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

[Marko Lukša (JIRA)]

Marko Lukša created ISPN-2889:
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             Summary: 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


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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