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https://issues.apache.org/jira/browse/FLUME-3114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16093050#comment-16093050
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Attila Simon commented on FLUME-3114:
-------------------------------------

Linking related tickets. Please note that both 
commons-httpclient:commons-httpclient and org.apache.httpcomponents:httpclient 
(new maven group/artifact name) are loaded into flume classpath. Ideal state 
would be to depend only this one:
https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient

Excerpt from dependecy:tree (it appears multiple places in the dep:tree I 
copied only a single location)
{noformat}
org.apache.flume.flume-ng-sinks:flume-ng-elasticsearch-sink:jar:1.8.0-SNAPSHOT
+- org.apache.httpcomponents:httpclient:jar:4.2.1:compile
{noformat}


> Upgrade commons-httpclient library dependency
> ---------------------------------------------
>
>                 Key: FLUME-3114
>                 URL: https://issues.apache.org/jira/browse/FLUME-3114
>             Project: Flume
>          Issue Type: Bug
>    Affects Versions: 1.7.0
>            Reporter: Attila Simon
>            Priority: Critical
>              Labels: dependency
>             Fix For: 1.8.0
>
>
> ||Group||Artifact||Version used||Upgrade target||
> |commons-httpclient|commons-httpclient|3.1,3.0.1|4.5.2|
> Note: This artifact was moved to:
> * New Group   org.apache.httpcomponents
> * New Artifact        httpclient
> Security vulnerability: https://www.cvedetails.com/cve/CVE-2012-5783/
> Please do:
> - double check the newest version. 
> - consider to remove a dependency if better alternative is available.
> - check whether the lib change would introduce a backward incompatibility (in 
> which case please add this label `breaking_change` and fix version should be 
> the next major)



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