The system is running on:
Xeon X5482 @ 3.2Ghz, Hyper-threading disabled
8Gb RAM
Windows XP x64
Hudson 1.323

It is configured to poll SVN once a minute for 2 projects. The authentication is
done via active-directory.

After a few days of running, Java start to use the whole CPU power available.
Investigation showed up that there are 4 threads (one per core) running all the
time. All these threads are having the same dump:

"RequestHandlerThread0" daemon prio=6 tid=0x0000000009b10000 nid=0x54574
runnable [0x000000000c51f000..0x000000000c51f860]
java.lang.Thread.State: RUNNABLE
at java.util.HashMap.put(HashMap.java:376)
at java.util.HashSet.add(HashSet.java:200)
at winstone.WinstoneSession.addUsed(WinstoneSession.java:112)
at winstone.WinstoneRequest.getSession(WinstoneRequest.java:1320)
at
winstone.auth.FormAuthenticationHandler.validatePossibleAuthenticationResponse(FormAuthenticationHandler.java:216)
at
winstone.auth.BaseAuthenticationHandler.processAuthentication(BaseAuthenticationHandler.java:85)
at
winstone.auth.FormAuthenticationHandler.processAuthentication(FormAuthenticationHandler.java:99)
at
winstone.RequestDispatcher.continueAfterSecurityCheck(RequestDispatcher.java:349)
at winstone.RequestDispatcher.forward(RequestDispatcher.java:323)
at winstone.RequestHandlerThread.processRequest(RequestHandlerThread.java:244)
at winstone.RequestHandlerThread.run(RequestHandlerThread.java:150)
at java.lang.Thread.run(Thread.java:619)