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

[Dan Berindei]

I changed the default config some time ago, but I forgot to close ISPN-3334.


On Fri, Oct 11, 2013 at 4:35 PM, Ray Tsang <saturnism at gmail.com> wrote:

> also, don't forget this one: https://issues.jboss.org/browse/ISPN-3334
>
>
> On Fri, Oct 11, 2013 at 9:22 AM, Erik Salter <an1310 at hotmail.com> wrote:
>
>> Hi Radim,
>>
>> If you're using VMs, this may be of use.  I actually experienced a JGroups
>> lockup in production with FC in decrementCredits.  What happened in my
>> case
>> is that virtualization tools had actually screwed with the system clock --
>> it was reported that JBoss took ~1 year to start.
>>
>> http://www.vmware.com/pdf/vmware_timekeeping.pdf
>>
>> The upshot is that I had to take FC out of my stack going forward.
>>
>> Erik
>>
>> -----Original Message-----
>> From: infinispan-dev-bounces at lists.jboss.org
>> [mailto:infinispan-dev-bounces at lists.jboss.org] On Behalf Of Radim Vansa
>> Sent: Friday, October 11, 2013 8:41 AM
>> To: infinispan-dev at lists.jboss.org
>> Subject: [infinispan-dev] Is anyone else experiencing JGRP-1675
>>
>> 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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>
>
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