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Resending votes in consensus #2200

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Description of the Change

The PR introduce changes for resending votes. The feature is required due to we want to simulate the asynchronous environment among YAC processors.

Design

  • Fix voting interface of consensus: now it requires value types for propagation.
  • Add new interface for proto transport level with has feedback about the status of sending
  • Add wrapper which can resend votes if it is required

Possible Drawbacks

  • Lack of new proto transport test with different statuses.
  • Probably there are missing two things: the decline of existed calls and attempt limitation.

Signed-off-by: Fedor Muratov [email protected]

@muratovv muratovv requested review from MBoldyrev and lebdron March 27, 2019 12:12
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Please re-enable the test or provide a reason of its disabling. Also, there might be a problem as MST regression, as there is another MST test showing spontaneous failures - it is worth further investigation.

@@ -39,7 +39,7 @@ namespace iroha {
/**
* Provide current leader peer
*/
const shared_model::interface::Peer &currentLeader();
const std::shared_ptr<shared_model::interface::Peer> &currentLeader();
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I would make

Suggested change
const std::shared_ptr<shared_model::interface::Peer> &currentLeader();
std::shared_ptr<shared_model::interface::Peer> currentLeader();

as returning a reference to a local object is scary, and then

Suggested change
const std::shared_ptr<shared_model::interface::Peer> &currentLeader();
std::shared_ptr<const shared_model::interface::Peer> currentLeader();

as we do not want anyone to change the object (no matter it is an interface)

StatusCode::UNIMPLEMENTED,
StatusCode::UNAVAILABLE,
StatusCode::DATA_LOSS};
return std::any_of(codes.begin(), codes.end(), [code](auto val) {
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Suggested change
return std::any_of(codes.begin(), codes.end(), [code](auto val) {
return std::find(codes.begin(), codes.end(), code) != codes.end();

or, if using set,

Suggested change
return std::any_of(codes.begin(), codes.end(), [code](auto val) {
return codes.find(code) != codes.end();

which is faster


auto is_troubles_with_recipient = [](const auto &code) {
using namespace grpc;
std::vector<int> codes = {StatusCode::CANCELLED,
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Suggested change
std::vector<int> codes = {StatusCode::CANCELLED,
std::set<StatusCode> codes = {StatusCode::CANCELLED,

performs better lookup

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Seems that set is more appropriate because it is a more reliable way to stay unique constants.

TEST_F(BasicMstPropagationFixture,
MstStateOfTransactionWithoutAllSignaturesPropagtesToOtherPeer) {
DISABLED_MstStateOfTransactionWithoutAllSignaturesPropagtesToOtherPeer) {
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Why is the test disabled? Please provide a reason. Taking into account another failing test related to MST (see CI), I suggest possible investigating MST regression - it could cause this test failing.

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Seems, the branch was outdated and now basic_mst_state_propagation test absent.

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2 participants