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https://issues.apache.org/jira/browse/MNG-7545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17614383#comment-17614383
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liuchangcheng commented on MNG-7545:
------------------------------------
what is the constraints？but we still have this issue
> Multi building can create bad files for downloaded artifacts in local
> repository
> --------------------------------------------------------------------------------
>
> Key: MNG-7545
> URL: https://issues.apache.org/jira/browse/MNG-7545
> Project: Maven
> Issue Type: Bug
> Components: Artifacts and Repositories
> Affects Versions: 3.8.6
> Reporter: liuchangcheng
> Assignee: Michael Osipov
> Priority: Major
>
> Within a parallel build, modules A and B can start at the same time and
> decide at the same time that they need to download artifact X. Since X is not
> available locally, both can start download of X. Both will download X and
> both will try to write the file for X to disk.
> On Windows platforms, one of them can fail with file locking problems. On
> Unixes the contents of the written file can be non-deterministic.
> This issue is related to MNG-2802 in the sense that it can create a corrupted
> artifact file in the local repository, and it can happen to ANY file written.
> But as opposed to MNG-2802 the synhronization needed to fix this issue is
> basically only within a single running maven process, so regular java
> mechanisms can apply, whereas MNG-2802 probably needs to use a totally
> different solution space.
>
> is this issue fixed?
> we are still facing this problem with maven 3.8.6
>
> I get error like this below
> [WARNING] Failed to write tracking file
> D:\opt\repository11\org\apache\ant\ant-launcher\1.10.12\ant-launcher-1.10.12.jar.lastUpdated
> java.io.FileNotFoundException:
> D:\opt\repository11\org\apache\ant\ant-launcher\1.10.12\ant-launcher-1.10.12.jar.lastUpdated
> (另一个程序正在使用此文件，进程无法访问。)
> at java.io.RandomAccessFile.open0 (Native Method)
> at java.io.RandomAccessFile.open (RandomAccessFile.java:316)
> at java.io.RandomAccessFile.<init> (RandomAccessFile.java:243)
> at org.eclipse.aether.internal.impl.TrackingFileManager.update
> (TrackingFileManager.java:86)
> at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.write
> (DefaultUpdateCheckManager.java:590)
> at
> org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.touchArtifact
> (DefaultUpdateCheckManager.java:526)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.evaluateDownloads
> (DefaultArtifactResolver.java:634)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads
> (DefaultArtifactResolver.java:525)
> at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve
> (DefaultArtifactResolver.java:402)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts
> (DefaultArtifactResolver.java:229)
> at
> org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveDependencies
> (DefaultRepositorySystem.java:340)
> at
> org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolveInternal
> (DefaultPluginDependenciesResolver.java:226)
> at
> org.apache.maven.plugin.internal.DefaultPluginDependenciesResolver.resolve
> (DefaultPluginDependenciesResolver.java:165)
> at
> org.apache.maven.plugin.internal.DefaultMavenPluginManager.resolveExtensionArtifacts
> (DefaultMavenPluginManager.java:911)
> at
> org.apache.maven.plugin.internal.DefaultMavenPluginManager.setupExtensionsRealm
> (DefaultMavenPluginManager.java:842)
> at
> org.apache.maven.project.DefaultProjectBuildingHelper.createProjectRealm
> (DefaultProjectBuildingHelper.java:197)
> at
> org.apache.maven.project.DefaultModelBuildingListener.buildExtensionsAssembled
> (DefaultModelBuildingListener.java:101)
> at org.apache.maven.model.building.ModelBuildingEventCatapult$1.fire
> (ModelBuildingEventCatapult.java:44)
> at org.apache.maven.model.building.DefaultModelBuilder.fireEvent
> (DefaultModelBuilder.java:1450)
> at org.apache.maven.model.building.DefaultModelBuilder.build
> (DefaultModelBuilder.java:530)
> at org.apache.maven.model.building.DefaultModelBuilder.build
> (DefaultModelBuilder.java:510)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:618)
> at org.apache.maven.project.DefaultProjectBuilder.build
> (DefaultProjectBuilder.java:387)
> at org.apache.maven.graph.DefaultGraphBuilder.collectProjects
> (DefaultGraphBuilder.java:414)
> at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor
> (DefaultGraphBuilder.java:405)
> at org.apache.maven.graph.DefaultGraphBuilder.build
> (DefaultGraphBuilder.java:82)
> at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:532)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:219)
> 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:960)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:293)
>
> [ERROR] Caused by:
> D:\opt\repository11\org\apache\httpcomponents\httpcore\4.3.3\httpcore-4.3.3.jar.part.lock
> (拒绝访问。)
>
> mvn -version
> Apache Maven 3.8.6 (84538c9988a25aec085021c365c560670ad80f63)
> Maven home: D:\apache-maven-3.8.6
> Java version: 1.8.0_141, vendor: Oracle Corporation, runtime: D:\Program
> Files\Java\jdk1.8.0_141\jre
> Default locale: zh_CN, platform encoding: GBK
> OS name: "windows 10", version: "10.0", arch: "amd64", family: "windows"
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