Hi,
No great drama but we got 52k of these errors in the logs between midnight & 4am while a projection was being deleted:
[PID:02440:017 2019.09.23 00:00:02.239 ERROR QueuedHandlerMRES ] Error while processing message EventStore.Projections.Core.Messages.ReaderSubscriptionMessage+EventReaderPartitionDeleted in queued handler ‘Projection Core #2’.
System.InvalidOperationException: Cannot make a checkpoint tag at earlier position. ‘C:159345452414/P:159345452414’ < ‘C:159345456917/P:159345456917’
at EventStore.Projections.Core.Services.Processing.EventByTypeIndexPositionTagger.MakeCheckpointTag(CheckpointTag previous, EventReaderPartitionDeleted partitionDeleted) in C:\projects\eventstore\src\EventStore.Projections.Core\Services\Processing\EventByTypeIndexPositionTagger.cs:line 75
at EventStore.Projections.Core.Services.Processing.ReaderSubscription.Handle(EventReaderPartitionDeleted message) in C:\projects\eventstore\src\EventStore.Projections.Core\Services\Processing\ReaderSubscription.cs:line 51
at EventStore.Projections.Core.Services.Processing.HeadingEventReader.DistributeMessage(EventReaderPartitionDeleted message) in C:\projects\eventstore\src\EventStore.Projections.Core\Services\Processing\HeadingEventReader.cs:line 242
at EventStore.Projections.Core.Services.Processing.HeadingEventReader.Handle(EventReaderPartitionDeleted message) in C:\projects\eventstore\src\EventStore.Projections.Core\Services\Processing\HeadingEventReader.cs:line 115
at EventStore.Projections.Core.Services.Processing.EventReaderCoreService.Handle(EventReaderPartitionDeleted message) in C:\projects\eventstore\src\EventStore.Projections.Core\Services\Processing\EventReaderCoreService.cs:line 227
at EventStore.Core.Bus.MessageHandler`1.TryHandle(Message message) in C:\projects\eventstore\src\EventStore.Core\Bus\MessageHandler.cs:line 33
at EventStore.Core.Bus.InMemoryBus.Publish(Message message) in C:\projects\eventstore\src\EventStore.Core\Bus\InMemoryBus.cs:line 324
at EventStore.Core.Bus.QueuedHandlerMRES.ReadFromQueue(Object o) in C:\projects\eventstore\src\EventStore.Core\Bus\QueuedHandlerMRES.cs:line 122
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We’re on v4.1.1 in a 3 node cluster. We’re planning to upgrade to v5 in the not too distant future.
Cheers,
Jason