[NUTCH-1957] FileDumper output file name collisions

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.10
• Fix Version/s: 1.10
• Component/s: tool
• Labels: dumper filename tools
• Patch Info: Patch Available
• Assignee: Chris A. Mattmann
• Reporter: Renxia Wang
• Created: 11/Mar/15 07:04
• Updated: 13/Mar/24 14:51
• Resolved: 15/Mar/15 04:25

Description

The FileDumper extracts file base name and extension and use <basename>.<extension>(e.g. given the url https://www.aoncadis.org/contact/Yarrow%20Axford/project.html, the <basename>.<extension> will be project.html) as the file name to dump the file.

Code from FileDumper.java:

String url = key.toString();
String baseName = FilenameUtils.getBaseName(url);
String extension = FilenameUtils.getExtension(url);
...
String filename = baseName + "." + extension;

This introduce file name collision and leads to loss of data when using bin/nutch dump.

Sample logs:
2015-03-10 23:38:01,192 INFO tools.FileDumper - Dumping URL: http://beringsea.eol.ucar.edu/data/
2015-03-10 23:38:01,193 INFO tools.FileDumper - Skipping writing: [testFileName/.html]: file already exists
2015-03-10 23:38:16,717 INFO tools.FileDumper - Dumping URL: http://catalog.eol.ucar.edu/
2015-03-10 23:38:16,719 INFO tools.FileDumper - Skipping writing: [testFileName/.html]: file already exists

2015-03-10 23:38:46,411 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Carin%20Ashjian/project.html
2015-03-10 23:38:46,411 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,411 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Christopher%20Arp/project.html
2015-03-10 23:38:46,411 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,411 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Dr.%20Knut%20Aagaard/project.html
2015-03-10 23:38:46,412 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,412 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Eric%20C.%20Apel/project.html
2015-03-10 23:38:46,412 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,412 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/John%20T.%20Andrews/project.html
2015-03-10 23:38:46,412 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,412 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Juha%20Alatalo/project.html
2015-03-10 23:38:46,413 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,413 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Kerim%20Aydin/project.html
2015-03-10 23:38:46,413 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,413 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Knut%20Aagaard/project.html
2015-03-10 23:38:46,413 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,413 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Mary%20Albert/project.html
2015-03-10 23:38:46,414 INFO tools.FileDumper - Skipping writing: [testFileName/project.html]: file already exists
2015-03-10 23:38:46,414 INFO tools.FileDumper - Dumping URL: https://www.aoncadis.org/contact/Yarrow%20Axford/project.html