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

[Ray Tsang]

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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