ConcurrentLinkedQueue won't remove
<p>I'd like to know in which case a ConcurrentLinkedQueue can't remove an element from its Collections. The item exists, it is inside the collection but calling</p>

<pre><code>SomeConcurrentLinkedQueue.remove(item)
</code></pre>

<p>won't remove this item from the collection. Is the collection locked or something ?</p>
