Class cast exception with Tycho on jQA 1.8.0

[Gerd Aschemann]

I do get the following class cast exception when running mvnw jqassistant:server:

[INFO]

[ERROR] Internal error: java.lang.ClassCastException: class org.eclipse.tycho.core.osgitools.DefaultReactorProject cannot be cast to class org.eclipse.tycho.ReactorProject (org.eclipse.tycho.core.osgitools.DefaultReactorProject is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @283a8ad6; org.eclipse.tycho.ReactorProject is i

n unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @5812935) -> [Help 1]

org.apache.maven.InternalErrorException: Internal error: java.lang.ClassCastException: class org.eclipse.tycho.core.osgitools.DefaultReactorProject cannot be cast to class org.eclipse.tycho.ReactorProject (org.eclipse.tycho.core.osgitools.DefaultReactorProject is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @283a8ad6; org.

eclipse.tycho.ReactorProject is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @5812935)

    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:120)

    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)

    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)

    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)

    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke (Method.java:566)

    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)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)

    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke (Method.java:566)

    at org.apache.maven.wrapper.BootstrapMainStarter.start (BootstrapMainStarter.java:39)

    at org.apache.maven.wrapper.WrapperExecutor.execute (WrapperExecutor.java:122)

    at org.apache.maven.wrapper.MavenWrapperMain.main (MavenWrapperMain.java:60)

Caused by: java.lang.ClassCastException: class org.eclipse.tycho.core.osgitools.DefaultReactorProject cannot be cast to class org.eclipse.tycho.ReactorProject (org.eclipse.tycho.core.osgitools.DefaultReactorProject is in unnamed module of loader org.codehaus.plexus.classworlds.realm.ClassRealm @283a8ad6; org.eclipse.tycho.ReactorProject is in unnamed mod

ule of loader org.codehaus.plexus.classworlds.realm.ClassRealm @5812935)

    at org.eclipse.tycho.core.osgitools.DefaultReactorProject.adapt (DefaultReactorProject.java:44)

    at org.eclipse.tycho.core.maven.TychoMavenLifecycleParticipant.afterProjectsRead (TychoMavenLifecycleParticipant.java:90)

    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:264)

    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)

    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)

    at org.apache.maven.cli.MavenCli.execute (MavenCli.java:957)

    at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:289)

    at org.apache.maven.cli.MavenCli.main (MavenCli.java:193)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)

    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke (Method.java:566)

    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)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)

    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)

    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)

    at java.lang.reflect.Method.invoke (Method.java:566)

    at org.apache.maven.wrapper.BootstrapMainStarter.start (BootstrapMainStarter.java:39)

    at org.apache.maven.wrapper.WrapperExecutor.execute (WrapperExecutor.java:122)

    at org.apache.maven.wrapper.MavenWrapperMain.main (MavenWrapperMain.java:60)

I'm using Maven (Wrapper) 3.6.3 and OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.6+10).

Is there any way to exclude jQA OSGi plugin?

Any help appreciated, thanks!

[Dirk Mahler]

Hi Gerd,

sadly I'm not aware of a way to exclude dependencies from a Maven plugin.

Question: Do you have set <extensions>true</extensions> for the jQA plugin in your pom.xml?

Cheers

Dirk

------ Originalnachricht ------

Von: "'Gerd Aschemann' via jQAssistant" <jqass...@googlegroups.com>

An: "jQAssistant" <jqass...@googlegroups.com>

Gesendet: 13.10.2020 09:14:26

Betreff: [jQAssistant] Class cast exception with Tycho on jQA 1.8.0

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[Gerd Aschemann]

Hi Dirk,

thanks for the reply. Yes, I do have extensions switched on but cannot remember why I did so. I just set everything as it is now some time ago (probably took it over from some other project). What is the purpose of extensions? Can't find much about it in the documentation.

Thx

---

Gerd Aschemann --- Veröffentlichen heißt Verändern (Carmen Thomas)
+49/173/3264070 -- ge...@aschemann.net -- http://www.aschemann.net

To view this discussion on the web visit https://groups.google.com/d/msgid/jqassistant/em9622b14c-01c0-42d1-9729-de50e7e1f8c1%40mythenmetz-jr.

[Dirk Mahler]

Hi Gerd,

sometimes there are classloading problems in multi-module projects with
the embedded Neo4j database. In such cases a possible solution is to
declare the jQA plugin using <extensions>true</extensions>.

So if you don't have that problem you should not activate it.

Cheers

Dirk

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[Gerd Aschemann]

Hi Dirk,

could you probably spent some words on the <extension> flag in the jQA
documentation?

I fell back to Java 8 and everything is fine now:

Apache Maven 3.6.3 (cecedd343002696d0abb50b32b541b8a6ba2883f)
Maven home:
C:\Users\GerdAschemann\.m2\wrapper\dists\apache-maven-3.6.3-bin\5f4q40pm8i94qrm7th7hui7q03\apache-maven-3.6.3
Java version: 1.8.0_191-1-redhat, vendor: Oracle Corporation, runtime:
R:\software\jdk1.8.0.191\jre
Default locale: en_US, platform encoding: UTF-8
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"

Do you test jQA with (Open) JDK 11?

Thanks

---
Gerd Aschemann --- Veröffentlichen heißt Verändern (Carmen Thomas)
+49/173/3264070 -- ge...@aschemann.net -- http://www.aschemann.net

[Gerd Aschemann]

Hi Dirk,

I have opened an issue since the problem is reproducible with my open source project (you know, DukeCon ;-): https://github.com/jQAssistant/jqa-maven3-plugin/issues/12

Would be great if you could have a look into it.

Regards

--

Gerd Aschemann --- Veröffentlichen heißt Verändern (Carmen Thomas)
+49/173/3264070 -- ge...@aschemann.net -- http://www.aschemann.net

[Dirk Mahler]

Hi Gerd,

will have a look into it - thanks for raising the issue!

Cheers

Dirk

------ Originalnachricht ------

Von: "Gerd Aschemann" <ge...@aschemann.net>

An: "Aschemann Gerd" <ge...@aschemann.net>

Cc: jqass...@googlegroups.com

Gesendet: 18.10.2020 17:31:45

Betreff: Re: [jQAssistant] Class cast exception with Tycho on jQA 1.8.0

To view this discussion on the web visit https://groups.google.com/d/msgid/jqassistant/7B0AA928-168F-4E1B-819D-9016823D6674%40aschemann.net.

[Gerd Aschemann]

Thanks, it is not super urgent, since we have a workaround with JDK 8 now.

--

Gerd Aschemann --- Veröffentlichen heißt Verändern (Carmen Thomas)
+49/173/3264070 -- ge...@aschemann.net -- http://www.aschemann.net

To view this discussion on the web visit https://groups.google.com/d/msgid/jqassistant/em7b5ef6ec-617d-4f48-8073-721182cf8e57%40mythenmetz-jr.