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https://issues.apache.org/jira/browse/DERBY-6857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15130059#comment-15130059
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Knut Anders Hatlen commented on DERBY-6857:
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For the record, the build failure is not limited to Windows. I'm seeing it
consistently on Debian with JDK >= 8u60. And the failing Jenkins jobs run on
Ubuntu.
It looks like it's an intentional change:
[JDK-8073372|https://bugs.openjdk.java.net/browse/JDK-8073372] - Redundant
CONSTANT_Class entry not generated for inlined constant.
> Deprecate support for building Derby under JDKs 6 and 7
> -------------------------------------------------------
>
> Key: DERBY-6857
> URL: https://issues.apache.org/jira/browse/DERBY-6857
> Project: Derby
> Issue Type: Bug
> Components: Build tools
> Affects Versions: 10.13.0.0
> Reporter: Rick Hillegas
> Attachments: ClassReferenceReader.java, Windows-sane-TypeId.class,
> classReferenceComparison.txt, derby-6857-01-aa-remove6and7.diff,
> derby-6857-02-aa-cleanupOldJdks.diff, derby-6857-03-aa-minimumVersion.diff,
> derby-6857-04-aa-pruneConstantClasses.diff, jardriftcheck.diff,
> mac-derby-jar-verbose.txt, mac-sane-TypeId.class,
> windows-derby-jar-verbose.txt
>
>
> The community voted to stop supporting Java 6 and 7 as of release 10.13. See
> the 2015-09-12 entry here: http://wiki.apache.org/db-derby/VoteResults. We no
> longer need to support building Derby with those JDKs. This issue tracks
> changes needed to remove that support and simplify the build.
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