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https://issues.apache.org/jira/browse/MRESOLVER-25?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16028108#comment-16028108
]
Roland Illig commented on MRESOLVER-25:
---------------------------------------
Yes, the workaround works for me. Thank you.
The files were downloaded correctly and I got a {{BUILD SUCCESS}}, I just got
the following exception about 7 times, for several of the involved artifacts:
{noformat}
[WARNING] Failed to write tracking file
C:\Users\rillig\.m2\repository\org\webjars\bower\datatables.net-buttons\1.2.4\datatables.net-buttons-1.2.4.pom.lastUpdated
java.io.FileNotFoundException:
C:\Users\rillig\.m2\repository\org\webjars\bower\datatables.net-buttons\1.2.4\datatables.net-buttons-1.2.4.pom.lastUpdated
(Zugriff verweigert)
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:96)
at
org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.write(DefaultUpdateCheckManager.java:602)
at
org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.touchArtifact(DefaultUpdateCheckManager.java:538)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.evaluateDownloads(DefaultArtifactResolver.java:631)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads(DefaultArtifactResolver.java:550)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:436)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:262)
at
org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:239)
{noformat}
> Resume support is broken under high concurrency
> -----------------------------------------------
>
> Key: MRESOLVER-25
> URL: https://issues.apache.org/jira/browse/MRESOLVER-25
> Project: Maven Resolver
> Issue Type: Bug
> Components: resolver
> Affects Versions: Maven Artifact Resolver 1.0.3
> Reporter: Roland Illig
> Attachments: dependency-list.txt, dependency-list-x.zip,
> wagon-not-threadsafe.zip
>
>
> When building a multi-module project in parallel, Maven updates the local
> Maven repository without taking into account that other threads or processes
> might do the same at the same time.
> To reproduce:
> 1. unpack the attached project
> 2. {{mvn dependency:list -U -B -T100}}
> See the attached {{dependency-list.txt}} for an example output.
> First thing to notice is that the dependency is downloaded 100 times. This is
> unexpected, since the Reactor should coordinate all the modules.
> Second thing to notice is that the build fails, since a dependency "cannot be
> found". This is wrong, since the dependency _can_ be found, it's just not
> processed properly.
> I suspect the {{legacy.DefaultWagonManager}} to be the cause of this, since
> the typical error messages are:
> * {{"Downloaded file does not exist: "}}
> * {{"Error copying temporary file to the final destination: "}}
> * {{"*** CHECKSUM FAILED - RETRYING"}}
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