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https://issues.apache.org/jira/browse/MBUILDCACHE-47?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17704991#comment-17704991
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Maximilian Novikov commented on MBUILDCACHE-47:
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could you please attach the buildinfo files from .m2/cache, 1st and 2nd
re-build(without changes)
you can check the diff of buildinfo files to see why the checksum is
recalculated
> Extension computes a new check sum for a project with multiple modules
> without any changes
> ------------------------------------------------------------------------------------------
>
> Key: MBUILDCACHE-47
> URL: https://issues.apache.org/jira/browse/MBUILDCACHE-47
> Project: Maven Build Cache Extension
> Issue Type: Bug
> Components: remote build cache
> Reporter: Venelin Koulaxazov
> Priority: Critical
>
> I have a maven project with 2 modules and a parent pom as such
> {code:java}
> <modules>
> <module>api</module>
> <module>service</module>
> </modules> {code}
> I would like to take advantage of the maven cache extension and I've added it
> in the build section of the parent pom as such
> {code:java}
> <extensions>
> <extension>
> <groupId>org.apache.maven.extensions</groupId>
> <artifactId>maven-build-cache-extension</artifactId>
> <version>1.0.0</version>
> </extension>
> </extensions> {code}
> I've also added a maven-build-cache-config.xml file however it would seem
> that every time I run {{mvn clean package}} a different checksum is generated
> for my submodules and as a result I don't actually benefit from the caching
> since all my java files are in those submodules
> I've tried multiple configs with no luck unfortunately
> {code:java}
> <?xml version="1.0" encoding="UTF-8" ?>
> <cache xmlns="http://maven.apache.org/BUILD-CACHE-CONFIG/1.0.0";
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:schemaLocation="http://maven.apache.org/BUILD-CACHE-CONFIG/1.0.0
> http://maven.apache.org/xsd/cache-config-1.0.0.xsd";>
> <configuration>
> <enabled>true</enabled>
> <hashAlgorithm>XX</hashAlgorithm>
> </configuration>
> <input>
> <global>
> <glob>{*.java,*.xml,*.properties}</glob>
> <includes>
> <include>recursive=api/*</include>
> <include>recursive=service/*</include>
> </includes>
> </global>
> </input>
> </cache> {code}
> How can I make this extension actually cache the contents of my submodules
> with the same checksum if there haven't been changes. I know this extension
> is fairly recent and I haven't been able to find any hits online.
> *EDIT*
> Commenting one of the child modules out, actually ended up working and the
> cache is kicking in correctly. Is it possible there's a limitation to the
> extension in that it scans for a single module?
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