Unable to resolve artifact from Apache Snapshots repository.

[TheFlagCourier]

Currently, unable to resolve artifacts from the Apache Snapshots Repository, which is needed to download snapshot versions of maven plugins (in our case, the maven-shade-plugin).

Please provide:

• Link to build log from https://jitpack.io

  • https://jitpack.io/com/github/TownyAdvanced/Towny/b2258fe01a/build.log

• Does the project build on your machine with the same commands (e.g. ./gradlew install) ?

  • Yes, project runs fine locally via .\mvnw clean install - Even after deleting the %USERPROFILE%/.m2/repository/ folder.

• What error are you seeing?

  • Build fails to resolve artifact from the Apache Snapshots repository (https://repository.apache.org/snapshots/)

    [INFO] Downloading from apache.snapshots: https://repository.apache.org/snapshots/org/apache/maven/plugins/maven-shade-plugin/3.3.1-SNAPSHOT/maven-metadata.xml
    [WARNING] Could not transfer metadata org.apache.maven.plugins:maven-shade-plugin:3.3.1-SNAPSHOT/maven-metadata.xml from/to apache.snapshots (https://repository.apache.org/snapshots/): transfer failed for https://repository.apache.org/snapshots/org/apache/maven/plugins/maven-shade-plugin/3.3.1-SNAPSHOT/maven-metadata.xml
    [WARNING] org.apache.maven.plugins:maven-shade-plugin:3.3.1-SNAPSHOT/maven-metadata.xmlfailed to transfer from https://repository.apache.org/snapshots/ during a previous attempt. This failure was cached in the local repository and resolution will not be reattempted until the update interval of apache.snapshots has elapsed or updates are forced. Original error: Could not transfer metadata org.apache.maven.plugins:maven-shade-plugin:3.3.1-SNAPSHOT/maven-metadata.xml from/to apache.snapshots (https://repository.apache.org/snapshots/): transfer failed for https://repository.apache.org/snapshots/org/apache/maven/plugins/maven-shade-plugin/3.3.1-SNAPSHOT/maven-metadata.xml
    [INFO] Downloading from apache.snapshots: https://repository.apache.org/snapshots/org/apache/maven/plugins/maven-shade-plugin/3.3.1-SNAPSHOT/maven-shade-plugin-3.3.1-SNAPSHOT.pom
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD FAILURE
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time:  04:22 min
    [INFO] Finished at: 2022-01-22T17:19:15Z
    [INFO] ------------------------------------------------------------------------
    [ERROR] Plugin org.apache.maven.plugins:maven-shade-plugin:3.3.1-SNAPSHOT or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-shade-plugin:jar:3.3.1-SNAPSHOT: Could not transfer artifact org.apache.maven.plugins:maven-shade-plugin:pom:3.3.1-SNAPSHOT from/to apache.snapshots (https://repository.apache.org/snapshots/): transfer failed for https://repository.apache.org/snapshots/org/apache/maven/plugins/maven-shade-plugin/3.3.1-SNAPSHOT/maven-shade-plugin-3.3.1-SNAPSHOT.pom: Connect to repository.apache.org:443 [repository.apache.org/136.243.146.148] failed: Connection timed out -> [Help 1]

Pom File: https://github.com/TownyAdvanced/Towny/blob/b2258fe01a2471005c5b23444b70d0b6330e92e4/pom.xml

Thank you!

[jitpack-io]

Hi

It appears we are being rate limited. Perhaps one way to work around this is to download from JitPack https://jitpack.io/#apache/maven-shade-plugin

[TheFlagCourier]

Thanks for the response, that kind of sucks the life out of it.

Unfortunately, I don't think recursing back to Jitpack to retrieve the maven-shade-plugin is a viable solution, unless there's a workaround for bypassing the InvalidPluginDescriptorException from the DefaultMavenPluginManager. With the following maven configuration, locally I am running into the exception on the package phase.

Configuration

<pluginRepositories>
    <pluginRepository>
        <id>jitpack.io</id>
        <url>https://jitpack.io/</url>
    </pluginRepository>
</pluginRepositories>
<build>
    <plugins>
        <plugin>
            <groupId>com.github.apache</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>d2bdd60a11</version> <!-- Current latest commit on master branch -->
        </plugin>
    </plugins>
</build>

Excpetion

[ERROR] Invalid plugin descriptor for com.github.apache:maven-shade-plugin:d2bdd60a11
    (%USERPROFILE%\.m2\repository\com\github\apache\maven-shade-plugin\d2bdd60a11\maven-shade-plugin-d2bdd60a11.jar),
    Plugin's descriptor contains the wrong group ID: org.apache.maven.plugins,
    Plugin's descriptor contains the wrong version: 3.3.1-SNAPSHOT -> [Help 1]

<stack trace snipped>

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/InvalidPluginDescriptorException

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