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https://issues.apache.org/jira/browse/GROOVY-5936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-5936.
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> java.lang.OutOfMemoryError through Iterator.collectEntries and others (part
> 2: handle others)
> ---------------------------------------------------------------------------------------------
>
> Key: GROOVY-5936
> URL: https://issues.apache.org/jira/browse/GROOVY-5936
> Project: Groovy
> Issue Type: Bug
> Components: groovy-jdk
> Affects Versions: 2.0.4
> Reporter: Alexander Veit
> Assignee: Paul King
> Fix For: 2.5.0-alpha-1
>
>
> DGM.collectEntries(Iterator, ...) naively calls toList(Iterator<T> self) to
> convert the Iterator to a list. There's no need to do this since iterator
> suffices to collect the entries. Even worse, toList uses ArrayList what may
> lead to multiple reallocations when the ArrayList's capacity must be enlarged.
> Error:
> Caught: java.lang.OutOfMemoryError: GC overhead limit exceeded
> The same problems may occur when calling other methods that internally
> convert Iterator to lists.
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