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 <rva...@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 <rva...@redhat.com> >> JBoss DataGrid QA >> >> _______________________________________________ >> infinispan-dev mailing list >> infinispan-dev@lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/infinispan-dev > _______________________________________________ > infinispan-dev mailing list > infinispan-dev@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev -- Radim Vansa <rva...@redhat.com> JBoss DataGrid QA _______________________________________________ infinispan-dev mailing list infinispan-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev
