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From "Livia Sarbu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (COMPRESS-252) Writing 7z empty entries with LZMA2 produces incorrect or corrupt archive
Date Wed, 18 Dec 2013 16:32:06 GMT

     [ https://issues.apache.org/jira/browse/COMPRESS-252?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Livia Sarbu updated COMPRESS-252:
---------------------------------

    Attachment: EmptyTest.zip

One of the folder used for tests, zipped.

> Writing 7z empty entries with LZMA2 produces incorrect or corrupt archive
> -------------------------------------------------------------------------
>
>                 Key: COMPRESS-252
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-252
>             Project: Commons Compress
>          Issue Type: Bug
>          Components: Archivers
>    Affects Versions: 1.6
>         Environment: eclipse 3.7.2, java 1.7
>            Reporter: Livia Sarbu
>            Priority: Blocker
>         Attachments: CreateArchiveTest.java, EmptyTest.zip
>
>
> I couldn't find an exact rule that causes this incorrect behavior, but I tried to reduce
it to some simple scenarios to reproduce it:
> Input: A folder with certain files -> tried to archive it.
> If the folder contains more than 7 files the incorrect behavior appears.
> Scenario 1: 7 empty files
> Result: The created archive contains a single folder entry with the name of the archive
(no matter which was the name of the file)
> Scenario 2: 7 files, some empty, some with content
> Result: The created archive contains a folder entry with the name of the archive and
a number of file entries also with the name of the archive. The number of the entries is equal
to the number of non empty files.
> Scenario 3: 8 empty files
> Result: 7zip Manager cannot open archive and stops working.
> Scanario 4.1: 8 files: some empty, some with content, last file (alphabetically) with
content
> Result: same behavior as described for Scenario 2.
> Scanario 4.2: 8 files, some empty, some with content, last file empy
> Result: archive is corrupt, the following message is received: "Cannot open file 'archivename.7z'
as archive" (7Zip Manager does not crash).



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