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From "Eugene Koifman (JIRA)" <>
Subject [jira] [Commented] (HIVE-5627) Document 'usehcatalog' parameter on WebHCat calls
Date Sat, 09 Nov 2013 01:16:18 GMT


Eugene Koifman commented on HIVE-5627:

[] I'm not sure if I understand your comment.  The purpose of this ticket
is to document that mapreduce/jar and pig REST calls now have additional 'usehcatalog' parameter
as well as webhcat-default.xml properties that are used in conjunction with 'usehcatalog'.
 "hive" doesn't support this parameter.  What the internal variable name is in Java is not
relevant to end users.  The names in FormParam("usehcatalog") is what the REST call expects
in the query string.

> Document 'usehcatalog' parameter on WebHCat calls
> -------------------------------------------------
>                 Key: HIVE-5627
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Documentation, WebHCat
>    Affects Versions: 0.12.0
>            Reporter: Eugene Koifman
>            Assignee: Lefty Leverenz
>             Fix For: 0.13.0
> The following REST calls in WebHCat:
> 1. mapreduce/jar
> 2. pig
> now support an additional parameter 'usehcatalog'.  This is a mechanism for the caller
to tell WebHCat that the submitted job uses HCat, and thus needs to access the metastore,
which requires additional steps for WebHCat to perform in a secure cluster.  
> The JavaDoc on corresponding methods in  org.apache.hive.hcatalog.templeton.Server describe
this parameter.  
> Additionally, if templeton.hive.archive, templeton.hive.home and templeton.hcat.home
are defined in webhcat-site.xml (documented in webhcat-default.xml) then WebHCat will ship
the Hive tar to the target node where the job actually runs.  This means that Hive doesn't
need to be installed on every node in the Hadoop cluster.  (This part was added in HIVE-5547).
 This is independent of security, but improves manageability.
> This should be added to the sections in
that correspond to these methods.

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