[infinispan-dev] Is anyone else experiencing JGRP-1675

[Radim Vansa]

I remember seeing that mostly on UDP, but I've had an issue with this 
over TCP as well on the cross-site link with multiple site masters 
(synchronous 1pc xs replication).

Radim

On 10/11/2013 02:51 PM, Ray Tsang wrote:
> Udp or tcp?
>
> On Oct 11, 2013, at 8:41, Radim Vansa <rvansa at redhat.com> wrote:
>
>> Hi,
>>
>> since Infinispan moved to JGroups 3.4, we're experiencing occassional
>> deadlocks in some tests - most of threads that send anything over
>> JGroups are waiting in JGroups' FlowControl.decrementCredits. The
>> problem sometimes goes away after several seconds, but it produces some
>> ugly spikes in our througput/response time charts. Originally this
>> affected just some RadarGun tests but this is appearing in some
>> client-server tests as well (we've recently investigated an issue where
>> this appeared in a regular soak test).
>> I was looking into that [1] for some time but haven't really figured out
>> the cause. The workaround is to set up MFC and UFC credits high enough
>> (I use 10M) and stuff works then. I was trying to reproduce that on pure
>> JGroups, but unsuccessfully.
>> I am not asking anyone to dig into that, but I wanted to know whether QA
>> is alone experiencing that or if there are more of us.
>>
>> Radim
>>
>> [1] https://issues.jboss.org/browse/JGRP-1675
>>
>> --
>> Radim Vansa <rvansa at redhat.com>
>> JBoss DataGrid QA
>>
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-- 
Radim Vansa <rvansa at redhat.com>
JBoss DataGrid QA