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https://issues.apache.org/jira/browse/HIVE-21489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16808440#comment-16808440
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Ping Lu commented on HIVE-21489:
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[~xuefuz] [~xuanhua] hi~ 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，or the
default authorization can't be used in hive-2.3.4?
> 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: Ping Lu
> Priority: Major
>
> 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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