[jira] [Commented] (NIFI-8020) TailFile can leave FileChannel open when handling NUL characters

["ASF subversion and git services (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/NIFI-8020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17234087#comment-17234087 ] 

ASF subversion and git services commented on NIFI-8020:
-------------------------------------------------------

Commit 4aaec5aa3878f1abd3c2b98ba7659431f0a8c9c3 in nifi's branch refs/heads/main from Tamas Palfy
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=4aaec5a ]

NIFI-8020 Make sure TailFile doesn't leave FileChannel open when handling NUL characters

Signed-off-by: Pierre Villard <pi...@gmail.com>

This closes #4671.


> TailFile can leave FileChannel open when handling NUL characters
> ----------------------------------------------------------------
>
>                 Key: NIFI-8020
>                 URL: https://issues.apache.org/jira/browse/NIFI-8020
>             Project: Apache NiFi
>          Issue Type: Bug
>            Reporter: Tamas Palfy
>            Assignee: Tamas Palfy
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In TailFile when REREAD_ON_NUL is set to 'true' and a NUL character is encountered, the processor aborts all processing and yields to try again later.
> However the opened FileChannel is not stored in the states. Because of this the reader is not cleaned up later.
> On Windows this prevents from deleting the tailed file. (On linux it seems the file still can be deleted. Leaving open the FileChannel is not good nonetheless.)
> Fix: Store the reader in the states.



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