topic Re: Autoloader directory listing not listing all files in Data Engineering

Autoloader directory listing not listing all files

FabriceDeseyn — Wed, 29 Mar 2023 12:14:42 GMT

Hi community

I have an Autoloader pipeline running with following configuration. Unfortunately, it does not detect all files. (see below query definition).

The folder that needs to be read has 38.246 files that all have the same schema and structure.:

If I look at the `cloud_files_state`, I see get 4999 files. Do I do something wrong? Is this an 'initial' count that will be increased if these files are ingested?

Re: Autoloader directory listing not listing all files

daniel_sahal — Wed, 29 Mar 2023 12:47:04 GMT

@Fabrice Deseyn

It looks like your storage is not prepared for incremental listing. Use normal Directory Listing to get all of the files.

https://docs.databricks.com/ingestion/auto-loader/directory-listing-mode.html#date-partitioned-files

Re: Autoloader directory listing not listing all files

FabriceDeseyn — Wed, 29 Mar 2023 13:19:20 GMT

@Daniel Sahal

Thanks, apparently I looked over the useIncrementalListing setting... big mistake from my side...

Thanks for the second pair of eyes!

Re: Autoloader directory listing not listing all files

FabriceDeseyn — Wed, 29 Mar 2023 13:45:50 GMT

So, I changed the code (also tried with False) and have put a new checkpoint. This however still keeps giving me the same amount of files.

Re: Autoloader directory listing not listing all files

Lakshay — Wed, 29 Mar 2023 17:42:54 GMT

Hi @Fabrice Deseyn , My understanding is that this could be because Autoloader returns a fixed no. of results per API call as explained here: https://docs.databricks.com/ingestion/auto-loader/directory-listing-mode.html#how-does-directory-listing-mode-work

Re: Autoloader directory listing not listing all files

Anonymous — Thu, 30 Mar 2023 07:39:12 GMT

Hi @Fabrice Deseyn

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