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https://issues.apache.org/jira/browse/COLLECTIONS-330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721254#action_12721254
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Sebb commented on COLLECTIONS-330:
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Also, the tests both still fail even if the iter.remove() call is commented
out, but they then fail on the iter.next().
If the map.get() call is commented out, leaving just iter.remove(), the test
works fine in single-threaded and multi-threaded mode.
Looks like the get() is not maintaining expectedModCount.
> ConcurrentModificationException using remove from the keySet the LRUMap
> -----------------------------------------------------------------------
>
> Key: COLLECTIONS-330
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-330
> Project: Commons Collections
> Issue Type: Bug
> Components: Collection
> Affects Versions: 3.3
> Reporter: Joerg Schaible
>
> Even if the access to a LRUMap is synced and the remove method of the
> iterator is used that has been returned from the keySet of the LRUMap, it is
> possible to get a ConcurrentModificationException. This does not happen for
> remove of the iterators returned by the entrySet or values of the LRUMap. See
> currently not executed unit test in TestLRUMap (marked as TODO for
> COLLECTION-3).
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