I am having a problem with a client's XServe running FileMaker Server 11.0v5 where FM Pro connections lock up.
FileMaker Pro apps go unresponsive.
I am pretty sure it is ESS related. We are using the ActualTech open source ODBC drives pointing to an external data source set up by the client's web developer, on WPEngine.com
The problem starts when navigating through records on the ESS based layouts.
The problems coincide with the switch from a different development web server where ESS was performing reliably.
Latest version of the Actual Tech driver installed.