Tom-Newton commented on issue #40037:
URL: https://github.com/apache/arrow/issues/40037#issuecomment-1938839390
>> Its possible that a user of the AzureFileSystem might accidentally try to
read or write a directory marker which could cause confusion.
> Can you clarify the sequence that leads to the confusion? I think we
should aim for having no confusion if the user writes to Azure Storage only via
the arrow::FileSystem API and fail-fast on confusion created by other writers.
Imagine the user does this
```
fs->CreateDir("container/directory");
fs->OpenAppendStream("container/directory");
```
Currently on flat namespace this will create the case of file and directory
with the same path. On hierarchical namespace it fails with an un-recoverable
error when the `ObjectAppendStream` gets destructed. This is because the
destructor attempts to `Flush` and subsequently runs into `Azure Error:
[OperationNotSupportedOnDirectory] 400 The requested operation is not supported
on a directory.`
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