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https://issues.apache.org/jira/browse/LUCENE-2333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12847309#action_12847309
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Uwe Schindler commented on LUCENE-2333:
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I am working now on a third patch that also solves the dependency problems. The
idea is to not only check if the dependant contrib's jar file is there, more to
check if it is actual. So replace all <available/> tasks in contribs to
<uptodate/>: [http://ant.apache.org/manual/CoreTasks/uptodate.html], first
example is the best how to do this.
> Failures during contrib builds, when classes in core were changed without ant
> clean
> -----------------------------------------------------------------------------------
>
> Key: LUCENE-2333
> URL: https://issues.apache.org/jira/browse/LUCENE-2333
> Project: Lucene - Java
> Issue Type: Bug
> Components: Build
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Fix For: 3.1
>
> Attachments: shai-compile-fix.patch, shai-compile-fix2.patch
>
>
> From java-dev by Shai Erera:
> {quote}
> I've noticed that sometimes, after I run test-core and test-contrib, and then
> change core code, test-contrib fail on NoSuchMethodError and stuff like that.
> I've noticed that core.jar exists under build, and I assumed it's used by
> test-contrib, and probably is not recreated after core code has changed.
> I verified it when looking in contrib-build.xml, which defines a property
> lucene.jar.present which is set to true if the jar is ... well, present.
> Which I believe is the reason for these failures. I've been thinking how to
> resolve that, and I can think of two ways:
> (1) have test-core always delete that file, but that has two issues:
> (1.1) It's redundant if the code hasn't changed.
> (1.2) It forces you to either jar-core or test-core before you test-contrib,
> if you want to make sure you run w/ the latest jar.
> or
> (2) have test-contrib always call jar-core, which will first delete the file
> and then re-create it by compiling first. Compiling should not do anything if
> the code hasn't changed. So the only waste would be to create the .jar, but I
> think that's quite fast?
> Does anyone, with more Ant skills than me, know of a better way to detect
> from test-contrib that core code has changed and only then rebuild the jar?
> {quote}
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