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https://issues.apache.org/jira/browse/IGNITE-7264?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16303297#comment-16303297
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Stanislav Lukyanov commented on IGNITE-7264:
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As said in the description, the root cause is that certain cache names are not
compatible with persistence because there is no way to create a file (a
directory) of that name. Slash leads to multiple directories being created,
some other symbols ('\0' on Unix, '<', '*' and other on Windows) just can't be
used, etc.
One way to handle that would be to check the name via `j.n.f.Paths.get()`
(check that the name is accepted on this platform and that it is a simple
name). However, I suspect that it might create more problems with portability
accross different file systems and encodings (say, a cache name "my::cache" is
valid on Unix but not on Windows).
Another way would be to disallow a large number of symbols/names on all
platforms - that requires finding this set and, possibly, widening it later.
Finally, instead of disallowing a set of characters, it could be
escaped/replaced in the file names (and left untouched in the cache names). For
instance, replace all non-alphanumeric characters in a cache name with
underscore, so that cache "foo/bar**foobar" has a persistence folder of name
"cache-foo_bar__foobar".
> Caches with forward slash "/" in names cause problems for PDS
> -------------------------------------------------------------
>
> Key: IGNITE-7264
> URL: https://issues.apache.org/jira/browse/IGNITE-7264
> Project: Ignite
> Issue Type: Bug
> Components: cache, persistence
> Affects Versions: 2.3
> Reporter: Ilya Kasnacheev
> Assignee: Stanislav Lukyanov
>
> If I am to create cache with name "caches/1", there's no immediate error, but
> nodes fail when trying to rejoin topology with storage already initialized.
> I think there should be an immediate exception in case persistence is enabled
> for such case.
> Moreover, I suggest first trying to create directory, then making sure it was
> created and that dir.parent == expected parent directory. Because on Windows
> there are more restrictions on FS file names, etc...
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