No, because if they were ran before by a crashed/stopped instance they will be
only picked again by this instance, see
JobSandbox.runByInstanceId field and its use in JobManager.poll()
That's whay I prefer the
semaphore="fail" on the related service
solution to prevent collisions and still allow jobs to be picked by any
machines on the cluster.
The only thing I still wonder about is the impact of maxretry, hence my comment
in the Jira I posted below
unique.instanceId is convenient in case you want to explicitly run a job on a
machine...
Jacques
From: "Mike" <[email protected]>
Thanks Jacques. It sounds like it is good practice to have separate
"unique.instanceId" for each VM, but having separate pools are optional.
If I kill a VM, and there were outstanding jobs, will another instance
take over?
On Wed, Mar 21, 2012 at 6:28 AM, Jacques Le Roux <
[email protected]> wrote:
From: "Mike" <[email protected]>
Playing around with running multiple instances of OFBiz in it's own VM, in
a cloud environment, to the same DB.
I ran across this on the OpenTaps docs:
Service engine job pool:
Modify the file framework/service/config/**serviceengine.xml for each of
your
instances and edit the thread-pool's send-to-pool and run-from-pool to be
different for each instance. For example:
<thread-pool send-to-pool="opentaps1"> . . . <run-from-pool
name="opentaps1"/></thread-**pool>
What is the purpose of this?
You don't need this as long as you don't need to isolate some jobs and
want them running only on one of the machines (for performance or other
reasons)
Is this so that jobs originated on each
instance are tracked separately on the DB?
Yes, you can say that
Is there anything else that
needs to be tweaked config-wise so the multiple instances don't collide?
You should not get multiple instances colliding. If you want only one
instance of a job to run at a time I'd recommned to set
semaphore="fail" on the related service
You may also consider unique.instanceId in general.properties, look at
this thread
http://markmail.org/message/**xhc6nfbzsd5ezscg<http://markmail.org/message/xhc6nfbzsd5ezscg>
And if you want to get confused a bit you might look at
https://issues.apache.org/**jira/browse/OFBIZ-4602?**
focusedCommentId=13199868&**page=com.atlassian.jira.**
plugin.system.issuetabpanels:**comment-tabpanel#comment-**13199868<https://issues.apache.org/jira/browse/OFBIZ-4602?focusedCommentId=13199868&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13199868>
Jacques
