Seems a lot of the problems is because of logging. The SocketHubAppender causes 
the most of the problems.

A lot of threads is waiting for a lock:

  | "http-0.0.0.0-8080-53" daemon prio=1 tid=0x671b8858 nid=0x5cf1 waiting for 
monitor entry [0x5ff97000..0x5ff98670]
  |         at org.apache.log4j.Category.callAppenders(Category.java:185)
  |         - waiting to lock <0x7160bb18> (a org.apache.log4j.Logger)
  | 


One thread is waiting in socket write for some reason and makes all logging 
threads block.


  | "http-0.0.0.0-8080-14" daemon prio=1 tid=0x08abd560 nid=0x5c8d runnable 
[0x688a4000..0x688a57f0]
  |         at java.net.SocketOutputStream.socketWrite0(Native Method)
  |         at 
java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
  | 

found this by using kill -3  on the Java process.

/Börje

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