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https://issues.apache.org/jira/browse/MNG-7693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tamas Cservenak closed MNG-7693.
--------------------------------
Resolution: Fixed
> NPE in createModelCache, modelCacheFactory is null
> --------------------------------------------------
>
> Key: MNG-7693
> URL: https://issues.apache.org/jira/browse/MNG-7693
> Project: Maven
> Issue Type: Bug
> Affects Versions: 3.9.0
> Reporter: Charles Oliver Nutter
> Assignee: Tamas Cservenak
> Priority: Major
> Fix For: 3.9.1
>
>
> This appears to be a new regression, possibly an incompatibility with
> polyglot-maven.
> Maven 3.9.0 now produces the following error when building JRuby
> ([https://github.com/jruby/jruby.git):]
> {noformat}
> [] jruby $ mvn -Pbootstrap clean package
> [INFO] Scanning for projects...
> [ERROR] Internal error: java.lang.NullPointerException: Cannot invoke
> "org.apache.maven.repository.internal.ModelCacheFactory.createCache(org.eclipse.aether.RepositorySystemSession)"
> because "this.modelCacheFactory" is null -> [Help 1]
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.NullPointerException: Cannot invoke
> "org.apache.maven.repository.internal.ModelCacheFactory.createCache(org.eclipse.aether.RepositorySystemSession)"
> because "this.modelCacheFactory" is null
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:108)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:821)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:270)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:77)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:568)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:282)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:225)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:406)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main
> (Launcher.java:347)
> Caused by: java.lang.NullPointerException: Cannot invoke
> "org.apache.maven.repository.internal.ModelCacheFactory.createCache(org.eclipse.aether.RepositorySystemSession)"
> because "this.modelCacheFactory" is null
> at org.apache.maven.project.DefaultProjectBuilder.createModelCache
> (DefaultProjectBuilder.java:1002)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:362)
> at org.sonatype.maven.polyglot.TeslaProjectBuilder.build
> (TeslaProjectBuilder.java:43)
> at org.apache.maven.graph.DefaultGraphBuilder.collectProjects
> (DefaultGraphBuilder.java:349)
> at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor
> (DefaultGraphBuilder.java:340)
> at org.apache.maven.graph.DefaultGraphBuilder.build
> (DefaultGraphBuilder.java:76)
> at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:453)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:196)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:172)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:100)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:821)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:270)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at jdk.internal.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:77)
> at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:568)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:282)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:225)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:406)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main
> (Launcher.java:347)
> [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/InternalErrorException{noformat}
> No additional information is given running with -X but I can provide that
> output if necessary.
> This blocks JRuby CI due to the Windows Github Actions having updated to
> Maven 3.9.0 recently. Other platforms may soon also fail if updated.
> Reproduce by using Maven 3.9.0 to build JRuby, which built correctly on
> previous Maven versions.
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