Matthew Clarke created NIFI-7292:
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Summary: ListFile should apply filters before checking permissions.
Key: NIFI-7292
URL: https://issues.apache.org/jira/browse/NIFI-7292
Project: Apache NiFi
Issue Type: Improvement
Affects Versions: 1.9.2
Reporter: Matthew Clarke
I noticed that NiFi's ListFile processor (and probably other list based
processors) will check permissions on sub-directories before it evaluates the
path filter.
Let's assume we have a mounted directory (/NiFi/mount) that contains sub
directories (A, B, C, D, and private). The NiFi Service user has permissions
to access all directories A,B,C, and D, but not the "private" directory.
I then add a path filter in my ListFile to exclude the "private" directory
(for example: (?!(private)).* )
When I start the ListFile it errors because the NiFi service user does not have
permissions to "private" directory even though I have no intention of listing
anything from that directory. Since it Errors it does not listed files from
any directory including those which have the needed permissions.
If I give the NiFi service user access to that "private" dir then the listing
works ignoring the "private" dir files.
I feel as though the processor should apply the path and/or file filters before
checking permissions?
Users may not have ability to edit permissions on some sub directories. And
with other sub-directories having being dynamically created or having a very
large number of sub-directories, creating a separate ListFile for each
sub-directory is not a desirable solution either.
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