After you deploy AEM 6.0 Forms FP1 on WebSphere 8.5.5, you may experience a 3mn delay in starting your Application Server instance.
If you look in the SystemOut.log, you will find warnings related to a hung thread:
WSVR0605W: Thread "WebContainer : 2" (000001a3) has been active for 715740 milliseconds and may be hung. There is/are 1 thread(s) in total in the server that may be hung
Followed by this message:
CWNBV0005W: A validation.xml file was found for the/xxxx/xxx.ear/xxx.war module. However, that validation.xml file is not configured for validation; therefore this XML file is ignored
There is an issue with Bean Validation affecting WebSphere ApplicationServer 8.5.5 as described in PM85921:
http://www-01.ibm.com/support/docview.wss?uid=swg1PM85921
In order to resolve this, you need to install Fix Pack 1 or 2 available from IBM:
WebSphere Application Server V8.5.5 Fix Pack 1
http://www-01.ibm.com/support/docview.wss?uid=swg24035935
WebSphere ApplicationServer V8.5.5 Fix Pack 2
http://www-01.ibm.com/support/docview.wss?uid=swg24037250
You might also notice the same behavior on WebSphere ApplicationServer 8.0, fix included in Fix Pack 8:
WebSphere Application Server V8.0 Fix Pack 8