Note that FRAG3 is relatively recent... On 22/02/17 21:01, Dan Berindei wrote: > +1 to add FRAG3 back in, with frag_size="200k" to make fragmentation > less likely, yet stay under max_credits * min_threshold. > > Dan > > On Wed, Feb 22, 2017 at 9:41 PM, Alan Field <afi...@redhat.com> wrote: >> >> >> ----- Original Message ----- >>> From: "Pedro Ruivo" <pe...@infinispan.org> >>> To: "ispn-dev" <infinispan-dev@lists.jboss.org> >>> Sent: Wednesday, February 22, 2017 9:59:21 AM >>> Subject: [infinispan-dev] Default TCP configuration is broken. >>> >>> Hi team, >>> >>> The 'default-jgroups-tcp.xml" has MFC protocol without the FRAG2/3 >>> protocol. This is broken when we send a multicast message larger than >>> 'max-credits'. It will block forever in MFC [1]. No timeouts since we >>> don't have the CompletableFuture at this point. >>> >>> Possible solutions are: >>> >>> #1 put back FRAG2/3 >>> >>> advantage: we have multicast flow control. >>> disadvantage: all messages are fragmented (unicast and multicast), that >>> probably requires more resources (more messages in NAKACK and UNICAST >>> tables?) >> >> This is my preferred solution, since removing MFC did not work for me! >> >> Thanks, >> Alan >> >>> >>> #2 remove MFC >>> >>> advantage: probably low resources usages. TCP will handle any fragmentation. >>> disadvantage: we don't have multicast flow control. >>> >>> #3 alternative? >>> >>> Cheers, >>> Pedro >>> >>> [1] actually, I need a thread dump to confirm it. >>> _______________________________________________ >>> 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 > _______________________________________________ > infinispan-dev mailing list > infinispan-dev@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/infinispan-dev >
-- Bela Ban, JGroups lead (http://www.jgroups.org) _______________________________________________ infinispan-dev mailing list infinispan-dev@lists.jboss.org https://lists.jboss.org/mailman/listinfo/infinispan-dev
