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https://issues.apache.org/jira/browse/MNG-8288?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tamas Cservenak reassigned MNG-8288:
------------------------------------
Assignee: Tamas Cservenak
> Path cannot be null while building reactor modules
> --------------------------------------------------
>
> Key: MNG-8288
> URL: https://issues.apache.org/jira/browse/MNG-8288
> Project: Maven
> Issue Type: Bug
> Components: Core
> Reporter: Tamas Cservenak
> Assignee: Tamas Cservenak
> Priority: Major
> Fix For: 4.0.0-beta-5
>
>
> Exception trace
> {noformat}
> org.apache.maven.InternalErrorException: Internal error:
> java.lang.IllegalArgumentException: path cannot be null
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:157)
> at org.apache.maven.cling.invoker.mvn.DefaultMavenInvoker.doExecute
> (DefaultMavenInvoker.java:449)
> at org.apache.maven.cli.DaemonMavenInvoker.doExecute
> (DaemonMavenInvoker.java:135)
> at org.apache.maven.cli.DaemonMavenInvoker.doExecute
> (DaemonMavenInvoker.java:39)
> at org.apache.maven.cling.invoker.mvn.DefaultMavenInvoker.execute
> (DefaultMavenInvoker.java:104)
> at org.apache.maven.cling.invoker.mvn.DefaultMavenInvoker.execute
> (DefaultMavenInvoker.java:72)
> at org.apache.maven.cling.invoker.LookupInvoker.doInvoke
> (LookupInvoker.java:202)
> at org.apache.maven.cling.invoker.LookupInvoker.invoke
> (LookupInvoker.java:177)
> at org.apache.maven.cli.DaemonMavenCling.main (DaemonMavenCling.java:76)
> at org.mvndaemon.mvnd.daemon.Server.handle (Server.java:616)
> at org.mvndaemon.mvnd.daemon.Server.client (Server.java:292)
> at org.mvndaemon.mvnd.daemon.Server.lambda$accept$2 (Server.java:254)
> at java.lang.Thread.run (Thread.java:1583)
> Caused by: java.lang.IllegalArgumentException: path cannot be null
> at org.apache.maven.api.services.BaseRequest.nonNull (BaseRequest.java:50)
> at org.apache.maven.api.services.ModelSource.fromPath
> (ModelSource.java:57)
> at org.apache.maven.api.services.ModelSource.fromPath
> (ModelSource.java:52)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder$DefaultModelBuilderSession.doReadFileModel
> (DefaultModelBuilder.java:1331)
> at
> org.apache.maven.internal.impl.model.DefaultModelCache$CachingSupplier.get
> (DefaultModelCache.java:178)
> at org.apache.maven.internal.impl.model.DefaultModelCache.computeIfAbsent
> (DefaultModelCache.java:65)
> at org.apache.maven.internal.impl.model.DefaultModelCache.computeIfAbsent
> (DefaultModelCache.java:56)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder$DefaultModelBuilderSession.cache
> (DefaultModelBuilder.java:1654)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder$DefaultModelBuilderSession.readFileModel
> (DefaultModelBuilder.java:1170)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder$DefaultModelBuilderSession.loadFilePom
> (DefaultModelBuilder.java:727)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder$DefaultModelBuilderSession.loadFromRoot
> (DefaultModelBuilder.java:705)
> at
> org.apache.maven.internal.impl.model.DefaultModelBuilder$DefaultModelBuilderSession.buildBuildPom
> (DefaultModelBuilder.java:652)
> at org.apache.maven.internal.impl.model.DefaultModelBuilder$1.build
> (DefaultModelBuilder.java:227)
> at org.apache.maven.project.DefaultProjectBuilder$BuildSession.build
> (DefaultProjectBuilder.java:491)
> at
> org.apache.maven.project.DefaultProjectBuilder$BuildSession.lambda$doBuild$5
> (DefaultProjectBuilder.java:468)
> at java.util.stream.ReferencePipeline$3$1.accept
> (ReferencePipeline.java:197)
> at java.util.Collections$2.tryAdvance (Collections.java:5073)
> at java.util.Collections$2.forEachRemaining (Collections.java:5081)
> at java.util.stream.AbstractPipeline.copyInto (AbstractPipeline.java:509)
> at java.util.stream.AbstractPipeline.wrapAndCopyInto
> (AbstractPipeline.java:499)
> at java.util.stream.ReduceOps$ReduceOp.evaluateSequential
> (ReduceOps.java:921)
> at java.util.stream.AbstractPipeline.evaluate (AbstractPipeline.java:234)
> at java.util.stream.ReferencePipeline.collect (ReferencePipeline.java:682)
> at org.apache.maven.project.DefaultProjectBuilder$BuildSession.doBuild
> (DefaultProjectBuilder.java:470)
> at org.apache.maven.project.DefaultProjectBuilder$BuildSession.build
> (DefaultProjectBuilder.java:444)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:183)
> at
> org.apache.maven.project.collector.DefaultProjectsSelector.selectProjects
> (DefaultProjectsSelector.java:61)
> at
> org.apache.maven.project.collector.RequestPomCollectionStrategy.collectProjects
> (RequestPomCollectionStrategy.java:49)
> at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor
> (DefaultGraphBuilder.java:364)
> at org.apache.maven.graph.DefaultGraphBuilder.build
> (DefaultGraphBuilder.java:100)
> at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:629)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:250)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:225)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:149)
> at org.apache.maven.cling.invoker.mvn.DefaultMavenInvoker.doExecute
> (DefaultMavenInvoker.java:449)
> at org.apache.maven.cli.DaemonMavenInvoker.doExecute
> (DaemonMavenInvoker.java:135)
> at org.apache.maven.cli.DaemonMavenInvoker.doExecute
> (DaemonMavenInvoker.java:39)
> at org.apache.maven.cling.invoker.mvn.DefaultMavenInvoker.execute
> (DefaultMavenInvoker.java:104)
> at org.apache.maven.cling.invoker.mvn.DefaultMavenInvoker.execute
> (DefaultMavenInvoker.java:72)
> at org.apache.maven.cling.invoker.LookupInvoker.doInvoke
> (LookupInvoker.java:202)
> at org.apache.maven.cling.invoker.LookupInvoker.invoke
> (LookupInvoker.java:177)
> at org.apache.maven.cli.DaemonMavenCling.main (DaemonMavenCling.java:76)
> at org.mvndaemon.mvnd.daemon.Server.handle (Server.java:616)
> at org.mvndaemon.mvnd.daemon.Server.client (Server.java:292)
> at org.mvndaemon.mvnd.daemon.Server.lambda$accept$2 (Server.java:254)
> at java.lang.Thread.run (Thread.java:1583)
> {noformat}
> Reason: is usually project formatted like this:
> {noformat}
> worx
> .mvn
> prj1
> pom.xml
> prj2
> pom.xml
> {noformat}
> At level of {{.mvn}} there is no POM.
> IMHO this is valid layout. Maven should not expect that there is pom.xml
> where .mvn directory is. Is like is mixing rootDirectory and topDirectory?
> Also, as we discussed, Maven _could come up_ with generated on the fly POMs
> for such directories, to be able to build the complete tree structure: these
> POMs are not parents (otherwise they would be referenced from prj1 or prj2
> and they missing would mean project is broken). They are really "just
> aggregator" POMs, but subprojects can today be inferred, it means they need
> GA only, V=1 and packaging=pom.
> This means maven could generate these in memory with random G and
> V=relativized path from rootDirectory parent?
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