100% CPU from javaw.exe

[Delion]

When starting DSHub r.330 or r.333,few minutes later,when almost all my users (120-150) connected, process javaw.exe starts using almost 100% CPU.
Original Iota version works normally. Latest Java installed. The same situation after Java reinstall and reboot.
With Process Explorer I can see: two msvsr71.dll threads of javaw.exe (there are many) using more 45-50 more % CPU.
What it can be?

[Pietry (pietry)]

I have no idea why there should be a msvsr71.dll since that is a microsoft visual studio library. Also, this doesn;t happen to me or to anybody else. Unless someone else can confirm this bug, it's incomplete.

[Pietry (pietry)]

I believe you don't have a Sun Java, but a Microsoft one. DSHub requires Sun Java.

[Delion (delion)]

No,I have exactly Sun Java (http://java.sun.com/javase/downloads/index.jsp).
Screenshot with monster javaw.exe is attached.

[Delion (delion)]

+
It starts only when more then 124 users are connected.

[Delion (delion)]

Yes.
Exactly when more then 124 users connected. When less - no CPU overload.