[infinispan-issues] [JBoss JIRA] (ISPN-2889) AbstractIterator shouldn't allocate a larger result array than is necessary

[Marko Lukša (JIRA)]

     [ https://issues.jboss.org/browse/ISPN-2889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Marko Lukša updated ISPN-2889:
------------------------------

    Git Pull Request: https://github.com/infinispan/infinispan/pull/1701


Pull request is at https://github.com/infinispan/infinispan/pull/1701
                
> AbstractIterator shouldn't allocate a larger result array than is necessary
> ---------------------------------------------------------------------------
>
>                 Key: ISPN-2889
>                 URL: https://issues.jboss.org/browse/ISPN-2889
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Querying
>            Reporter: Marko Lukša
>            Assignee: Marko Lukša
>             Fix For: 5.3.0.Alpha1
>
>
> Currently {{AbstractIterator}} (superclass of LazyIterator and EagerIterator) always allocates an {{Object[]}} array of size {{fetchSize}}, even when the actual number of results is smaller than {{fetchSize}}. 
> This is especially problematic when the user wants to fetch all the results at once (by setting fetchSize to a very large number such as Integer.MAX_VALUE). This results in an OutOfMemoryError: Requested array size exceeds VM limit.
> Since the number of results is known up-front, {{AbstractIterator}} can allocate a smaller array.

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