So, this is an interesting case where an asymmetric network parittion
can cause the current algorithm to cycle for several seconds, then one
participant X becomes less active (I'm not sure why), the other two
participants slowly come to an agreement, then X seems to wake up and
return everyone to the cycle/flapping loop.
SET always_last_partitions ON ... we should see convergence to correct chains.
16:35:03.986 c uses: [{epoch,321},{author,b},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:04.118 b uses: [{epoch,323},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{repair_airquote_done,{we_agree,321}},{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:04.492 c uses: [{epoch,324},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:04.520 b uses: [{epoch,325},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:04.583 a uses: [{epoch,326},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:04.894 c uses: [{epoch,327},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:04.922 b uses: [{epoch,328},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:05.291 a uses: [{epoch,329},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:05.296 c uses: [{epoch,330},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:05.324 b uses: [{epoch,331},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:05.830 c uses: [{epoch,332},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:06.023 a uses: [{epoch,333},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:06.128 b uses: [{epoch,334},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:06.342 c uses: [{epoch,335},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:06.530 b uses: [{epoch,336},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:06.734 a uses: [{epoch,337},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:06.746 c uses: [{epoch,338},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:06.932 b uses: [{epoch,339},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:07.267 c uses: [{epoch,340},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:07.334 b uses: [{epoch,341},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:07.460 a uses: [{epoch,342},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:07.669 c uses: [{epoch,343},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:07.736 b uses: [{epoch,344},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:08.165 a uses: [{epoch,345},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:08.194 c uses: [{epoch,346},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:08.541 b uses: [{epoch,347},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:08.702 c uses: [{epoch,348},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:08.894 a uses: [{epoch,349},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:08.944 b uses: [{epoch,350},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:09.212 c uses: [{epoch,351},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:09.346 b uses: [{epoch,352},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:09.598 a uses: [{epoch,353},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:09.614 c uses: [{epoch,354},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:09.748 b uses: [{epoch,355},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:10.135 c uses: [{epoch,356},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:10.150 b uses: [{epoch,357},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
16:35:10.329 a uses: [{epoch,358},{author,a},{upi,[a]},{repair,[c]},{down,[b]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,c]}]},{d2,[]}]
16:35:10.537 c uses: [{epoch,359},{author,c},{upi,[b]},{repair,[a,c]},{down,[]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[a,b,c]}]},{d2,[]}]
16:35:10.552 b uses: [{epoch,360},{author,b},{upi,[b,c]},{repair,[]},{down,[a]},{d,[{author_proc,react},{ps,[{b,a}]},{nodes_up,[b,c]}]},{d2,[]}]
So, this still pops up occasionally:
% rebar skip_deps=true -v eunit suites=machi_flu0_test,machi_chain_manager1
[...]
a private: [{epoch,223},{author,a},{upi,[a,b]},{repair,[]},{down,[c]},{d,[{author_proc,react},{nodes_up,[a,b]}]},{d2,[{up_nodz,[a,b]},{hooray,{v2,{2014,11,3},{20,19,57}}}]}]
b private: [{epoch,224},{author,b},{upi,[b,a]},{repair,[]},{down,[c]},{d,[{author_proc,react},{nodes_up,[a,b]}]},{d2,[{up_nodz,[a,b]},{hooray,{v2,{2014,11,3},{20,19,57}}}]}]
c private: [{epoch,191},{author,c},{upi,[c]},{repair,[]},{down,[a,b]},{d,[{author_proc,react},{nodes_up,[c]}]},{d2,[{up_nodz,[c]},{hooray,{v2,{2014,11,3},{20,19,57}}}]}]
The mis-ordering between [a,b] and [b,a] happens after the partition settled
on the islands of [a,b] and [c].
{ c100 , ? LINE , _AnyOtherReturnValue } {c100,734,
{err,error,
{badmatch,[a,b]},
from,
[{epoch,70},
{author,a},
{upi,[a]},
{repair,[b]},
{down,[c]},
{d,
[{author_proc,react},
{nodes_up,[a,b]}]},
{d2,[]}],
to,
[{epoch,194},
{author,b},
{upi,[b,a]},
{repair,[]},
{down,[c]},
{d,
[{author_proc,react},
{nodes_up,[a,b]}]},
{d2,[]}],
relative_to,a,stack,[...]
That diagram is really valuable, but it also takes a long time
to make any kind of edit; the process is too slow. This is a todo
item a reminder that the flowchart is important documentation and
must be brought back into sync with the code soon.
