Product:
Cognos TM1 10.2.2
PLANANALYTICS_Update_version=PLANANALYTICS-AW64-ML-RTM-10.2.5240.167-0
Microsoft Windows 2012 R2 Server

Problem:
Error message when surf to PMHUB at http://windowsserver.domain.se:9510/pmhub/pm/admin

Error message:
HTTP Status 500 – Servlet.init() for servlet equinoxbridgeservlet threw exception

Solution:
Go to IBM Cognos Configuration for TM1 on the server.
Right click on TM1 Applications server and select STOP.
(You can also stop the IBM Cognos TM1 Application server from the Windows Services)
Delete folder pmhub at C:\Program Files\IBM\cognos\tm1_64\tomcat\work\Catalina\localhost\pmhub
Start TM1 Applications Server from inside IBM Cognos Configuration program.

This will recreate the application in TOMCAT and it will work again.

When you apply a FIX PACK to TM1 you must;
Stop the services.
Delete the config.ini file found in folder C:\Program Files\IBM\cognos\tm1_64\tomcat\work\Catalina\localhost\pmhub\eclipse\configuration\
Open Cognos Configuration and click SAVE.
Then you can start the TM1 services again.