[ 
https://issues.apache.org/jira/browse/MNG-7634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17649489#comment-17649489
 ] 

Michael Osipov commented on MNG-7634:
-------------------------------------

Side note, I consider that most of these are incorrectly used:
{noformat}
^[[Aosipovmi@deblndw011x:~/var/Projekte/mit (master *=)
$ grep -r  setSystemProperty core-it-suite/src/test/java/
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4428FollowHttpRedirectTest.java:
            verifier.setSystemProperty( "javax.net.ssl.trustStore", storePath );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4428FollowHttpRedirectTest.java:
            verifier.setSystemProperty( "javax.net.ssl.trustStorePassword", 
storePwd );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng0848SystemPropOverridesDefaultValueTest.java:
        verifier.setSystemProperty( "config.aliasDefaultExpressionParam", 
"PASSED" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng0786ProfileAwareReactorTest.java:
        verifier.setSystemProperty( "expression.outputFile", 
"target/expression.properties" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng0786ProfileAwareReactorTest.java:
        verifier.setSystemProperty( "activate", "anything" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng2136ActiveByDefaultProfileTest.java:
        verifier.setSystemProperty( "expression.outputFile", new File( testDir, 
"target/expression.properties" ).getPath() );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng2136ActiveByDefaultProfileTest.java:
        verifier.setSystemProperty( "expression.expressions", 
"project/properties" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng2305MultipleProxiesTest.java:
            verifier.setSystemProperty( "javax.net.ssl.trustStore", storePath );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng2305MultipleProxiesTest.java:
            verifier.setSystemProperty( "javax.net.ssl.trustStorePassword", 
storePwd );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng2305MultipleProxiesTest.java:
            verifier.setSystemProperty( "maven.artifact.threads", "1" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng2577SettingsXmlInterpolationTest.java:
        verifier.setSystemProperty( "usr.MNGIT", "usr-prop-test" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4936EventSpyTest.java:
        verifier.setSystemProperty( "maven.ext.class.path", "spy-0.1.jar" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng3004ReactorFailureBehaviorMultithreadedTest.java:
        verifier.setSystemProperty( "maven.threads.experimental", "1" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng3004ReactorFailureBehaviorMultithreadedTest.java:
        verifier.setSystemProperty( "maven.threads.experimental", "1" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng3004ReactorFailureBehaviorMultithreadedTest.java:
        verifier.setSystemProperty( "maven.threads.experimental", "1" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng3004ReactorFailureBehaviorMultithreadedTest.java:
        verifier.setSystemProperty( "maven.threads.experimental", "2" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng3004ReactorFailureBehaviorMultithreadedTest.java:
        verifier.setSystemProperty( "maven.threads.experimental", "2" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng3379ParallelArtifactDownloadsTest.java:
        verifier.setSystemProperty( "maven.artifact.threads", "16" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng0377PluginLookupFromPrefixTest.java:
        verifier.setSystemProperty( "touch.outputFile", "target/file.txt" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4452ResolutionOfSnapshotWithClassifierTest.java:
        verifier.setSystemProperty( "mng4452.type", "jar" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4452ResolutionOfSnapshotWithClassifierTest.java:
        verifier.setSystemProperty( "mng4452.classifier", "unix" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4452ResolutionOfSnapshotWithClassifierTest.java:
        verifier.setSystemProperty( "mng4452.type", "jar" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4452ResolutionOfSnapshotWithClassifierTest.java:
        verifier.setSystemProperty( "mng4452.classifier", "win" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4452ResolutionOfSnapshotWithClassifierTest.java:
        verifier.setSystemProperty( "mng4452.type", "war" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4452ResolutionOfSnapshotWithClassifierTest.java:
        verifier.setSystemProperty( "mng4452.classifier", "win" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4469AuthenticatedDeploymentToCustomRepoTest.java:
        verifier.setSystemProperty( "file", "settings.xml" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4469AuthenticatedDeploymentToCustomRepoTest.java:
        verifier.setSystemProperty( "groupId", "org.apache.maven.its.mng4469" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4469AuthenticatedDeploymentToCustomRepoTest.java:
        verifier.setSystemProperty( "artifactId", "it" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4469AuthenticatedDeploymentToCustomRepoTest.java:
        verifier.setSystemProperty( "version", "0.1" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4469AuthenticatedDeploymentToCustomRepoTest.java:
        verifier.setSystemProperty( "repositoryId", "mng4469" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4469AuthenticatedDeploymentToCustomRepoTest.java:
        verifier.setSystemProperty( "repositoryUrl", "http://localhost:"; + port 
+ "/repo" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4590ImportedPomUsesSystemPropertiesTest.java:
        verifier.setSystemProperty( "test.dir", testDir.getAbsolutePath() );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4615ValidateRequiredPluginParameterTest.java:
        verifier.setSystemProperty( "config.requiredParam", "CLI" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4625SettingsXmlInterpolationWithXmlMarkupTest.java:
            verifier.setSystemProperty( "test.prop", "\"&x=y<>\"" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4625SettingsXmlInterpolationWithXmlMarkupTest.java:
            verifier.setSystemProperty( "test.prop", "&x=y<>" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4765LocalPomProjectBuilderTest.java:
        verifier.setSystemProperty( "user.prop", "OK" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng5011ConfigureCollectionArrayFromSystemPropTest.java:
        verifier.setSystemProperty( "config.stringParams", "" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng5011ConfigureCollectionArrayFromSystemPropTest.java:
        verifier.setSystemProperty( "config.fileParams", "foo,bar" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng5011ConfigureCollectionArrayFromSystemPropTest.java:
        verifier.setSystemProperty( "config.listParam", ",two,,four," );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng5208EventSpyParallelTest.java:
        verifier.setSystemProperty( "maven.ext.class.path", 
"../spy/target/event-spy-0.0.1-SNAPSHOT.jar" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng0294MergeGlobalAndUserSettingsTest.java:
            verifier.setSystemProperty( "org.apache.maven.global-settings", 
"global-settings.xml" );
core-it-suite/src/test/java/org/apache/maven/it/MavenITmng6558ToolchainsBuildingEventTest.java:
        verifier.setSystemProperty( "maven.ext.class.path", "spy-0.1.jar" );
{noformat}

> Revert MNG-5982 and MNG-7417
> ----------------------------
>
>                 Key: MNG-7634
>                 URL: https://issues.apache.org/jira/browse/MNG-7634
>             Project: Maven
>          Issue Type: Task
>            Reporter: Michael Osipov
>            Assignee: Michael Osipov
>            Priority: Major
>             Fix For: 3.9.0, 4.0.0, 4.0.0-alpha-4, 3.8.7
>
>
> As layed out in MNG-7563, both issues though solve one problem, but cause a 
> regression where direct user input manipulates dependency POMs in a way which 
> is not clear/documented as such. As long as we cannot properly understand and 
> document it, we must revert those changes.



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