[jira] [Commented] (HIVE-15828) LLAP: Create root path of znode in init/start of registry service

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-15828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15854970#comment-15854970 ] 

Sergey Shelukhin commented on HIVE-15828:
-----------------------------------------

Hmm.. that can only be done if you know what ACL it should have, which may not be known in a general case in an R/O registry (since the standard acl is write hive only, read world, so status could be running under any user not related to LLAP user)

> LLAP: Create root path of znode in init/start of registry service
> -----------------------------------------------------------------
>
>                 Key: HIVE-15828
>                 URL: https://issues.apache.org/jira/browse/HIVE-15828
>             Project: Hive
>          Issue Type: Bug
>          Components: llap
>    Affects Versions: 2.2.0
>            Reporter: Prasanth Jayachandran
>            Assignee: Prasanth Jayachandran
>
> When there are no llap daemons running, if getInstances() in registry service is invoked this can result in InvalidACLException since no daemons created zpath yet. The root path will not exist when instance cache populates entries under root path. If the root path creation is moved to init/start then getInstances() can return empty instead of failing with exception. 



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