[infinispan-issues] [JBoss JIRA] (ISPN-7656) DefaultDataContainer.entrySet().stream().toArray(Object[]::new) may fail

[Radim Vansa (JIRA)]

Radim Vansa created ISPN-7656:
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             Summary: DefaultDataContainer.entrySet().stream().toArray(Object[]::new) may fail
                 Key: ISPN-7656
                 URL: https://issues.jboss.org/browse/ISPN-7656
             Project: Infinispan
          Issue Type: Bug
          Components: Core
            Reporter: Radim Vansa
            Assignee: William Burns


When the default Spliterator estimates size of the array, it calls {{DefaultDataContainer.EntrySet#size()}} that returns directly the size of container (including expired entries). Then the container is iterated using {{ImmutableEntryIterator}} which excludes expired entries by default, and this may return less elements than the original size() provided. That causes failure like this:

{code}
java.lang.IllegalStateException: End size 1 is less than fixed size 2
	at java.util.stream.Nodes$FixedNodeBuilder.end(Nodes.java:1232)
	at java.util.stream.Sink$ChainedReference.end(Sink.java:258)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:545)
	at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260)
	at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:438)
{code}

Note that this can also happen without expiration upon concurrent modification. We have to adjust the characteristics (remove {{#SIZED}}) of provided spliterators.



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