[ 
https://jira.codehaus.org/browse/MNG-5626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=345647#comment-345647
 ] 

Michael Osipov commented on MNG-5626:
-------------------------------------

Hervé,

here are the spots:

{noformat}
maven-aether-provider/src/test/java/org/apache/maven/repository/internal/util/ConsoleTransferListener.java:
            long duration = System.currentTimeMillis() - 
resource.getTransferStartTime();
maven-compat/src/main/java/org/apache/maven/artifact/repository/metadata/DefaultRepositoryMetadataManager.java:
                    file.setLastModified( System.currentTimeMillis() );
maven-compat/src/main/java/org/apache/maven/repository/legacy/DefaultUpdateCheckManager.java:
                props.setProperty( key, Long.toString( 
System.currentTimeMillis() ) );
maven-compat/src/main/java/org/apache/maven/repository/legacy/DefaultWagonManager.java:
                                destination.setLastModified( 
System.currentTimeMillis() );
maven-compat/src/main/java/org/apache/maven/repository/legacy/MavenArtifact.java:
        this.transferStartTime = System.currentTimeMillis();
maven-compat/src/test/java/org/apache/maven/artifact/testutils/TestFileManager.java:
        File dir = new File( TEMP_DIR_PATH, baseFilename + 
System.currentTimeMillis() );
maven-compat/src/test/java/org/apache/maven/repository/legacy/StringWagon.java: 
           resource.setLastModified( System.currentTimeMillis() );
maven-core/src/main/java/org/apache/maven/artifact/repository/metadata/AbstractRepositoryMetadata.java:
            metadataFile.setLastModified( System.currentTimeMillis() );
maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/BuilderCommon.java:
        long buildEndTime = System.currentTimeMillis();
maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleModuleBuilder.java:
        long buildStartTime = System.currentTimeMillis();
maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleModuleBuilder.java:
            long buildEndTime = System.currentTimeMillis();
maven-core/src/test/java/org/apache/maven/project/DefaultMavenProjectBuilderTest.java:
        localRepoDir = new File( System.getProperty( "java.io.tmpdir" ), 
"local-repo." + System.currentTimeMillis() );
maven-core/src/test/java/org/apache/maven/project/MavenProjectTest.java:        
    new File( System.getProperty( "java.io.tmpdir" ), "maven-project-tests" + 
System.currentTimeMillis()
maven-embedder/src/main/java/org/apache/maven/cli/event/ExecutionEventLogger.java:
        long finish = System.currentTimeMillis();
maven-embedder/src/main/java/org/apache/maven/cli/transfer/AbstractMavenTransferListener.java:
            long duration = System.currentTimeMillis() - 
resource.getTransferStartTime();
maven-embedder/src/main/java/org/apache/maven/cli/transfer/Slf4jMavenTransferListener.java:
            long duration = System.currentTimeMillis() - 
resource.getTransferStartTime();
{noformat}

Did I miss some?

> Avoid negative durations or handle them correctly
> -------------------------------------------------
>
>                 Key: MNG-5626
>                 URL: https://jira.codehaus.org/browse/MNG-5626
>             Project: Maven 2 & 3
>          Issue Type: Bug
>          Components: Logging
>    Affects Versions: 3.2.1
>            Reporter: Christian Jung
>            Priority: Minor
>
> In issue MNG-5623 we reported an exception when printing the reactor summary 
> if one of the times was negative.
> I saw in one case, that the overall maven build time, as measured from 
> outside (i.e. by our QuickBuild system) was -10.8 seconds. The corresponding 
> reactor summary was:
> {code}
> 13:55:25,184 INFO  - Reactor Summary:
> 13:55:25,184 INFO  -
> 13:55:25,184 INFO  - module1 ........................................... 
> SUCCESS [ 5.911 s]
> 13:55:25,184 INFO  - module2 ........................................... 
> SUCCESS [ 0.255 s]
> 13:55:25,184 INFO  - gpPlaygroundBase-lnx-x64-gcc4 ..................... 
> SUCCESS [-27.-64 s]
> 13:55:25,185 INFO  - 
> ------------------------------------------------------------------------
> 13:55:25,185 INFO  - BUILD SUCCESS
> 13:55:25,185 INFO  - 
> ------------------------------------------------------------------------
> 13:55:25,185 INFO  - Total time: -20.-73 s
> 13:55:25,185 INFO  - Finished at: 2014-04-28T13:55:25+01:00
> 13:55:25,572 INFO  - Final Memory: 32M/439M
> 13:55:25,572 INFO  - 
> ------------------------------------------------------------------------
> {code}
> The thing is quite hard to reproduce, the machines were virtual machines that 
> have been running for quite a long time.
> Our administrators suspected that just at this point, the local clock was 
> synchronized with some outer source.
> We should check if such negative durations can be avoided, and if not, they 
> should be handled correctly.



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