RemoveAll doesn't remove all elements

Hey All,
I'm having an issue with removeAll not removing all the element every time. Sometimes it does, and sometimes it seems to miss one or two.
I am holding a number of Message objects in a TreeSet, and have other TreeSet's that also contain Message object's.
messages.removeAll(c.getMessageList());
Basically what i have is a message list for each "channel", and an object that can hold the messages of multiple channels in it, so when that channel is enabled, i add the messages from the specific channel, and remove them when they are disabled.
The issue is that some seem to linger sometimes, but then i can play with it for a while, disabling and reenabling the channel, and it will remove the message after a couple tries. I debugged it, and saw that the list i was removing did contain the same object i was removing from, but it didnt remove it.
This is probably really confusing, so please let me know what i need to clarify.
THanks,
Philippe

The weird thing is that the 2 it didnt remove were in the middle of the set. If it was synchronization issues, i'd expect it to be at the end.It's a red-black-tree (balanced), so it makes a some sense. But I'd still expect a call to removeAll() to reset the internal state completely by replacing the root node.
EDIT: I should really be reading the posts completely.. I was thinking about clear(), sorry :d
PS. would it be just as efficent to just recreate the Overall or container set every time, instead of just removing the ones that are no longer enabled, cause that would fix the problem also.Well, marginally less efficient, but generally you don't have the possibility to replace the set whereever it is referenced..
With kind regards
Ben
Edited by: BenSchulz on Feb 15, 2008 10:13 PM

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