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http://jira.codehaus.org/browse/WAGON-224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=139987#action_139987
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John Casey commented on WAGON-224:
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for the uninitiated, that's maven-artifact at:
http://svn.apache.org/repos/asf/maven/artifact/trunk
> ChecksumObserver sets digest == null on transfer error, leading to NPE's if
> checksum downloads are retried with same observer instance
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: WAGON-224
> URL: http://jira.codehaus.org/browse/WAGON-224
> Project: Maven Wagon
> Issue Type: Bug
> Components: wagon-provider-api
> Affects Versions: 1.0-beta-3
> Reporter: John Casey
> Priority: Blocker
>
> See maven-artifact (3.0-snapshot), file DefaultWagonManager.java, line ~506.
> I had to adjust this to reinit the checksum observer for each download
> attempt, since transfer error events broadcast to the observer will cause a
> NPE, making that observer impossible to reuse. The digester instance is set
> to null instead of reset.
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