Last monday a customer reports the error SRVE0190E and 404 errors appearing sometimes for some users. After reading lots of trace the error was caused by the following:
The customer has one IBM HTTP Server in front of two cells. One cell is WAS Cluster and another is Portal Cluster. The websphere pluging-cfg.xml is merged and then deployed on the HTTP Server.
Reading the trace i discovered that the customer has two applications with the same context root installed.
Solution: Change the context root of one application.