Document does not exist while saving from subscription

[georgiosd]

This is an odd one!

The id referenced is the document being processed.

Raven.Client.Exceptions.ConcurrencyException: Document EmailCommands/900-A does not exist, but Put was called with change vector: C:1851-DXDNkDrW40CpbofADiHi0Q, A:1861-MSs89TxVxU6zkjnE9vVlGQ, B:2-Oi6b7yhUp0iboDFSWb4zIA, C:2-RowqUkv6VkueqOtN5+uQRg, RAFT:13-ctLUwHVpr0+h5ZMDAjL4eA, A:3-gpq8s0SsBUCu0x07QEfe/A, B:1857-uzHLQoMefEmZPwI7Hnm1gw. Optimistic concurrency violation, transaction will be aborted.
  File "C:\Builds\RavenDB-Stable-5.3\53016\src\Raven.Client\Exceptions\ExceptionDispatcher.cs", line 179, col 13, in void ExceptionDispatcher.ThrowConflict(ExceptionSchema schema, BlittableJsonReaderObject json)
  File "C:\Builds\RavenDB-Stable-5.3\53016\src\Raven.Client\Exceptions\ExceptionDispatcher.cs", line 78, col 21, in async Task ExceptionDispatcher.Throw(JsonOperationContext context, HttpResponseMessage response, Action<StringBuilder> additionalErrorInfo)
  File "C:\Builds\RavenDB-Stable-5.3\53016\src\Raven.Client\Http\RequestExecutor.cs", line 1425, col 21, in async Task<bool> RequestExecutor.HandleUnsuccessfulResponse<TResult>(ServerNode chosenNode, int? nodeIndex, JsonOperationContext context, RavenCommand<TResult> command, HttpRequestMessage request, HttpResponseMessage response, string url, SessionInfo se...
  File "C:\Builds\RavenDB-Stable-5.3\53016\src\Raven.Client\Http\RequestExecutor.cs", line 903, col 9, in async Task RequestExecutor.ExecuteAsync<TResult>(ServerNode chosenNode, int? nodeIndex, JsonOperationContext context, RavenCommand<TResult> command, bool shouldRetry, SessionInfo sessionInfo, CancellationToken token) x 2
  File "C:\Builds\RavenDB-Stable-5.3\53016\src\Raven.Client\Documents\Session\AsyncDocumentSession.cs", line 164, col 21, in async Task AsyncDocumentSession.SaveChangesAsync(CancellationToken token)
  File "/home/runner/work/necca/necca/Necca.Common/Commands/EmailCommandProcessor.cs", line 49, col 9, in async Task EmailCommandProcessor.ProcessAsync(EmailUserOrderCompletedCommand command, IAsyncDocumentSession session)
  ?, in async Task CommandProcessingService<TProcessor, TCommand>.ProcessBatchAsync(object processor, SubscriptionBatch<TCommand> batch, IServiceProvider serviceProvider)
  ?, in async Task CommandProcessingServiceBase<TProcessor, TCommand>.ProcessBatchAsync(object processor, SubscriptionBatch<TCommand> batch) x 2

Any idea what caused it and how to handle it?

[ayende]

Between sending the batch of documents to the subscription and the actual processing, that document was deleted.
The mechanics of how that happened depends a lot on your actual code / usage.

[georgiosd]

There is no code in the app that deletes these commands and I can still find it in studio, so I'm not sure I can support that hypothesis.

Any other ideas?

[ayende]

Someone doing that manually?
Is this something that you can reproduce?
You can use the traffic watch to monitor activities and see what is going on.

[ayende]

Also see my comment on the other issue on store.OpenSession() vs. batch.OpenSession()

[georgiosd]

This only happened once so sadly no repro. I have converted all my code to use batch sessions vs opening a new one from the store.