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From "Daniel Dai (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-21489) explain command throw ClassCastException in 2.3.4
Date Tue, 16 Apr 2019 17:45:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-21489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16819335#comment-16819335
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Daniel Dai commented on HIVE-21489:
-----------------------------------

[~Ping Lu], the patch would fix the issue of explain when DefaultHiveAuthorizationProvider
is configured. However, DefaultHiveAuthorizationProvider is deprecated and you shall go with
SQLStdHiveAuthorizerFactory (set hive.security.authorization.manager=org.apache.hadoop.hive.ql.security.authorization.plugin.sqlstd.SQLStdHiveAuthorizerFactory).
If you have to use DefaultHiveAuthorizationProvider, you can apply the patch and rebuild.
But I won't commit the patch to master as we intend to remove DefaultHiveAuthorizationProvider
in future.

> explain command throw ClassCastException in 2.3.4
> -------------------------------------------------
>
>                 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: Daniel Dai
>            Priority: Major
>         Attachments: HIVE-21489.1.patch, HIVE-21489.2.patch
>
>
> 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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