Add missing cluster singleton detection#7363
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Aaronontheweb merged 10 commits intoakkadotnet:devfrom Nov 11, 2024
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gabor-bocso
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Oct 24, 2024
src/contrib/cluster/Akka.Cluster.Tools/Singleton/ClusterSingletonProxy.cs
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src/contrib/cluster/Akka.Cluster.Tools/Singleton/reference.conf
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| Success = 0, | ||
| Timeout = 1, | ||
| } | ||
| public sealed class IdentifySingletonResult : Akka.Actor.INoSerializationVerificationNeeded |
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Should probably make this and the enum private so it doesn't appear in the public API surface
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| # Interval at which the proxy will try to resolve the singleton instance. | ||
| singleton-identification-interval = 1s | ||
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| /// </remarks> | ||
| /// </summary> | ||
| public sealed class ClusterSingletonProxy : ReceiveActor | ||
| public sealed class ClusterSingletonProxy : ReceiveActor, IWithTimers |
| // ignoring the timeout tick message. | ||
| if (_singleton is not null) | ||
| { | ||
| Timers.Cancel(IdentifySingletonTimeOutTick.Instance); |
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I might consider adding a debug message here in case there's an actual bug that lead to this, but that's not a big deal. Good to check for this condition and just turn the timer off and return early though - LGTM
| "ClusterSingletonProxy failed to find an associated singleton named [{0}] in role [{1}] after {2} seconds.", | ||
| _settings.SingletonName, _settings.Role, _settings.SingletonIdentificationFailurePeriod.TotalSeconds); | ||
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| Context.System.EventStream.Publish(IdentifySingletonResult.Timeout( |
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Ah, is this why IdentifySingletonResult is part of the public API? So apps can subscribe to it?
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Yes, I think it is a good addition, people can use this to detect if something went wrong in their application by hooking to this event, instead of having to check their logs
This was referenced Oct 7, 2025
This was referenced Oct 7, 2025
This was referenced Nov 6, 2025
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As per user request, add missing cluster singleton detection to ClusterSingletonProxy to help debug misconfigured singleton setup
Detection timer:
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