File.exists() return 'false' for existing file on Samba share network folder

Question

I know for sure that the file exists on Samba share. But file.exists() return 'false' for it. Another system puts this file in a Samba share folder and notifies our application that the file is uploaded. Than we invoke file.exists() for check this and get 'false'

Path sourceFile = ... 
sourceFile.toFile().exists() 
//return 'false' for existing file with path like \\share1\mc\logs.txt

Maybe the file has not yet been completely written or has not been completely closed, could that affect the result file.exists()?

Just for clarification: are you using the package `java.io` or `java.nio.file`? — Volker Stolz, Sep 03 '19 at 08:50
@ShiDoiSi I may be missing a subtility of your question, but there's no `java.io.Path`, only `java.nio.file.Path` — Aaron, Sep 03 '19 at 08:53
can you print out the path and post it and the result of `sourceFile.toFile()`? Shown code is working fine for me — user85421, Sep 03 '19 at 08:57
@aaron You're right, I only looked at `File`. Must be NIO then. — Volker Stolz, Sep 03 '19 at 08:58
@ShiDoiSi NIO only to represent Path and get `File`; the real work is done by `java.io.File#exists` — user85421, Sep 03 '19 at 08:59

score 1 · Answer 1 · edited Sep 03 '19 at 10:05

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Well, at least the behaviour you're observing is covered by the documentation

false if the file does not exist or its existence cannot be determined

(emphasis added).

Might be related to this question here: Why does 'File.exists' return true, even though 'Files.exists' in the NIO 'Files' class returns false, though the answers seem a bit inconclusive to me.

edited Sep 03 '19 at 10:05

Dor

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answered Sep 03 '19 at 09:07

Volker Stolz

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Here used File.exists() method, not Files.exists(...), but thanks for link! – Sorand Sep 03 '19 at 09:29

File.exists() return 'false' for existing file on Samba share network folder

1 Answers1