again at a fairly consistent interval ~ roughly three to five minutes.
While php is accessible, you cannot access IWP. Five minutes later you can access IWP and not php, and so on.
Stopping and starting web services on the web server, with from either the terminal or the GUI, creates a situation where Filemaker php web services initially take precedence over IWP.
Stopping and starting web services via the admin console, gives IWP precedence over php.
Exact text of any error message(s) that appear
Depending on the context, you will receive either a error dialog stating:
"Database not Available" [IWP]
"Error: 802 - Unable to open file" [Filemaker error code via PHP]