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https://issues.apache.org/jira/browse/KYLIN-4523?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhichao  Zhang updated KYLIN-4523:
----------------------------------
    Sprint: Sprint 51

> Loading HttpContext class twice leads to LinkageError error.
> ------------------------------------------------------------
>
>                 Key: KYLIN-4523
>                 URL: https://issues.apache.org/jira/browse/KYLIN-4523
>             Project: Kylin
>          Issue Type: Bug
>            Reporter: Zhichao  Zhang
>            Assignee: Zhichao  Zhang
>            Priority: Minor
>             Fix For: v3.1.0
>
>
> After upgrading httpclient to 4.3.6, on CDH 5.7 env it will lead to 
> LinkageError occured, because it loades HttpContext class in two different 
> ClassLoader (CustomizedWebappClassloader and AppClassLoader):
> Error message:
> {code:java}
> java.lang.LinkageError: loader constraint violation: when resolving method 
> "org.apache.http.protocol.HttpCoreContext.<init>(Lorg/apache/http/protocol/HttpContext;)V"
>  the class loader (instance of 
> org/apache/kylin/ext/CustomizedWebappClassloader) of the current class, 
> org/apache/http/client/protocol/HttpClientContext, and the class loader 
> (instance of sun/misc/Launcher$AppClassLoader) for the method's defining 
> class, org/apache/http/protocol/HttpCoreContext, have different Class objects 
> for the type org/apache/http/protocol/HttpContext used in the signature{code}



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