zhjwpku commented on code in PR #1033:
URL: https://github.com/apache/iceberg-cpp/pull/1033#discussion_r4347675723
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src/iceberg/catalog/rest/auth/auth_session_internal.h:
##########
@@ -182,73 +200,89 @@ class OAuth2Session final : public AuthSession,
const OAuthTokenResponse& token_response,
std::optional<std::chrono::steady_clock::time_point>
token_request_started_at) {
UpdateTokenState(token_response, token_request_started_at);
- if (config_.keep_refreshed &&
- expires_at_ != std::chrono::steady_clock::time_point{}) {
- ScheduleRefresh();
+ if (!scheduler_) {
+ return;
+ }
+ // Refresh an already-expired initial token immediately.
+ if (auto delay = CalculateRefreshDelay()) {
+ ScheduleRefresh(*delay);
}
}
- void DoRefresh() {
- DoRefreshAttempt(0, std::chrono::milliseconds(200),
std::chrono::steady_clock::now());
- }
-
- void DoRefreshAttempt(int attempt, std::chrono::milliseconds backoff,
- std::chrono::steady_clock::time_point
refresh_started_at) {
- static constexpr int kMaxRetries = 5;
- static constexpr auto kMaxBackoff = std::chrono::milliseconds(10'000);
+ // Complete one refresh, including HTTP retries, on the executor's worker.
+ std::optional<std::chrono::milliseconds> Refresh() {
RefreshAttemptGuard guard(*this);
- if (closed_.load()) return;
+ if (!guard.IsActive()) {
+ return std::nullopt;
+ }
+
+ auto result = RetryRunner<retry::StopRetryOn<>>({.num_retries =
5}).Run([this] {
+ return RefreshToken();
+ });
+ if (!result.has_value()) {
+ ICEBERG_LOG_WARN("Failed to refresh OAuth2 token: {}",
result.error().message);
+ return std::nullopt;
+ }
+ return *result;
+ }
- auto empty_session = AuthSession::MakeDefault({});
- // TODO(lishuxu): Honor token-exchange-enabled and refresh via token
exchange,
- // matching Java.
- auto result = OAuth2Util::FetchToken(*client_, *empty_session,
refresh_properties_);
- if (result.has_value()) {
- auto& response = result.value();
+ Result<std::optional<std::chrono::milliseconds>> RefreshToken() {
+ {
+ std::lock_guard lock(refresh_mutex_);
+ if (closed_) {
+ return std::nullopt;
+ }
+ }
+ try {
+ auto request_started_at = std::chrono::steady_clock::now();
+ auto empty_session = AuthSession::MakeDefault({});
+ // TODO(lishuxu): Honor token-exchange-enabled when refreshing tokens.
+ ICEBERG_ASSIGN_OR_RAISE(
+ auto response,
+ OAuth2Util::FetchToken(*client_, *empty_session,
refresh_properties_));
{
std::unique_lock lock(mutex_);
- UpdateTokenState(response, refresh_started_at);
+ UpdateTokenState(response, request_started_at);
}
- ScheduleRefresh();
- return;
- }
-
- if (attempt + 1 < kMaxRetries && !closed_.load()) {
- auto next_backoff =
-
std::min(std::chrono::duration_cast<std::chrono::milliseconds>(backoff * 2),
- kMaxBackoff);
- std::weak_ptr<OAuth2Session> weak_self = shared_from_this();
- auto retry_id = TokenRefreshScheduler::Instance().Schedule(
- backoff, [weak_self = std::move(weak_self), next_attempt = attempt +
1,
- next_backoff, refresh_started_at] {
- if (auto self = weak_self.lock()) {
- self->DoRefreshAttempt(next_attempt, next_backoff,
refresh_started_at);
- }
- });
- scheduled_task_id_.store(retry_id);
+ auto delay = CalculateRefreshDelay();
+ if (delay.has_value() && *delay <= std::chrono::milliseconds::zero()) {
+ return TokenExpired("Refreshed OAuth2 token is already expired");
+ }
+ return delay;
+ } catch (const std::exception& e) {
+ return UnknownError("OAuth2 token refresh threw: {}", e.what());
+ } catch (...) {
+ return UnknownError("OAuth2 token refresh threw a non-standard
exception");
}
}
- void ScheduleRefresh() {
- if (!config_.keep_refreshed || closed_.load()) return;
- auto delay = CalculateRefreshDelay();
- if (delay < std::chrono::milliseconds::zero()) return;
-
- std::weak_ptr<OAuth2Session> weak_self = shared_from_this();
- auto new_id = TokenRefreshScheduler::Instance().Schedule(
- delay, [weak_self = std::move(weak_self)] {
- if (auto self = weak_self.lock()) self->DoRefresh();
- });
- scheduled_task_id_.store(new_id);
+ void ScheduleRefresh(std::chrono::milliseconds delay) {
+ ExecutorTask refresh([weak_self = weak_from_this()] {
+ if (auto self = weak_self.lock()) {
+ if (auto next_delay = self->Refresh()) {
+ self->ScheduleRefresh(*next_delay);
+ }
+ }
+ });
+ ::iceberg::internal::TaskSubmissionCallback on_submission([](Status
status) {
Review Comment:
Question on rejected submissions: if `Executor::Submit` rejects the refresh
task (e.g. queue full), `on_submission` only logs a warning. Since the next
refresh is only scheduled from inside the task, and `Authenticate()` doesn't
refresh on demand, a single rejection seems to stop background refresh
permanently, and requests start failing once the token expires.
I see an earlier revision retried with a bounded backoff (200ms–10s). Was
that removed intentionally?
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