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Avoid some projection churn in C100's sanity check

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Scott Lystig Fritchie 2015-09-21 18:30:47 +09:00
parent 5010d03677
commit d9b9397e75
1 changed files with 32 additions and 1 deletions
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33
src/machi_chain_manager1.erl
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@ -613,6 +613,9 @@ rank_and_sort_projections_with_extra(All_queried_list, FLUsRs, ProjectionType,
NotBestPsEpochFilt =
[Proj || Proj <- Ps, Proj /= BestProj,
Proj#projection_v1.epoch_number == BestEpoch],
BadAnswers2 = [Answer || {_FLU, Answer} <- FLUsRs,
not is_record(Answer, projection_v1)
orelse Answer /= BestProj],
%% Wow, I'm not sure how long this bug has been here, but it's
%% likely 5 months old (April 2015). I just now noticed a problem
%% where BestProj was epoch 1194, but NotBestPs contained a
@ -1732,10 +1735,38 @@ react_to_env_C100(P_newprop,
?REACT(c100),
P_cur_for_sanity = if CMode == cp_mode ->
P_current_calc;
%% Assume E = P_latest's epoch #. P_current
%% may be at epoch E-delta but P_current_calc
%% is at exactly E because E-delta is stale,
%% and the CP world has changed while we were
%% napping. But the "exactly epoch E" will
%% cause problems for the strictly monotonic
%% epoch check in our sanity checking. So we
%% fake the epoch number here to work around
%% the strictly-SI check.
%%
%% If we don't fake the epoch here, then (I
%% have observed today) that we go through
%% several insane projection attempts and then
%% reset and eventually come to the right
%% answer ... but this churn is avoidable, and
%% for CP mode this is an ok safeguard to bend
%% expressly because of the make_zerf() aspect
%% of CP's chain processing.
E_c = P_current#projection_v1.epoch_number,
P_current_calc#projection_v1{epoch_number=E_c};
CMode == ap_mode ->
P_current
end,
?REACT({c100, ?LINE,
[{current_epoch, P_cur_for_sanity#projection_v1.epoch_number},
{current_author, P_cur_for_sanity#projection_v1.author_server},
{current_upi, P_cur_for_sanity#projection_v1.upi},
{current_repairing, P_cur_for_sanity#projection_v1.repairing},
{latest_epoch, P_latest#projection_v1.epoch_number},
{latest_author, P_latest#projection_v1.author_server},
{latest_upi, P_latest#projection_v1.upi},
{latest_repairing, P_latest#projection_v1.repairing}]}),
Sane = projection_transition_is_sane(P_cur_for_sanity, P_latest, MyName),
if Sane == true ->
ok;