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From "Nandika Jayawardana (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ODE-563) Clustering
Date Fri, 21 Mar 2014 16:11:46 GMT

    [ https://issues.apache.org/jira/browse/ODE-563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13943191#comment-13943191

Nandika Jayawardana commented on ODE-563:

The locking mechanism is to prevent concurrent modification of the instance state from threads
operating on the same process instance from two nodes. Currently the instance lock which prevent
multiple threads from concurrently operating on the same process instance is handled by nstanceLockManager
class which only works for one node. 


I found a reference in the riftsaw jira for this as well.


Transaction rollback and retry mechanism from the scheduler should recover the instance in
this scenario as noted in the jira, however, there would still be exceptions written to the
log which should be preventable though an improved locking technique which works on the cluster.

> Clustering
> ----------
>                 Key: ODE-563
>                 URL: https://issues.apache.org/jira/browse/ODE-563
>             Project: ODE
>          Issue Type: Bug
>          Components: Deployment
>    Affects Versions: 1.2
>            Reporter: Sabir Ahamed
>            Assignee: Jeff Yu
>              Labels: gsoc2014
>             Fix For: 1.4
> We need to deploy Apache ODE in clustered environment to meet requirements for one of
our projects. 
> Per FAQ, the clustering support is under development, but it is not listed in the Roadmap.

> We need to know if clustering support will be provided in the next release i.e. 1.3.

> We will greatly appreciate if you let us know when this support will be added or if there
is any workaround.

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