Issue #7250 : Document that UNC paths are not reliably supported - #7909
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hansva merged 1 commit intoAug 12, 2026
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vfs.adoc claimed the opposite of the actual behaviour: UNC names are supported under Windows. That sentence describes Apache VFS, which the surrounding table is taken from, not Hop. On apache#7250 a user lost time to an Excel Input transform that could not open a UNC path while another transform read the same file, and hansva confirmed UNC paths are not supported in Hop -- they work in some cases and mostly do not -- and asked for it to be documented. Corrects the sentence, and adds a Windows UNC paths section giving the reason the behaviour looks inconsistent (different transforms reach the file system by different routes), a warning against relying on it unattended, and the mounted-drive workaround hansva recommended, with a variable example so the same pipeline runs on Windows and Linux.
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thansk @vbhanuchander-lang |
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Closes #7250
@hansva you asked on that issue for this to be documented ("I don't think it is properly documented, let's keep this ticket to do that"). While writing it I found the docs were not silent on UNC — they claimed the opposite:
Where `absolute-path` is a valid absolute file name for the local platform. UNC names are supported under Windows.That sentence is accurate about Apache VFS, which the surrounding table is taken from ("The table below lists the file system types provided by the default Apache VFS implementation"), but not about Hop. So a user following the docs had every reason to expect
\\some.network.folder\my_excel.xlsxto work, which is how #7250 happened.Two changes:
1. Correct the claim rather than leave a true-of-upstream statement that misleads in context, pointing at the new section instead.
2. Add a
Windows UNC pathssection covering what the issue actually revealed:Docs only, no code. Cross-reference uses the
<<id, Text>>form to match the rest of the manual, and**bold**as used elsewhere in these pages.If you would rather this were phrased as a flat "not supported" with no explanation of the inconsistency, say so and I will trim it — I erred toward explaining the failure mode because that is what the reporter was missing.