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Re: CometEngine in 1.0.20 dropping packets

From: Jeffrey Kesselman <jeffpkworkfwd_at_gmail.com>
Date: Mon, 4 May 2009 15:58:05 -0400

Here is the version of my code I'm working with right now. I've
included a readme with reproduction instructions.

I really hope its something dumb I'm doing...

JK







On May 4, 2009, at 1:25 PM, Jeanfrancois Arcand wrote:

> Salut,
>
> can you share a test case? If you can't share it public, drop me an
> email at jfarcand_at_apache.org
>
> Thanks!
>
> -- Jeanfrancois
>
> Jeffrey Kesselman wrote:
>> Unfortunately, it didn't help :/
>> Still the same behavior. I do the two notifies one right after the
>> other and the second one is dropped silently.
>> I put a 500ms sleep ebwteen the two and it works.
>> Both states are 100% reproducible.
>> JK
>> On May 4, 2009, at 12:44 PM, Jeffrey Kesselman wrote:
>>>
>>> Hi JeanFrancois
>>>
>>> Thanks for the quick answer. I have my onEvent synchronized
>>> already. (Tried that first thing to make sure it
>>> wasn't MY race somehow :) )
>>>
>>> I'll try CometContext.setBlockingNotification(true)
>>>
>>> Thanks
>>>
>>> JK
>>>
>>>
>>>> Salut,
>>>>
>>>> Jeffrey Kesselman wrote:
>>>> > Hey Guys,
>>>> > > I've run into what seems to be a clear race condition. I
>>>> have two calls > to notify in a row in my code. (One is a READ
>>>> type the other is a > Notify type).
>>>> > When they occur immediately right after each other, the second
>>>> packet is > silently dropped. if i put a 500 ms sleep between
>>>> them, they work fine.
>>>> > > is this a known race condition? Are there known work arounds
>>>> other then > the evil sleep?
>>>>
>>>> If you synchronize your onEvent method, does it help? Another
>>>> workaround is to call
>>>> CometContext.setBlockingNotification(true)....but I would try
>>>> first with sync to see if that help.
>>>>
>>>> Thanks!
>>>>
>>>> -- Jeanfrancois
>>>>
>>>>
>>>
>>>
>>>