{"action":"created","issue":{"url":"https://api.github.com/repos/EventStore/EventStore/issues/753","labels_url":"https://api.github.com/repos/EventStore/EventStore/issues/753/labels{/name}","comments_url":"https://api.github.com/repos/EventStore/EventStore/issues/753/comments","events_url":"https://api.github.com/repos/EventStore/EventStore/issues/753/events","html_url":"https://github.com/EventStore/EventStore/issues/753","id":116580718,"number":753,"title":"exception in `ReaderSubscriptionManagement`","user":{"login":"ahjohannessen","id":153607,"avatar_url":"https://avatars.githubusercontent.com/u/153607?v=3","gravatar_id":"","url":"https://api.github.com/users/ahjohannessen","html_url":"https://github.com/ahjohannessen","followers_url":"https://api.github.com/users/ahjohannessen/followers","following_url":"https://api.github.com/users/ahjohannessen/following{/other_user}","gists_url":"https://api.github.com/users/ahjohannessen/gists{/gist_id}","starred_url":"https://api.github.com/users/ahjohannessen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ahjohannessen/subscriptions","organizations_url":"https://api.github.com/users/ahjohannessen/orgs","repos_url":"https://api.github.com/users/ahjohannessen/repos","events_url":"https://api.github.com/users/ahjohannessen/events{/privacy}","received_events_url":"https://api.github.com/users/ahjohannessen/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2015-11-12T16:05:57Z","updated_at":"2015-11-12T16:16:32Z","closed_at":null,"body":"So we woke up to a 3-way cluster, with `by_category` enabled, having one of the nodes output the following. So what gives and how critical is this?\r\n```\r\n[PID:00954:030 2015.11.11 12:31:40.395 ERROR QueuedHandlerAutoRes] Error while processing message EventStore.Projections.Core.Messages.ReaderSubscriptionManagement+Unsubscribe in queued handler 'Projection Core #1'.\r\nSystem.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.\r\n  at System.Collections.Generic.Dictionary`2[System.Guid,System.Guid].get_Item (Guid key) [0x00000] in <filename unknown>:0\r\n  at EventStore.Projections.Core.Services.Processing.EventReaderCoreService.Handle (EventStore.Projections.Core.Messages.Unsubscribe message) [0x00000] in <filename unknown>:0\r\n  at EventStore.Core.Bus.MessageHandler`1[EventStore.Projections.Core.Messages.ReaderSubscriptionManagement+Unsubscribe].TryHandle (EventStore.Core.Messaging.Message message) [0x00000] in <filename unknown>:0\r\n  at EventStore.Core.Bus.InMemoryBus.Publish (EventStore.Core.Messaging.Message message) [0x00000] in <filename unknown>:0\r\n  at EventStore.Core.Bus.InMemoryBus.Handle (EventStore.Core.Messaging.Message message) [0x00000] in <filename unknown>:0\r\n  at EventStore.Core.Bus.QueuedHandlerAutoReset.ReadFromQueue (System.Object o) [0x00000] in <filename unknown>:0\r\n```"},"comment":{"url":"https://api.github.com/repos/EventStore/EventStore/issues/comments/156152637","html_url":"https://github.com/EventStore/EventStore/issues/753#issuecomment-156152637","issue_url":"https://api.github.com/repos/EventStore/EventStore/issues/753","id":156152637,"user":{"login":"ahjohannessen","id":153607,"avatar_url":"https://avatars.githubusercontent.com/u/153607?v=3","gravatar_id":"","url":"https://api.github.com/users/ahjohannessen","html_url":"https://github.com/ahjohannessen","followers_url":"https://api.github.com/users/ahjohannessen/followers","following_url":"https://api.github.com/users/ahjohannessen/following{/other_user}","gists_url":"https://api.github.com/users/ahjohannessen/gists{/gist_id}","starred_url":"https://api.github.com/users/ahjohannessen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ahjohannessen/subscriptions","organizations_url":"https://api.github.com/users/ahjohannessen/orgs","repos_url":"https://api.github.com/users/ahjohannessen/repos","events_url":"https://api.github.com/users/ahjohannessen/events{/privacy}","received_events_url":"https://api.github.com/users/ahjohannessen/received_events","type":"User","site_admin":false},"created_at":"2015-11-12T16:16:32Z","updated_at":"2015-11-12T16:16:32Z","body":"I am feeling a bit uneasy if projections like `$by_category` stop for no good reason :/ Because those are the cornerstone of our application setup wrt \"reactors\" and read model.\r\n\r\nGreg, what could be a reason for `$by_category` entering into a faulted state in an otherwise healthy ubuntu node setup with each node given 4 CPUs and 8 GB RAM with 100GB of disk (using perhaps 1GB of that)?"}}