> 300 oracle sessions whom contain some with more than 400.000 seconds in w

Hey everyone,

we just use the built in Vaadin SQL functionalities like FreeformQuery and TableQuery. However, we’ve recognized that we’ve a lot of inactive oracle sessions (more than 300) which are more than 4 days old.
What may cause this problem and how to analyze its source?

Edit: a restart of tomcat terminates these sessions btw.

Thanks and regards,