Documents are consistently processed twice from consumption directory

[KingOfDog]

My Paperless setup includes a WebDAV directory which is mapped onto the consume directory of Paperless. That way I can easily upload files from my PC to the server.

However, Paperless tries to process the same document multiple times. First, it fails with File type not supported. I assume this is because the document has not yet finished uploading. Though this is not nice, I can live with it.

Then, Paperless starts processing the document for real – only it processes the same document twice. Probably this is because I have two workers for processing. As soon as the first one finishes, the second one can't add the document anymore as it already exists in the database (with the error [Errno 2] No such file or directory: [path to file...]). Then Paperless tries to process the already finished document again (also twice) even though it has already been deleted from the consume directory in the previous task and fails with File not found.

All of this throttles the speed at which my server could process documents severely. Is this a configuration issue on my side or a bug in Paperless? I couldn't find anything about this problem so far.

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My setup is based on Docker Compose. For the WebDAV server I use Dave.
I haven't changed any options concerning the consumption except for PAPERLESS_CONSUMER_RECURSIVE, however I tried out resetting it to false and the issue persists.

[mimek]

Can you try to set polling of consume directory with environment variable: PAPERLESS_CONSUMER_POLLING= ? I'm having similar behaviour on Synology shared folder, and this setting seems to be helpful. I'm even getting 3 errors regarding one file processing without this polling setting.