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https://issues.apache.org/jira/browse/MNG-2802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16584418#comment-16584418
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ASF GitHub Bot commented on MNG-2802:
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erikhakansson opened a new pull request #49: [MNG-2802] Concurrent-safe access
to local Maven repository
URL: https://github.com/apache/maven-wagon/pull/49
Made file wagon optionally lock files using an adapted version of
LockableFileWriter from commons-io.
Integration test is made by forking two separate java processes that
attempts to lock the same file. Only the first will succeed.
At first I tried using Java's FileLock, but that proved impossible on
Windows Subsystem for Linux as that doesn't reliably support file locks, and
after some googling I realized the native FileLocks are generally unreliable
from Java. Instead I opted to use lockfiles using the commons-io approach.
Use system property maven.wagon.file.fileLock=true to enable file lock.
Default is off, default timeout is 300 seconds, but configurable with
maven.wagon.file.fileLock.timeout
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> Concurrent-safe access to local Maven repository
> ------------------------------------------------
>
> Key: MNG-2802
> URL: https://issues.apache.org/jira/browse/MNG-2802
> Project: Maven
> Issue Type: Improvement
> Components: Artifacts and Repositories
> Reporter: Stepan Roh
> Assignee: John Casey
> Priority: Major
> Fix For: Issues to be reviewed for 3.x
>
>
> It seems that access to local Maven repository is not concurrent-safe that is
> multiple Mavens running in parallel may damage contents of local Maven
> repository. It would be a nice improvement, because sharing of local
> repository will lower the need for contacting any other repository. I know
> that Maven proxy can be used, but that adds another layer which may
> unnecessarily stress the machine it runs on.
> *NOTE:*
> http://takari.io/book/30-team-maven.html#concurrent-safe-local-repository is
> a Takari Extension for Apache Maven that introduces a concurrent-safe
> local-repository.
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