[PATCH] raft: add more information to start_read_barrier error

[Gleb Natapov]

Add requester into to the error about requester being out of config.
Also fix a type while we are at it.

---

CI: https://jenkins.scylladb.com/job/scylla-master/job/scylla-ci/12258/


diff --git a/raft/fsm.cc b/raft/fsm.cc
index 18620abeb09..8def0afe5f8 100644
--- a/raft/fsm.cc
+++ b/raft/fsm.cc
@@ -1111,10 +1111,10 @@ void fsm::handle_read_quorum_reply(server_id from, const read_quorum_reply& repl
std::optional<std::pair<read_id, index_t>> fsm::start_read_barrier(server_id requester) {
check_is_leader();

- // Make sure that only a leader or a not that is part of the config can request read barrier
+ // Make sure that only a leader or a node that is part of the config can request read barrier
// Nodes outside of the config may never get the data, so they will not be able to read it.
if (requester != _my_id && leader_state().tracker.find(requester) == nullptr) {
- throw std::runtime_error("Read barrier requested by a node outside of the configuration");
+ throw std::runtime_error(fmt::format("Read barrier requested by a node outside of the configuration {}", requester));
}

auto term_for_commit_idx = _log.term_for(_commit_idx);
--
Gleb.