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https://issues.apache.org/jira/browse/NIFI-7950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Pierre Villard resolved NIFI-7950.
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Resolution: Feedback Received
Apache NiFi 1.x is no longer maintained and no new release is planned on the
1.x release line. Marking as resolved as part of a cleanup operation. Please
open a new one with an updated description if this is still relevant for NiFi
2.x.
> TailFile processor in Multiple files mode cannot work on Windows.
> -----------------------------------------------------------------
>
> Key: NIFI-7950
> URL: https://issues.apache.org/jira/browse/NIFI-7950
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.11.4, 1.12.1
> Environment: Windows
> Reporter: Francçois-Xavier HENG
> Priority: Major
> Labels: easyfix
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> On windows TailFile can not work for "Tailing mode" = Multiple files.
> I'm not good enough with apache lib to correct this alone but here is the
> faulty part:
> In
> nifi/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/TailFile.java,
> line 409:
> /**
> * Method to list the files to tail according to the given base directory
> * and using the user-provided regular expression
> * @param baseDir base directory to recursively look into
> * @param fileRegex expression regular used to match files to tail
> * @param isRecursive true if looking for file recursively, false
> otherwise
> * @return List of files to tail
> */
> private List<String> getFilesToTail(final String baseDir, String
> fileRegex, boolean isRecursive, long maxAge) {
> final Collection<File> files = FileUtils.listFiles(new File(baseDir),
> null, isRecursive);
> final List<String> result = new ArrayList<String>();
> final String baseDirNoTrailingSeparator =
> baseDir.endsWith(File.separator) ? baseDir.substring(0, baseDir.length() - 1)
> : baseDir;
> final String fullRegex;
> if (File.separator.equals("/")) {
> // handle unix-style paths
> fullRegex = baseDirNoTrailingSeparator + File.separator +
> fileRegex;
> } else {
> // handle windows-style paths, need to quote backslash characters
> fullRegex = baseDirNoTrailingSeparator +
> Pattern.quote(File.separator) + fileRegex;
> }
> final Pattern p = Pattern.compile(fullRegex);
> On windows the separator is the regexp exape char '\'. The windows path
> cannot be turn in a usable regexp.
> Only workaround is to double slash the windows path after removing last
> trailing '\'.
> Solution maybe to escape all separator in the variable
> baseDirNoTrailingSeparator.
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