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https://jira.codehaus.org/browse/MNG-4706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason van Zyl updated MNG-4706:
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Fix Version/s: (was: Issues to be reviewed for 3.x)
Issues to be reviewed for 4.x
> Multithreaded building can create bad files for downloaded artifacts in local
> repository
> ----------------------------------------------------------------------------------------
>
> Key: MNG-4706
> URL: https://jira.codehaus.org/browse/MNG-4706
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Artifacts and Repositories
> Affects Versions: 3.0-beta-1
> Reporter: Kristian Rosenvold
> Assignee: Kristian Rosenvold
> Fix For: Issues to be reviewed for 4.x
>
>
> 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.
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