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Posted to common-dev@hadoop.apache.org by "Arun C Murthy (JIRA)" <ji...@apache.org> on 2008/10/16 00:18:46 UTC
[jira] Commented: (HADOOP-4421) Rework job-setup and job-cleanup
tasks
[ https://issues.apache.org/jira/browse/HADOOP-4421?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12639991#action_12639991 ]
Arun C Murthy commented on HADOOP-4421:
---------------------------------------
I propose we bite the bullet and introduce an enum TaskType {MAP, REDUCE, SETUP, CLEANUP} while we fix this...
> Rework job-setup and job-cleanup tasks
> --------------------------------------
>
> Key: HADOOP-4421
> URL: https://issues.apache.org/jira/browse/HADOOP-4421
> Project: Hadoop Core
> Issue Type: Bug
> Components: mapred
> Affects Versions: 0.19.0
> Reporter: Arun C Murthy
> Fix For: 0.20.0
>
>
> Currently we have a notion of map-{setup|cleanup} TIP and reduce-{setup|cleanup} TIP of which only 1 setup and cleanup tasks are picked by the JobInProgress. Also a lot of state-maintenence of these TIPs are done by the JobInProgress itself, outside of the more logical place i.e. TaskInProgress.
> We really should rework this to have a single setup and cleanup task which isn't associated with a map or reduce task i.e. into separate task _types_. What we have currently is quite ungainly and hard to maintain.
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