[jira] [Resolved] (COMPRESS-497) Handle missing offset to end header in 7z

["Stefan Bodewig (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/COMPRESS-497?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stefan Bodewig resolved COMPRESS-497.
-------------------------------------
    Fix Version/s: 1.20
       Resolution: Fixed

Merged your PR, many thanks!

> Handle missing offset to end header in 7z
> -----------------------------------------
>
>                 Key: COMPRESS-497
>                 URL: https://issues.apache.org/jira/browse/COMPRESS-497
>             Project: Commons Compress
>          Issue Type: Improvement
>          Components: Archivers
>            Reporter: Stefan Schlott
>            Priority: Major
>             Fix For: 1.20
>
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> When dealing with multipart 7z files, it may occur that the start header is invalid (all zeros) - see [https://www.7-zip.org/recover.html], section "There is no correct End Header at the end of archive". This can happen if the first part of the file is moved while the overall operation hasn't finished yet (the start header is written as very last step).
> Detect a missing start header (all bytes are zero) and try to guess the end header.



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