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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-1111) Job completion notification to a job configured URL
Date Wed, 21 Mar 2007 16:22:32 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-1111?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Abdelnur updated HADOOP-1111:
---------------------------------------

    Attachment: patch-1111.txt

Fixed 2 nits:

Thread waiting for local runner case was not being done within a synchronized block, added
one. Also changed wait() to sleep() call as the thread is sleeping.

Retry attempts decrement was happening before comparison for remaining retries.

Still have to get the testcases to work, having problem getting the testcase up and running
(looking at the test cases is is missing a base TestCase class that takes care of running
local/cluster local/dfs hadoop by configuration, working on it, will be another patch).


> Job completion notification to a job configured URL
> ---------------------------------------------------
>
>                 Key: HADOOP-1111
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1111
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: mapred
>    Affects Versions: 0.12.0
>         Environment: all
>            Reporter: Alejandro Abdelnur
>         Attachments: patch-1111.txt, patch-1111.txt, patch-1111.txt, patch-1111.txt
>
>
> Currently clients have to poll the JobTracker to find if a job has completed or not.
> When invoking Hadoop from other systems is desirable to have a notification mechanism
on job completion. 
> The notification approach simplifies the client waiting for completion and removes load
from the JobTracker as polling can be avoided. 
> Proposed solution:
> When the JobTracker processes the completion of a job (success and failure)  if the job
configuration has a jobEnd.notificationUrl property it will make a HTTP GET request to the
specified URL.
> The jobEnd.notificationUrl property may include 2 variables in it '${jobId}' and '${jobStatus}'.
if they are present, they will be replaced with tehe job ID and status of the job and the
URL will be invoked.
> Two additional properties, 'jobEnd.retries' and 'jobEnd.retryInterval', will indicate
retry behavior.
> Not to delay the JobTracker processing while doing notifications, a ConsumerProducer
Queue will be used to queue up job notification upon completion.
> A daemon thread will consume job notifications from the above Queue and will make the
URL invocation. 
> On notification failure, the job notification is  queue up again on the notification
queue.
> The queue will be a java.util.concurrent.DelayQueue. This will make job notifications
(on retries) to be avaiable on the consumer side only when the retry time is up.
> The changes will be done in the JobTracker and in the LocalJobRunner.

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