This is an extension of KB0831878.
With Orlando patch 4 or later, you may face the following error when importing data:
file:/glide/nodes/<some_node>/bin/../tmp/somefile.txt For security reasons, the extension is not supported; not attaching: file:/glide/nodes/<some_node>/bin/../tmp/somefile.txt
You read KB0831878, and checked the value for the property "glide.import.file.extension_blacklist". You noticed that .txt is NOT in this property.
There seems to be no point in adding .txt in the suggested property "glide.import.file.extension_whitelist" and the KB seems irrelevant.
Although the extension is not explicitly listed in the blacklist, you can still force it in the "glide.import.file.extension_whitelist" property. This will solve this issue.