[Jetty-support] ConcurrentModificationExceptions in AbstractSessionManager (Jetty 6.1.5)

[Silvio B. <sbi...@ja...>]

Hello all,

I have seen these periodically in my system logs during the last two 
years. I am sure they where there when we used to run on Jetty5 but they 
still exist.

Does anyone else see these? I have never experienced erratic server 
behavior related to these exceptions so I guess they are not a real problem?

Kind regards,

Silvio Bierman


2007-10-15 19:45:59.075::WARN:  EXCEPTION
java.util.ConcurrentModificationException
       at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
       at java.util.HashMap$KeyIterator.next(Unknown Source)
       at 
org.mortbay.jetty.servlet.AbstractSessionManager$Session.invalidate(AbstractSessionManager.java:914) 

       at 
org.mortbay.jetty.servlet.AbstractSessionManager.scavenge(AbstractSessionManager.java:468) 

       at 
org.mortbay.jetty.servlet.AbstractSessionManager.access$600(AbstractSessionManager.java:62) 

       at 
org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger.run(AbstractSessionManager.java:1084) 

       at 
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475) 

2007-10-15 19:46:59.440::WARN:  EXCEPTION
java.util.ConcurrentModificationException
       at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
       at java.util.HashMap$KeyIterator.next(Unknown Source)
       at 
org.mortbay.jetty.servlet.AbstractSessionManager$Session.invalidate(AbstractSessionManager.java:914) 

       at 
org.mortbay.jetty.servlet.AbstractSessionManager.scavenge(AbstractSessionManager.java:468) 

       at 
org.mortbay.jetty.servlet.AbstractSessionManager.access$600(AbstractSessionManager.java:62) 

       at 
org.mortbay.jetty.servlet.AbstractSessionManager$SessionScavenger.run(AbstractSessionManager.java:1084) 

       at 
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:475)