ConcurrentModificationException while debugging server-side code while client is making RPC calls

Hello,

when debugging my server-side code - and only when debugging it - I receive a ConcurrentModificationException during this method:

 private void clean ()

 {

  Set<Map.Entry<String,Observator>> set = lst.entrySet();

  Iterator<Map.Entry<String,Observator>> itr = set.iterator ();

  while (itr.hasNext ())

  {

   Map.Entry<String,Observator> e = itr.next();

   

   Observator o = e.getValue();

  

   if (o.isOutdated())

    itr.remove();

  }

 }

Note that this server-side code is called repeatedly by the client inside as an RPC call a Timer.

When I run the application inside eclipse with Project -> Run As -> Web Application (Super Dev Mode), no exception occurrs.

When I debug it inside eclipse with Project -> Debug As -> Web Application (Super Dev Mode) without any breakpoints, no exception occurrs.

But when I debug while having breakpoints, the exception is thrown...

It seems to have something to do with stepping through server-side code while the client is making RPC calls...

How do you deal with such problems?

Thanks
Magnus

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