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https://issues.apache.org/jira/browse/WAGON-432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14491388#comment-14491388
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Robert Scholte commented on WAGON-432:
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[~michael-o], well, {{HttpClient}} didn't set the {{User-Agent}}. And that's
probably correct: the application _using_ {{HttpClient}} should set its value.
Please read http://markmail.org/message/lwx5rgbd4lmttmzq to understand the
situation and why we made these changes in detail. In (very) short: the missing
{{User-Agent}} suddenly caused the following error:
{noformat}
org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata could
not be retrieved from repositories due to an error: repository
metadata for: 'artifact org.apache.maven.its.doap:maven-it-plugin' could not be
retrieved from repository: central due to an error:
Authorization failed: Access denied to:
http://repo.maven.apache.org/maven2/org/apache/maven/its/doap/maven-it-plugin/maven-metadata.xml
, ReasonPhrase:Denied Access.
{noformat}.
> Maven sends duplicate User-Agent header
> ---------------------------------------
>
> Key: WAGON-432
> URL: https://issues.apache.org/jira/browse/WAGON-432
> Project: Maven Wagon
> Issue Type: Bug
> Components: wagon-http
> Affects Versions: 2.8
> Reporter: Michael Osipov
> Priority: Minor
> Attachments:
> 0001-WAGON-432-do-not-set-User-Agent-header-by-default.patch,
> headergroup-after-setHeaders.png, headergroup-after-setUserAgent.png,
> headergroup-before-execution.png, maven-3.1.1.png, maven-3.2.2.png
>
>
> Maven 3.1.1 sends only one {{User-Agent}} header, 3.2.2 sends twice. See
> screenshots.
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