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https://issues.apache.org/jira/browse/KYLIN-4523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17117306#comment-17117306
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ASF GitHub Bot commented on KYLIN-4523:
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nichunen merged pull request #1232:
URL: https://github.com/apache/kylin/pull/1232
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> 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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