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https://issues.apache.org/jira/browse/HIVE-18597?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gopal V updated HIVE-18597:
---------------------------
    Attachment: HIVE-18597.1.patch

> LLAP: Packaging for log4j NDC has two log4j jars it can pick
> ------------------------------------------------------------
>
>                 Key: HIVE-18597
>                 URL: https://issues.apache.org/jira/browse/HIVE-18597
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gopal V
>            Assignee: Gopal V
>            Priority: Major
>         Attachments: HIVE-18597.1.patch
>
>
> The log4j 1 and 2.x jars have NDC classes with identical package names.
> {code}
>               // log4j-1.2-API needed for NDC
>               org.apache.log4j.NDC.class,
> {code}
> Queries fail with 
> {code}
> java.lang.ClassCastException: org.apache.log4j.NDC$DiagnosticContext cannot 
> be cast to java.lang.String
>     at 
> org.apache.hadoop.hive.llap.daemon.impl.TaskRunnerCallable.setMDCFromNDC(TaskRunnerCallable.java:312)
>  ~[hive-llap-server-3.0.0-SNAPSHOT.jar:3.0.0-SNAPSHOT]
> {code}
> If the service driver packages the log4j1.x jar instead of the 2.x API shim 
> jar.



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