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https://issues.apache.org/jira/browse/HBASE-10607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15825053#comment-15825053
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stack commented on HBASE-10607:
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Ugh. Ran into this just now in spite if bit added to refguide. Dang.
> [JDK8] NoSuchMethodError involving ConcurrentHashMap.keySet if running on JRE
> 7
> -------------------------------------------------------------------------------
>
> Key: HBASE-10607
> URL: https://issues.apache.org/jira/browse/HBASE-10607
> Project: HBase
> Issue Type: Task
> Reporter: Andrew Purtell
> Priority: Trivial
> Attachments: 10607.txt
>
>
> If you try running HBase built with Java 8 on a Java 7 JRE, then processes
> will fail early with:
> {noformat}
> java.lang.NoSuchMethodError:
> java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/ConcurrentHashMap$KeySetView;
> {noformat}
> I came across this incidentally. I suppose we should consider documenting
> this in the manual in the Troubleshooting section.
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