Maven 3.9.0 and Tycho 3.0.1 - Cannot invoke "org.apache.maven.repository.internal.ModelCacheFactory.createCache(org.eclipse.aether.RepositorySystemSession)" because "this.modelCacheFactory" is null

[Phillipus]

Maven 3.9.0
Tycho 3.0.1 (and 4.0.0-SNAPSHOT)
Java Temurin-17.0.6+10

Apologies in advance - I don't know if this is a Maven problem or a Tycho problem.

Simple test pom.xml and project attached:

test tycho.zip

mvn clean package leads to:

[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.eclipse.tycho.build.TychoGraphBuilder.build (TychoGraphBuilder.java:88)
    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)

[laeubi]

Tycho currently do not support maven 3.9 see

• Bump maven-version from 3.8.7 to 3.9.0 #2058

[Phillipus]

Tycho currently do not support maven 3.9

Got it, missed that one. I'll close this, sorry for noise. 😄

[laeubi]

See also:

• Investigate Maven 3.9.0 #2084

[laeubi]

@Phillipus this is caused by:

• Update to maven 3.9.0 takari/polyglot-maven#256

I have prepared a workaround for Tycho 4 here:

• Adjust code for Tycho to run on maven 3.9.0 and use it for GH Actions #2093

[Phillipus]

@laeubi Thanks for letting me know, appreciate it. :-)