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https://issues.apache.org/jira/browse/MNG-6358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364887#comment-16364887
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Guillaume Boué commented on MNG-6358:
-------------------------------------
The Velocity call is made when downloading the licence for each library used in
the Maven distributable. [The code is
here|https://github.com/apache/maven/blob/maven-3.5.2/apache-maven/src/main/appended-resources/META-INF/LICENSE.vm#L38].
Most of those is the Apache License 2.0, for which the download perhaps could
be skipped, but some aren't: check out the 3.5.2 distributable, you'll find the
recap in the {{LICENSE}} file, and the individual licenses in {{lib/*.license}}
folder (at least of those that were downloaded successfully, like the Eclipse
Public License).
> Maven build should not require access to apache.org
> ---------------------------------------------------
>
> Key: MNG-6358
> URL: https://issues.apache.org/jira/browse/MNG-6358
> Project: Maven
> Issue Type: Bug
> Components: Bootstrap & Build
> Affects Versions: 3.5.2
> Environment: RHEL 7.4
> JDK 1.8.0_141
> Reporter: Adam John Burley
> Priority: Minor
>
> I am trying to build Maven 3.5.2 from source using Maven 3.0.5. The machine I
> am building on has access to an internal Maven repository, but doesn't have
> access to the Internet.
> The build fails, seemingly because it cannot access {{apache.org}} to
> download the license. But I don't understand why it needs to do this, as the
> license is already contained in file {{apache-jar-resource-bundle}} which is
> retrieved as a Maven dependency.
> Here is the log I get:
> {code}
> [INFO] --- apache-rat-plugin:0.11:check (rat-check) @ apache-maven ---
> [INFO] 51 implicit excludes (use -debug for more details).
> [INFO] Exclude: src/test/resources*/**
> [INFO] Exclude: src/test/projects/**
> [INFO] Exclude: src/test/remote-repo/**
> [INFO] Exclude: **/*.odg
> [INFO] Exclude: src/bin/m2.conf
> [INFO] Exclude: bootstrap/**
> [INFO] Exclude: README.bootstrap.txt
> [INFO] Exclude: .repository/**
> [INFO] Exclude: .maven/spy.log
> [INFO] Exclude: .java-version
> [INFO] Exclude: README.md
> [INFO] Exclude: DEPENDENCIES
> [INFO] 19 resources included (use -debug for more details)
> [INFO] Rat check: Summary of files. Unapproved: 0 unknown: 0 generated: 0
> approved: 16 licence.
> [INFO]
> [INFO] --- maven-dependency-plugin:2.8:unpack-dependencies
> (unpack-jansi-native) @ apache-maven ---
> [INFO] Unpacking
> /root/.m2/repository/org/fusesource/jansi/jansi/1.16/jansi-1.16.jar to
> /tmp/maven-build/apache-maven/target/dependency with includes
> "META-INF/native/**" and excludes ""
> [INFO]
> [INFO] --- maven-remote-resources-plugin:1.5:process (default) @ apache-maven
> ---
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Reactor Summary:
> [INFO]
> [INFO] Apache Maven ...................................... SUCCESS [25.091s]
> [INFO] Maven Model ....................................... SUCCESS [18.000s]
> [INFO] Maven Artifact .................................... SUCCESS [4.418s]
> [INFO] Maven Plugin API .................................. SUCCESS [4.677s]
> [INFO] Maven Builder Support ............................. SUCCESS [1.900s]
> [INFO] Maven Model Builder ............................... SUCCESS [5.690s]
> [INFO] Maven Settings .................................... SUCCESS [1.905s]
> [INFO] Maven Settings Builder ............................ SUCCESS [2.010s]
> [INFO] Maven Repository Metadata Model ................... SUCCESS [1.511s]
> [INFO] Maven Artifact Resolver Provider .................. SUCCESS [5.110s]
> [INFO] Maven Core ........................................ SUCCESS [13.168s]
> [INFO] Maven SLF4J Simple Provider ....................... SUCCESS [5.013s]
> [INFO] Maven Embedder .................................... SUCCESS [3.617s]
> [INFO] Maven Compat ...................................... SUCCESS [4.462s]
> [INFO] Apache Maven Distribution ......................... FAILURE [4:18.467s]
> [INFO]
> ------------------------------------------------------------------------
> [INFO] BUILD FAILURE
> [INFO]
> ------------------------------------------------------------------------
> [INFO] Total time: 5:58.134s
> [INFO] Finished at: Mon Feb 12 21:03:11 GMT 2018
> [INFO] Final Memory: 83M/190M
> [INFO]
> ------------------------------------------------------------------------
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process (default)
> on project apache-maven: Error rendering velocity resource. Invocation of
> method 'getResourceAsFile' in class
> org.codehaus.plexus.resource.DefaultResourceManager threw exception
> org.codehaus.plexus.resource.loader.ResourceNotFoundException: Could not find
> resource 'https://www.apache.org/licenses/LICENSE-2.0.txt'. at
> remote-resources[line 38, column 26] -> [Help 1]
> [ERROR]
> [ERROR] To see the full stack trace of the errors, re-run Maven with the -e
> switch.
