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From "Venkatesh Seetharam (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FALCON-507) HiveCatalogService has hardcode the database name "default" to check whether the service is up.
Date Wed, 16 Jul 2014 05:55:05 GMT

    [ https://issues.apache.org/jira/browse/FALCON-507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14063193#comment-14063193
] 

Venkatesh Seetharam commented on FALCON-507:
--------------------------------------------

Bosco reported: I tried dropping the “default” DB and it failed.
{code}
hive> drop database default cascade; 
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException(message:Can
not drop default database)
{code}

Looks like we should be fine. A better alternate would be to list databases than fetching
a specific one.

[~sushanth], [~thejas], thoughts?

> HiveCatalogService has hardcode the database name "default" to check whether the service
is up. 
> ------------------------------------------------------------------------------------------------
>
>                 Key: FALCON-507
>                 URL: https://issues.apache.org/jira/browse/FALCON-507
>             Project: Falcon
>          Issue Type: Bug
>    Affects Versions: 0.5
>            Reporter: Venkatesh Seetharam
>              Labels: hive
>             Fix For: 0.6
>
>
> Don Bosco Durai reported in an email to me:
> While debugging the issue, it seems HiveCatalogService has hardcode the database name
"default" to check whether the service is up. I think this check will fail if the customer
has dropped the database "default" in production.
> {code}
> @Override
>     public boolean isAlive(final String catalogUrl,
>                            final String metaStorePrincipal) throws FalconException {
>         LOG.info("Checking if the service is alive for: " + catalogUrl);
>         try {
>             HCatClient client = getProxiedClient(catalogUrl, metaStorePrincipal);
>             HCatDatabase database = client.getDatabase("default");
>             return database != null;
>         } catch (HCatException e) {
>             throw new FalconException("Exception checking if the service is alive:" +
e.getMessage(), e);
>         }
>     }
> {code}
> Thanks Bosco.



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