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https://issues.apache.org/jira/browse/OPENJPA-2492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13976409#comment-13976409
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Romain Manni-Bucau commented on OPENJPA-2492:
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if you look j8 CHM implementation, containsKey does a get != null. So calling
it from our proxy inproxied get method (beforeGet) creates an infinite loop ->
keySet is a workaround. Using delegation would have made it cleaner but needs
more refactoring.
> TestConcurrentMap error with Java 8
> -----------------------------------
>
> Key: OPENJPA-2492
> URL: https://issues.apache.org/jira/browse/OPENJPA-2492
> Project: OpenJPA
> Issue Type: Sub-task
> Components: build / infrastructure, Enhance, jpa
> Affects Versions: 2.4.0
> Environment: Java 8
> java version "1.8.0"
> Java(TM) SE Runtime Environment (build 1.8.0-b132)
> Java HotSpot(TM) Client VM (build 25.0-b70, mixed mode)
> Reporter: Kevin Sutter
> Assignee: Kevin Sutter
> Attachments: OPENJPA-2492.patch
>
>
> One more test failure while running with Java 8. Since Java 8 introduced
> some new methods on the Map interface, this is probably related. We are
> getting a VerifyError related to the keySet signature:
> Tests in error:
> testConcurrentMap001(org.apache.openjpa.persistence.relations.TestConcurrentMap)
> <error message="(class:
> org/apache/openjpa/util/java$util$concurrent$ConcurrentHashMap$4$proxy,
> method: keySet signature:
> ()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;) Wrong return type in
> function" type="java.lang.VerifyError">java.lang.VerifyError: (class:
> org/apache/openjpa/util/java$util$concurrent$ConcurrentHashMap$4$proxy,
> method: keySet signature:
> ()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;) Wrong return type in
> function
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:340)
> at
> org.apache.openjpa.util.GeneratedClasses.loadBCClass(GeneratedClasses.java:68)
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