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

(1) Taking flow control out of a config is a *bad thing* unless * your message is small or * you make a blocking RPC. In this case you could use NO_FC, bypassing flow control. Not sure if Infinispan does this

(2) Use MFC/UFC rather than FC, which is deprecated

On 10/11/13 3:22 PM, Erik Salter 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(a)lists.jboss.org > [mailto:infinispan-dev-bounces@lists.jboss.org] On Behalf Of Radim Vansa > Sent: Friday, October 11, 2013 8:41 AM > To: infinispan-dev(a)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(a)redhat.com&gt; > JBoss DataGrid QA > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev > > _______________________________________________ > infinispan-dev mailing list > infinispan-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev >