[jira] [Commented] (IVY-1399) impossible to get artifacts when data has not been loaded.

["David Turner (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IVY-1399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13976148#comment-13976148 ] 

David Turner commented on IVY-1399:
-----------------------------------

I have another one of these: https://gist.github.com/anonymous/11159231

I've attached a log and the (probably useless, since it contains two Twitter-internal deps) ivy XML file.  The dependency chain that triggers the problem is:

com.twitter.scalding_internal#job;0.0.2 requires org.slf4j#slf4j-api;1.6.1 while cascading#cascading-local;2.5.2
requires org.slf4j#slf4j-api;1.7.2.  job depends on dal, and dal depends on cascading-local. 

Note that an ivy.xml file which contains just job doesn't trigger the bug.  Not sure why.  

The ivy.xml file I was using, however, includes a second dependency, com.twitter.scalding_internal#analytics-batch.  Because
analytics-batch doesn't require any particular version of slf4j-api, and because its dependencies include 1.7.2, 1.7.2 is chosen (I think).

However, at this point, it's too late.  1.7.2 has already been "evicted" and thus its data never got loaded.  So, we crash.  We can
confirm that this is the issue by swapping the order of the two dependencies; this fixes the crash.

Hope this helps.

> impossible to get artifacts when data has not been loaded.
> ----------------------------------------------------------
>
>                 Key: IVY-1399
>                 URL: https://issues.apache.org/jira/browse/IVY-1399
>             Project: Ivy
>          Issue Type: Bug
>    Affects Versions: 2.3.0-RC2
>            Reporter: Carl Lerche
>
> I am getting the error "impossible to get artifacts when data has not been loaded. IvyNode = com.google.guava#guava;r08"
> This is happening with ivy 2.3.0-RC2.
> I am unsure what the best information to provide is, so here is the verbose output as well as ivy.xml
> https://gist.github.com/ebc2b325d333b739d0b1



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