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Reliance on {{ConcurrentModificationException}} is insufficient to stop side effects resulting from modifying an underlying Collection while simultaneously iterating over the collection. The fail-fast behavior may occur only after processing an arbitrary number of elements. In _Java Concurrency
In Practice_ \[[Goetz 2006|AA. Bibliography#Goetz 06]\], Göetz et al. note "\[Fail-fast iterators\] are implemented by associating a modification count with the collection: if the modification count changes during iteration, {{hasNext}} or {{next}} throws {{ConcurrentModificationException}}. However, this check is done without synchronization, so there is a risk of seeing a stale value of the modification count and therefore that the iterator does not realize a modification has been made. This was a deliberate design tradeoff to reduce the performance impact of the concurrent modification detection code". |
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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="f32162efa81b1cb0-1ad038b9-4e064a88-b5d79c14-c1cd16ca97e3da273ca1327e"><ac:plain-text-body><![CDATA[ | [[SDN 2008 | AA. Bibliography#SDN 08]] | [Sun Bug database, Bug ID:6687277 | http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6687277] | ]]></ac:plain-text-body></ac:structured-macro> |
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="a8e18d9cd9750c0b-ee29a83e-40cc45bd-b6e79911-175490c7b45e8dcafb1dd46c"><ac:plain-text-body><![CDATA[ | [[Goetz 2006 | AA. Bibliography#Goetz 06]] | 5.1.2. Iterators and Concurrentmodificationexception | ]]></ac:plain-text-body></ac:structured-macro> |
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