[jira] [Updated] (MNG-7511) Ensure the degreeOfConcurrency is a positive number in MavenExecutionRequest

["Guillaume Nodet (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MNG-7511?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guillaume Nodet updated MNG-7511:
---------------------------------
    Fix Version/s: 4.0.0-alpha-2

> Ensure the degreeOfConcurrency is a positive number in MavenExecutionRequest
> ----------------------------------------------------------------------------
>
>                 Key: MNG-7511
>                 URL: https://issues.apache.org/jira/browse/MNG-7511
>             Project: Maven
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 3.8.6
>            Reporter: Josef Cacek
>            Assignee: Michael Osipov
>            Priority: Major
>             Fix For: 3.9.0, 4.0.0-alpha-1, 4.0.0-alpha-2, 4.0.0
>
>
> The {{degreeOfConcurrency}} should always be a positive number, otherwise builds might fail.
> In Hazelcast we build with threads set to {{-T 0.5C}} in [{{.mvn/maven.config}}|https://github.com/hazelcast/hazelcast/blob/v5.1.2/.mvn/maven.config].
> This is fine until we run the build on a single CPU machine. It fails then with {{IllegalArgumentException}} as the computed {{degreeOfConcurrency == 0}}.
> Stacktrace from Maven 3.6.3:
> {code}
> [ERROR] IllegalArgumentException
> java.lang.IllegalArgumentException
>     at java.util.concurrent.ThreadPoolExecutor.<init> (ThreadPoolExecutor.java:1293)
>     at java.util.concurrent.ThreadPoolExecutor.<init> (ThreadPoolExecutor.java:1215)
>     at java.util.concurrent.Executors.newFixedThreadPool (Executors.java:155)
>     at org.apache.maven.lifecycle.internal.builder.multithreaded.MultiThreadedBuilder.build (MultiThreadedBuilder.java:88)
>     at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
>     at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
>     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)
> {code}



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