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From Aaron Cody <>
Subject Re: Jobs view .. how to hook into it....
Date Wed, 29 Jan 2014 18:29:26 GMT
yes both of those thingsŠ and maybe a bit more explanation on how they were
implemented for Hive/Pig Š
Also, the workflow.workflowcontext column Š looks like a blob of JSON which
I guess ends up in some model in the web app? but how to construct it..?
(the regex code in is not exactly
straightforward :)  )

From:  Billie Rinaldi <>
Reply-To:  <>
Date:  Wed, 29 Jan 2014 07:03:32 -0800
To:  <>
Subject:  Re: Jobs view .. how to hook into it....

Sure.  Which part is confusing?  The adjacencies?  Or why you would use it
at all?

On Tue, Jan 28, 2014 at 4:47 PM, Aaron Cody <> wrote:
> thanks Billie - do you think you could go into a little more detail about the
> workflow DAG stuff on the wiki? it¹s a little cryptic (to me anyway)  :)
> From:  Billie Rinaldi <>
> Reply-To:  <>
> Date:  Mon, 20 Jan 2014 07:40:04 -0800
> To:  <>
> Subject:  Re: Jobs view .. how to hook into it....
> In Hadoop 1 only, there is a log4j appender on the JobTracker/JobHistory that
> inserts the data into postgres (or whichever db you have configured).  The
> code is in contrib/ambari-log4j.
> Billie
> On Fri, Jan 17, 2014 at 1:59 PM, Aaron Cody <> wrote:
>> hello
>> I¹m looking at integrating my own process into the Ambari ŒJobs¹ view Š and I
>> can see how the web side of things works .. i.e. the view makes REST calls to
>> the server which in turn results in a query to postgres to get the job stats
>> Š but what is not so clear is how those job/task stats get into postgres in
>> the first placeŠ.
>> Q: for example, with MapReduce .. is Hadoop/JobTracker somehow inserting the
>> job/task info into postgres directly? Or is there some other mechanism in
>> Ambari that is listening for map reduce jobs/tasks to start/finish?
>> any hints on where to look in the source tree would be greatly appreciated
>> TIA

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