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https://issues.apache.org/jira/browse/MNG-7546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17609013#comment-17609013
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Karl Heinz Marbaise commented on MNG-7546:
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Can you please create an example project on github or alike...
> A NullPointerException on recursive propety definition
> ------------------------------------------------------
>
> Key: MNG-7546
> URL: https://issues.apache.org/jira/browse/MNG-7546
> Project: Maven
> Issue Type: Bug
> Components: Bootstrap & Build
> Affects Versions: 3.8.6
> Reporter: Ondrej
> Priority: Trivial
>
> A NPE occured when I have changed some versions to a ${...} expression using
> find & replace.
> That also replaced the property definition:
> <{color:#002586}version.testcontainers{color}>${version.testcontainers}</{color:#002586}version.testcontainers{color}>
> ...
> <{color:#002586}dependency{color}><{color:#002586}groupId{color}>org.testcontainers</{color:#002586}groupId{color}><{color:#002586}artifactId{color}>testcontainers</{color:#002586}artifactId{color}><{color:#002586}type{color}>pom</{color:#002586}type{color}><{color:#002586}version{color}>${version.testcontainers}</{color:#002586}version{color}><{color:#002586}scope{color}>test</{color:#002586}scope{color}></{color:#002586}dependency{color}>
> This resulted in the following NPE:
> {code:java}
> /usr/lib/jvm/java-1.18.0-openjdk-amd64/bin/java
> -Dmaven.multiModuleProjectDirectory=/home/o/work/tracker-service/tracker-service
> -Dmaven.home=/snap/intellij-idea-community/387/plugins/maven/lib/maven3
> -Dclassworlds.conf=/snap/intellij-idea-community/387/plugins/maven/lib/maven3/bin/m2.conf
>
> -Dmaven.ext.class.path=/snap/intellij-idea-community/387/plugins/maven/lib/maven-event-listener.jar
>
> -javaagent:/snap/intellij-idea-community/387/lib/idea_rt.jar=46145:/snap/intellij-idea-community/387/bin
> -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8
> -Dsun.stderr.encoding=UTF-8 -classpath
> /snap/intellij-idea-community/387/plugins/maven/lib/maven3/boot/plexus-classworlds-2.6.0.jar:/snap/intellij-idea-community/387/plugins/maven/lib/maven3/boot/plexus-classworlds.license
> org.codehaus.classworlds.Launcher -Didea.version=2022.2.2 compile
> [INFO] Scanning for projects...
> [ERROR] Internal error: java.lang.NullPointerException -> [Help 1]
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.NullPointerException
> 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.DirectMethodHandleAccessor.invoke
> (DirectMethodHandleAccessor.java:104)
> at java.lang.reflect.Method.invoke (Method.java:577)
> 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 org.codehaus.classworlds.Launcher.main (Launcher.java:47)
> Caused by: java.lang.NullPointerException
> at java.util.concurrent.ConcurrentHashMap$MapEntry.setValue
> (ConcurrentHashMap.java:3546)
> at
> org.apache.maven.model.interpolation.StringVisitorModelInterpolator$ModelVisitor.visit
> (StringVisitorModelInterpolator.java:1429)
> at
> org.apache.maven.model.interpolation.StringVisitorModelInterpolator$ModelVisitor.visit
> (StringVisitorModelInterpolator.java:1027)
> at
> org.apache.maven.model.interpolation.StringVisitorModelInterpolator$ModelVisitor.visit
> (StringVisitorModelInterpolator.java:170)
> at
> org.apache.maven.model.interpolation.StringVisitorModelInterpolator.interpolateModel
> (StringVisitorModelInterpolator.java:107)
> at org.apache.maven.model.building.DefaultModelBuilder.interpolateModel
> (DefaultModelBuilder.java:789)
> at org.apache.maven.model.building.DefaultModelBuilder.build
> (DefaultModelBuilder.java:393)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:448)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:414)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:377)
> at org.apache.maven.graph.DefaultGraphBuilder.collectProjects
> (DefaultGraphBuilder.java:414)
> at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor
> (DefaultGraphBuilder.java:405)
> at org.apache.maven.graph.DefaultGraphBuilder.build
> (DefaultGraphBuilder.java:82)
> at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:507)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:219)
> 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.DirectMethodHandleAccessor.invoke
> (DirectMethodHandleAccessor.java:104)
> at java.lang.reflect.Method.invoke (Method.java:577)
> 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 org.codehaus.classworlds.Launcher.main (Launcher.java:47)
> [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/InternalErrorExceptionProcess
> finished with exit code 1
> {code}
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