[jetty-users] Jetty5: CPU-Usage Problem

[Maximilian Böhm <maximilian.boehm@xxxxxxxxxxx>]

Hi Guys,

We are running jetty5 on approximately ~50 server upwards. Mostly there are more than 40 virtualhosts on a machine.

Now we have a 100% cpu-usage on two of this servers. We already switched the hardware to virtualisation and now I replaced all regulary programfiles from files of a working server.

Through ps -eLf and jstack I found the following (never ending) Thread:

"SocketListener0-7" prio=10 tid=0x0000000001eb7000 nid=0x5d7a runnable [0x00007f569b2fc000]
   java.lang.Thread.State: RUNNABLE
        at java.lang.Throwable.fillInStackTrace(Native Method)
        at java.lang.Throwable.fillInStackTrace(Throwable.java:782)
        - locked <0x00000000d1b33c60> (a java.lang.IllegalMonitorStateException)
        at java.lang.Throwable.<init>(Throwable.java:250)
        at java.lang.Exception.<init>(Exception.java:54)
        at java.lang.RuntimeException.<init>(RuntimeException.java:51)
        at java.lang.IllegalMonitorStateException.<init>(IllegalMonitorStateException.java:50)
        at org.mortbay.util.DateCache.format(DateCache.java:250)
        - locked <0x00000000ddc05c90> (a org.mortbay.util.DateCache)
        at org.mortbay.http.HttpRequest.getTimeStampStr(HttpRequest.java:154)
        at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:937)
        at org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
        at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
        at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
        at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)

What can cause this?
I know, jetty5... Upgrading and so on. We work on it. We made a mistake ealier, integrating jetty too deep into our software...

Best regards & Thanks
Max Böhm