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https://issues.apache.org/jira/browse/HIVE-11663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14716072#comment-14716072
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liuzongquan commented on HIVE-11663:
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The implementation is improve CLIService.java and CliDriver.java. When
connecting hive throw thrift, CLIService will call function
initCustomUDF(SessionHandle sessionHandle), this will load all functions
configged in hive-udf.properties, which is a custom defined properties file
underlying $HIVE_HOME/conf. Actully, hive-udf.properties can be renamed in
hive-site.conf, which set all configuration for this feature, as below.
<property>
<name>hive.server2.customized.udf.enabled</name>
<value>false</value>
<description>Whether enable hiveserver add customized udf from adding jars,
default value is false</description>
</property>
<property>
<name>hive.server2.customized.udf.jars.path</name>
<value/>
<description/>
</property>
<property>
<name>hive.server2.customized.udf.properties</name>
<value>hive-udf.properties</value>
<description>The customized udf functions' defination file. It's must be
under $HIVE_HOME/conf directory. The patern is as
below.func_name={udf_jar_name,udf_class_name}</description>
</property>
> Auto load/unload custom udf function for hive cli and hiveserver2
> -----------------------------------------------------------------
>
> Key: HIVE-11663
> URL: https://issues.apache.org/jira/browse/HIVE-11663
> Project: Hive
> Issue Type: Improvement
> Components: CLI, Configuration
> Affects Versions: 0.14.0, 1.0.0, 1.0.1, 1.1.1, 1.2.1
> Reporter: liuzongquan
> Assignee: liuzongquan
> Labels: features, patch
> Attachments: HIVE-11663.patch
>
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> when adding custom functions used in hiveserver2, the most method is re-build
> the hive source code, re-dist and restart hiveserver2. This way will produce
> big cost for service user and cluster manager. The best way, in my opinion,
> the custom udf should be like a plugin to the hiveserver2 and hive cli, and
> users should be add and remove at run-time, especially for hiveserver2.
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