[jira] [Work logged] (HIVE-21489) EXPLAIN command throws ClassCastException in Hive

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     [ https://issues.apache.org/jira/browse/HIVE-21489?focusedWorklogId=608936&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-608936 ]

ASF GitHub Bot logged work on HIVE-21489:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 09/Jun/21 06:12
            Start Date: 09/Jun/21 06:12
    Worklog Time Spent: 10m 
      Work Description: ramesh0201 opened a new pull request #2373:
URL: https://github.com/apache/hive/pull/2373


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Issue Time Tracking
-------------------

            Worklog Id:     (was: 608936)
    Remaining Estimate: 0h
            Time Spent: 10m

> EXPLAIN command throws ClassCastException in Hive
> -------------------------------------------------
>
>                 Key: HIVE-21489
>                 URL: https://issues.apache.org/jira/browse/HIVE-21489
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 2.3.4
>            Reporter: Ping Lu
>            Assignee: Ramesh Kumar Thangarajan
>            Priority: Major
>         Attachments: HIVE-21489.1.patch, HIVE-21489.2.patch
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> I'm trying to run commands like explain select * from src in hive-2.3.4,but it falls with the ClassCastException: org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer cannot be cast to org.apache.hadoop.hive.ql.parse.SemanticAnalyzer
> Steps to reproduce:
> 1）hive.execution.engine is the default value mr
> 2）hive.security.authorization.enabled is set to true, and hive.security.authorization.manager is set to org.apache.hadoop.hive.ql.security.authorization.DefaultHiveAuthorizationProvider
> 3）start hivecli to run command：explain select * from src
> I debug the code and find the issue HIVE-18778 causing the above ClassCastException.If I set hive.in.test to true，the explain command can be successfully executed。
> Now,I have one question,due to hive.in.test cann't be modified at runtime.how to run explain command with using default authorization in hive-2.3.4,



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