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https://issues.apache.org/jira/browse/JCRVLT-155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15839631#comment-15839631
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Konrad Windszus commented on JCRVLT-155:
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The underlying reason why this returns {{true}} although the package has been
replaced is that the state is transferred from the old to the new package
during upload in
https://github.com/apache/jackrabbit-filevault/blob/938f7a2179a01342e6f367f93fc708fc064a8b08/vault-core/src/main/java/org/apache/jackrabbit/vault/packaging/impl/JcrPackageManagerImpl.java#L359.
> JcrPackage.isInstalled does not return false in case the package has been
> overwritten
> -------------------------------------------------------------------------------------
>
> Key: JCRVLT-155
> URL: https://issues.apache.org/jira/browse/JCRVLT-155
> Project: Jackrabbit FileVault
> Issue Type: Bug
> Components: Packaging
> Affects Versions: 3.1.28
> Reporter: Konrad Windszus
>
> Although the javadoc of {{o.a.j.v.packaging.JcrPackage#isInstalled()}} is
> stating
> bq. Checks if this package is installed. Note: the default implementation
> only checks the JcrPackageDefinition.getLastUnpacked() date. If the package
> is replaced since it was installed. this method will return false.
> this method is returning {{true}} in case the package has been reuploaded in
> between (with the same group, package name and version). This is violating
> the contract of this method.
> Please either fix implementation or javadoc description.
> That issue already lead to downstream issues in the
> {{com.adobe.granite.installer.factory.packages.impl.PackageTransformer}}
> which therefore only installs a package once.
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