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From Maarten Coene <>
Subject Re: Multiple artifacts error for modules that don't have multiple artifacts
Date Thu, 03 Dec 2009 22:08:35 GMT

could you open a JIRA issue for this and attach (if possible) a simple example so we can easily
reproduce the problem (I've made a few attempts, but I failed to reproduce the problem)


----- Original Message ----
From: Carlton Brown <>
Sent: Thu, December 3, 2009 8:21:59 PM
Subject: RE: Multiple artifacts error for modules that don't have multiple artifacts

> -----Original Message-----
> From: Carlton Brown []
> Sent: Thursday, December 03, 2009 6:26 AM
> To:
> Subject: Multiple artifacts error for modules that don't have multiple
> artifacts
> I've got a very annoying Ivy issue where I get the error " Multiple
> artifacts of the module [whatever] are retrieved to the same file!"
> This is for an internally published module which I know for a fact
> not have more than just a vanilla jar file.

I looked through the code, and what I found is that in
RetrieveEngine.determineArtifactsToCopy, where it builds a map of
retrieval conflicts, the same artifact is getting inserted twice in the
conflict map for the same revision.   I don't believe this is correct.  

This happens because one of the artifacts has an extra "qualified
attribute" called 'merged', which the other artifact does not have.
Since AbstractArtifact.equals() considers artifacts unequal if any of
the qualified attributes are different, the artifacts are considered
unequal and it causes a collision in

I am not sure the purpose of the 'merged' attribute, but should it
really determine equality of artifacts for retrieval?   I don't think it
should, but I'm not an expert.  Xavier?  Anyone?


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