> [ERROR] Re-run Maven using the -X switch to enable full debug logging.
> [ERROR]
> [ERROR] For more information about the errors and possible solutions, please
> read the following articles:
> [ERROR] [Help 1]
> http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
> [ERROR]
> [ERROR] After correcting the problems, you can resume the build with the
> command
> [ERROR] mvn <goals> -rf :apache-maven
> {code}
> And the stacktrace:
> {code}
> [ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process (default)
> on project apache-maven: Error rendering velocity resource. Invocation of
> method 'getResourceAsFile' in class
> org.codehaus.plexus.resource.DefaultResourceManager threw exception
> org.codehaus.plexus.resource.loader.ResourceNotFoundException: Could not find
> resource 'https://www.apache.org/licenses/LICENSE-2.0.txt'. at
> remote-resources[line 38, column 26] -> [Help 1]
> org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute
> goal org.apache.maven.plugins:maven-remote-resources-plugin:1.5:process
> (default) on project apache-maven: Error rendering velocity resource.
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:217)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
> at
> org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
> at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
> at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
> at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
> at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
> at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
> at java.lang.reflect.Method.invoke(Method.java:508)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:414)
> at
> org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:357)
> Caused by: org.apache.maven.plugin.MojoExecutionException: Error rendering
> velocity resource.
> at
> org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.processResourceBundles(ProcessRemoteResourcesMojo.java:1246)
> at
> org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.execute(ProcessRemoteResourcesMojo.java:520)
> at
> org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
> at
> org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
> ... 19 more
> Caused by: org.apache.velocity.exception.MethodInvocationException:
> Invocation of method 'getResourceAsFile' in class
> org.codehaus.plexus.resource.DefaultResourceManager threw exception
> org.codehaus.plexus.resource.loader.ResourceNotFoundException: Could not find
> resource 'https://www.apache.org/licenses/LICENSE-2.0.txt'. at
> remote-resources[line 38, column 26]
> at
> org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:243)
> at
> org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
> at
> org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
> at
> org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
> at
> org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
> at
> org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
> at
> org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
> at
> org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
> at
> org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
> at
> org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
> at
> org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
> at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:420)
> at
> org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
> at
> org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
> at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:420)
> at
> org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
> at
> org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
> at
> org.apache.velocity.runtime.RuntimeInstance.render(RuntimeInstance.java:1378)
> at
> org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1314)
> at org.apache.velocity.app.Velocity.evaluate(Velocity.java:254)
> at
> org.apache.maven.plugin.resources.remote.ProcessRemoteResourcesMojo.processResourceBundles(ProcessRemoteResourcesMojo.java:1218)
> ... 22 more
> Caused by: org.codehaus.plexus.resource.loader.ResourceNotFoundException:
> Could not find resource 'https://www.apache.org/licenses/LICENSE-2.0.txt'.
> at
> org.codehaus.plexus.resource.DefaultResourceManager.getResource(DefaultResourceManager.java:173)
> at
> org.codehaus.plexus.resource.DefaultResourceManager.getResourceAsFile(DefaultResourceManager.java:91)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
> at java.lang.reflect.Method.invoke(Method.java:508)
> at
> org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
> at
> org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
> at
> org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
> ... 41 more
> {code}
> The error seems to be caused by Apache Velocity invoking a method to retrieve
> the file via reflection. But I am not sure why this is, because I can't find
> any Velocity templates with this reflective method call inside.
> Incidentally, if I disable the plugin using "-Dremoteresources.skip=true",
> the build succeeds. So it's definitely something caused by the way this
> plugin is configured.
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