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https://issues.apache.org/jira/browse/MYFACES-2840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12892265#action_12892265
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Bernd Bohmann commented on MYFACES-2840:
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Why can remove called during iterating over the attribute map?
> Use a copied Iterator instead of the real Enumeration in
> AbstractAttributeMap.AbstractAttributeIterator
> -------------------------------------------------------------------------------------------------------
>
> Key: MYFACES-2840
> URL: https://issues.apache.org/jira/browse/MYFACES-2840
> Project: MyFaces Core
> Issue Type: Task
> Affects Versions: 1.1.8, 1.2.9, 2.0.1
> Reporter: Jakob Korherr
> Assignee: Jakob Korherr
> Fix For: 1.1.9-SNAPSHOT, 1.2.10-SNAPSHOT, 2.0.2-SNAPSHOT
>
>
> We can use a copied version of the Enumeration from getAttributeNames() here,
> because directly using it might cause a ConcurrentModificationException when
> performing remove(). Note that we can do this since the Enumeration from
> getAttributeNames() will contain exactly the attribute names from the time
> getAttributeNames() was called and it will not be updated if attributes are
> removed or added.
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