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https://issues.apache.org/jira/browse/DERBY-6856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15946283#comment-15946283
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Rick Hillegas commented on DERBY-6856:
--------------------------------------
I logged the javadoc-building problem as
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8177692. It has been
closed as a duplicate of another bug which is still open:
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8176901
> Make it possible to build Derby using JDK 9
> -------------------------------------------
>
> Key: DERBY-6856
> URL: https://issues.apache.org/jira/browse/DERBY-6856
> Project: Derby
> Issue Type: Improvement
> Components: Build tools
> Affects Versions: 10.12.1.1
> Reporter: Rick Hillegas
> Attachments: derby-6856-01-ab-addShardingKey.diff,
> derby-6856-01-ac-cleanup.diff, derby-6856-02-aa-addShardingKey.diff,
> derby-6856-03-aa-autoboxingDeprecationWarnings.diff,
> derby-6856-03-ab-autoboxingDeprecationWarnings.diff,
> derby-6856-04-aa-autoboxingDeprecationWarnings-part2.diff,
> derby-6856-04-ab-autoboxingDeprecationWarnings-part2.diff,
> derby-6856-05-ac-roundingMode-Class.newInstance.diff,
> derby-6856-05-af-roundingMode-Class.getDeclaredConstructor.diff,
> derby-6856-05-ag-roundingMode-Class.newInstance.diff,
> derby-6856-06-aa-observable.diff, derby-6856-07-aa-oneMoreNewInstance.diff,
> derby-6856-08-aa-cleanupJavadoc.diff, derby-6856-09-aa-javadocEntities.diff,
> derby-6856-10-aa-disable-permissions-subverting-test.diff,
> derby-6856-11-aa-jigsawResourceLocation.diff, derby-6856-XX-ab-base.diff,
> derby-6856-XX-ac-base.diff, derby-6856-XX-ad-base.diff, PTest.java,
> ptestScript
>
>
> Derby can't be built with JDK 9. Java 9 introduces new JDBC classes like
> java.sql.ShardingKey and methods which refer to these new classes.
> In addition, project Jigsaw has created a new way to name classes (see
> http://openjdk.java.net/jeps/220). This breaks the PropertySetter build tool
> which we use so that old JVMs can compile Derby and so that Derby can be
> compiled to run on old JVMs.
> It is likely that we will need to leave this issue open throughout the
> development cycle of Java 9.
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