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Posted to issues@hive.apache.org by "Zhihua Deng (Jira)" <ji...@apache.org> on 2020/07/16 13:08:00 UTC
[jira] [Commented] (HIVE-23858) In multi-HS2 setup, if a new
function is registered on one of them, it is not available on remaining
HS2's unless reload-function is run
[ https://issues.apache.org/jira/browse/HIVE-23858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17159201#comment-17159201 ]
Zhihua Deng commented on HIVE-23858:
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Hi [~adeshrao], to my knowledge, this can be achived by enable hive.allow.udf.load.on.demand in HS2, if the current HS2 doesn't find the permenant function registered by other instances in his registry, he will refer to metastore for the function definition. There has seen some potential npe problem when ontaining functions from metastore as described in [HIVE-20441|https://issues.apache.org/jira/browse/HIVE-20441].
> In multi-HS2 setup, if a new function is registered on one of them, it is not available on remaining HS2's unless reload-function is run
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-23858
> URL: https://issues.apache.org/jira/browse/HIVE-23858
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2
> Reporter: Adesh Kumar Rao
> Assignee: Adesh Kumar Rao
> Priority: Minor
>
> When multiple HS2's are running and a function is registered on one of them, we need to connect to each of remaining HS2's explicitly and run reload-functions command.
>
> Without doing reload-function, if we try using the function in any of the remaining HS2's, the command will fail saying invalid function.
>
> The idea here is to check for function existence, not only in functionRegistry but also from metastore if the function does not exists in registry.
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