users@grizzly.java.net

Re: CometEngine in 1.0.20 dropping packets

From: Jeanfrancois Arcand <Jeanfrancois.Arcand_at_Sun.COM>
Date: Mon, 04 May 2009 13:25:58 -0400

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
>>>
>>>
>>
>>
>>
>