Racy Spec: AskTimeoutSpec.TimedOut_ask_should_remove_temp_actor #2449
Description
Picked up in the flaky tests report on TeamCity, for both Mono and Windows:
Number of children in temp container should be 0.
Expected: True
Actual: False
at Akka.Tests.Actor.AskTimeoutSpec+<TimedOut_ask_should_remove_temp_actor>c__async1.MoveNext () <0x41764000 + 0x004eb> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x4176b5b0 + 0x00033> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x417691e0 + 0x00113> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x41769110 + 0x000b3> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x41576350 + 0x00042> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () <0x41576320 + 0x0001a> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x4176b5b0 + 0x00033> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x417691e0 + 0x00113> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x41769110 + 0x000b3> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x41576350 + 0x00042> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () <0x41576320 + 0x0001a> in <filename unknown>:0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () <0x4176b5b0 + 0x00033> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) <0x417691e0 + 0x00113> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) <0x41769110 + 0x000b3> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) <0x41576350 + 0x00042> in <filename unknown>:0
at System.Runtime.CompilerServices.TaskAwaiter.GetResult () <0x41576320 + 0x0001a> in <filename unknown>:0
Based on the error message, it sounds to me like a race condition with the spec itself (i.e. we check the number of children before the last temp actor has had a chance to unregister itself.)