I guess you will have to give more details about that.
- Does vaadin sampler leak memory ?
- Does the “hello world” vaadin sample leak memory ?
- Can you make a small application which leaks memory ?
- Does it only happen after you open a specific page containing a specific component ?
- Does it leak memory after a user action (button click, …) or just leaving the application for some time increases the memory use ?
- What plugins are you using ? Does it happen if they are disabled ?
- …
