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From "Alejandro Abdelnur (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OOZIE-592) new WF library implementation (lite2)
Date Wed, 02 Nov 2011 19:09:32 GMT

    [ https://issues.apache.org/jira/browse/OOZIE-592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13142422#comment-13142422
] 

Alejandro Abdelnur commented on OOZIE-592:
------------------------------------------

In addition, WF state would be serialized as JSON data in the DB instead of Writable
                
> new WF library implementation (lite2)
> -------------------------------------
>
>                 Key: OOZIE-592
>                 URL: https://issues.apache.org/jira/browse/OOZIE-592
>             Project: Oozie
>          Issue Type: Improvement
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>
> Current WF library implementation (lite) has the following issues/limitations:
> * Under certain conditions kill/failure all running actions are not being properly killed
(leaving things in odd states and/or runaway actions)
> * Exceptions are properly propagated handled
> * start/end/kill/fork/join nodes do not  provide hooks to create entries in the DB in
the WF actions table (useful for WF visualization)
> In addition, the following new features would allow more flexible WF programming:
> * support for a SUSPEND node, to programmatically suspend a WF in certain condition.
> * support for SHARD/UNSHARD nodes, similar to FORK/JOIN but it is a single execution
lane that gets multiplexed N times
> These 2 new features would be exposed in a new schema.
> The implementation approach for this would be broken down into a few JIRAs:
> * WF lite2 implementation with testcases
> * WF lite2 node handlers
> * WF lite2 service

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