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https://issues.apache.org/jira/browse/MNG-5965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16729017#comment-16729017
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Michael Osipov commented on MNG-5965:
-------------------------------------
[~janos.gyerik], cannot reproduce:
{noformat}
PS D:\Entwicklung\workspace-4.7\toll> mvn -V install:install-file
"-Dfile=pom.xml" -T10 -Dgrou
pId=one -DartifactId=one -Dversion=1 -Dpackaging=pom
Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe;
2018-06-17T20:33:14+02:00)
Maven home: D:\Entwicklung\Programme\apache-maven-3.5.4\bin\..
Java version: 1.8.0_181, vendor: Oracle Corporation, runtime: C:\Program
Files\Java\jdk1.8.0_181\jre
Default locale: de_DE, platform encoding: Cp1252
OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
[INFO] Scanning for projects...
[INFO]
[INFO] Using the MultiThreadedBuilder implementation with a thread count of 10
[INFO]
[INFO] -----------------------------< toll:toll >------------------------------
[INFO] Building toll 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-install-plugin:2.4:install-file (default-cli) @ toll ---
[INFO] Installing D:\Entwicklung\workspace-4.7\toll\pom.xml to
C:\Users\mosipov\.m2\repository\one\one\1\one-1.pom
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.342 s (Wall Clock)
[INFO] Finished at: 2018-12-26T13:18:54+01:00
[INFO] ------------------------------------------------------------------------
{noformat}
Looking into the IT...
> Parallel build multiplies work if multiple goals are given
> ----------------------------------------------------------
>
> Key: MNG-5965
> URL: https://issues.apache.org/jira/browse/MNG-5965
> Project: Maven
> Issue Type: Bug
> Components: Bootstrap & Build
> Affects Versions: 3.3.9
> Environment: Windows 7 64bit
> Reporter: Matthias Schmalz
> Assignee: Michael Osipov
> Priority: Major
> Attachments: parallel.test.zip
>
>
> When I run a parallel build which invokes multiple goals Maven multiplies the
> work e.g. when I run
> install sonar:sonar
> Every phase is executed once as expected. However when I run
> install sonar:sonar -T 4
> Every phase is executed twice.
> The problem can be reproduced with a single simple Java project (of course
> parallel builds are useless with a single module). Debugging showed that
> every Mojo is really called twice per project.
> Find attached a simple project and two build outputs, where you can see that
> the parallel build is doing everything twice (you can ignore that Sonar fails
> in the end, due to no server is up).
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