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From "Aihua Xu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-17659) get_token thrift call fails for DBTokenStore in remote HMS mode
Date Mon, 02 Oct 2017 18:20:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-17659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188553#comment-16188553
] 

Aihua Xu commented on HIVE-17659:
---------------------------------

I see. Ideally we need to create a wrapper class with the returned token to be optional field,
but seems it's safe to return empty for this particular thrift call. 

+1. 

> get_token thrift call fails for DBTokenStore in remote HMS mode
> ---------------------------------------------------------------
>
>                 Key: HIVE-17659
>                 URL: https://issues.apache.org/jira/browse/HIVE-17659
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 2.1.0, 2.1.1, 2.2.0
>            Reporter: Vihang Karajgaonkar
>            Assignee: Vihang Karajgaonkar
>         Attachments: HIVE-17659.01-branch-2.patch
>
>
> The {{get_token(String tokenIdentifier)}} HMS thrift API fails when HMS is deployed in
remote mode and when there is no token found with that tokenIndentifier. This could happen
when an application calls a renewDelegationToken on an expired/cancelled delegation token.
The issue is that get_token tries to return a null result values which cannot be done in Thrift.
The API call errors out with {{org.apache.thrift.TApplicationException unknown result}} exception
which is uncaught and HS2 thrift server closes the client transport. So no further calls from
that connection can be accepted unless client reconnects to HS2 again.



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