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Fix connection timeout when retries are set to none #1650

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Fix connection timeout when retries are set to none #1650

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d9f0db4
use timeout value from the connection backoff directly instead of the…
tfeickjc Sep 20, 2023
7e97e1b
revert previous changes to use timeout value from the connection back…
afeick Oct 4, 2023
349ddd7
return the last element of the connection backoff iterator without a …
afeick Oct 4, 2023
3f39bec
test fixes
afeick Oct 4, 2023
03d23a6
Merge branch 'main' into fix-connection-retry-timeout
afeick Oct 4, 2023
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13 changes: 9 additions & 4 deletions Sources/GRPC/ConnectionBackoff.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ public struct ConnectionBackoff: Sequence, Sendable {

/// An iterator for ``ConnectionBackoff``.
public class ConnectionBackoffIterator: IteratorProtocol {
public typealias Element = (timeout: TimeInterval, backoff: TimeInterval)
public typealias Element = (timeout: TimeInterval, backoff: TimeInterval?)

/// Creates a new connection backoff iterator with the given configuration.
public init(connectionBackoff: ConnectionBackoff) {
Expand Down Expand Up @@ -135,7 +135,12 @@ public class ConnectionBackoffIterator: IteratorProtocol {
case let .limited(limit) where limit > 0:
self.connectionBackoff.retries.limit = .limited(limit - 1)

// limit must be <= 0, no new element.
// limit is reached, return an element with only a timeout.
case let .limited(limit) where limit == 0:
self.connectionBackoff.retries.limit = .limited(limit - 1)
return self.makeElement(backoff: nil)
Comment on lines +138 to +141
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@afeick afeick Oct 4, 2023 •
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@glbrntt What do you think about using a nil Element.backoff as the sentinel for the iterator?

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It changes the Element type which is an API breaking change so we can't do it unfortunately. Otherwise it'd be a good solution.


// limit must be < 0, no new element.
case .limited:
return nil
}
Expand All @@ -159,8 +164,8 @@ public class ConnectionBackoffIterator: IteratorProtocol {

/// Make a timeout-backoff pair from the given backoff. The timeout is the `max` of the backoff
/// and `connectionBackoff.minimumConnectionTimeout`.
private func makeElement(backoff: TimeInterval) -> Element {
let timeout = max(backoff, self.connectionBackoff.minimumConnectionTimeout)
private func makeElement(backoff: TimeInterval?) -> Element {
let timeout = max(backoff ?? self.unjitteredBackoff, self.connectionBackoff.minimumConnectionTimeout)
return (timeout, backoff)
}

Expand Down
5 changes: 4 additions & 1 deletion Sources/GRPC/ConnectionManager.swift
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Expand Up @@ -997,7 +997,10 @@ extension ConnectionManager {
}

// Should we reconnect if the candidate channel fails?
let reconnect: Reconnect = timeoutAndBackoff.map { .after($0.backoff) } ?? .none
var reconnect = Reconnect.none
if let backoff = timeoutAndBackoff?.backoff {
reconnect = Reconnect.after(backoff)
}
let connecting = ConnectingState(
backoffIterator: backoffIterator,
reconnect: reconnect,
Expand Down