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https://issues.apache.org/jira/browse/OFBIZ-431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12464423
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Scott Gray commented on OFBIZ-431:
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Hi Jonathan

I really don't think I'd be of much help on this one, I've only done a once 
over on this myself and that was 2 months ago.  I think this issue needs 
someone with a fair bit of order component experience or a lot of time, and I'm 
afraid I have neither at the moment.  I can't really even offer any pointers 
about where to look first.

I am going to look over it again when I have time but it won't be in the next 
few days, sorry.

> Editting Order goes recursive with promotions...
> ------------------------------------------------
>
>                 Key: OFBIZ-431
>                 URL: https://issues.apache.org/jira/browse/OFBIZ-431
>             Project: Apache OFBiz (The Open for Business Project)
>          Issue Type: Bug
>          Components: order
>    Affects Versions: SVN trunk
>         Environment: N/A - clean default
>            Reporter: Ray Barlow
>         Assigned To: Jacopo Cappellato
>            Priority: Critical
>
> With the standard demo data raise an order for admin with 1 GZ-1000 and 1 
> GZ-7000, 3 promotional products will be added to the order which is fine.
> Find and view the newly created order in the order application. Click on the 
> edit link and then try to increase the order quantity of the GZ-1000 from 1 
> to 2, the system will thrash away for a while and then fail with a 
> transaction error, timed out.
> Once the dust has settled you can see that the party has also been sent 100 
> +/-5 email notification changes, which is were I'm getting the feeling that 
> recursion is the problem!
> Trying to cancel a line item can also cause the same effect, in general 
> editting orders with promotions seems to cause lots of problems at the moment.
> PS: I'd advise this only gets tested on local development machines as the 
> impact is quite an intense load on the server and can result in DoS style 
> problems. That said I did execute this once on the "demo.dejc.com" server 
> (sorry David) just to check it wasn't anything I'd changed, the admin account 
> now has a lot of order change notifications (at least until the next reload 
> of the site!).
> PPS: This can also be triggered via the customer facing site, when cancelling 
> a line item from the order history page, bit of an exposure for live sites to 
> DoS from malicious users.

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