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https://issues.apache.org/jira/browse/QPID-6412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14336485#comment-14336485
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ASF subversion and git services commented on QPID-6412:
-------------------------------------------------------
Commit 1662211 from [~k-wall] in branch 'qpid/trunk'
[ https://svn.apache.org/r1662211 ]
QPID-6412: Use ConcurrentMap interface rather than concrete class to ensure
linking issues when running JDK 1.8 compiled code under JDK 1.7
> Declare variables as ConcurrentMap not ConcurrentHashMap to avoid issues
> after compiling on Java 8
> --------------------------------------------------------------------------------------------------
>
> Key: QPID-6412
> URL: https://issues.apache.org/jira/browse/QPID-6412
> Project: Qpid
> Issue Type: Improvement
> Components: Java Broker, Java Client, Java Common
> Affects Versions: 0.32
> Reporter: Keith Wall
> Assignee: Keith Wall
> Fix For: 6.0 [Java]
>
>
> Java 8 redefines the method keySet() on ConcurrentHashMap to return a
> narrower type than the standard return type given in the Map interface. If
> the code is compiled in Java 8 and then run under Java 7 this causes linking
> issues.
> Avoid these issues by always declaring variables in terms of the interface
> ConcurrentMap
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