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https://issues.apache.org/jira/browse/COMPRESS-492?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16917019#comment-16917019
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Bernhard Geisberger commented on COMPRESS-492:
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I do not have any information about the original source of the file. In our
company, we process a lot of spam mails and the problem occurred in an advanced
stage of the processing workflow, where I don't have any information about the
source. But since the file does not seem to contain any information (it looks
like there really is just a simple 7zip header inside), I think it should be no
problem.
> NullPointerException for 7zip files without file headers
> --------------------------------------------------------
>
> Key: COMPRESS-492
> URL: https://issues.apache.org/jira/browse/COMPRESS-492
> Project: Commons Compress
> Issue Type: Bug
> Components: Archivers
> Affects Versions: 1.18
> Reporter: Bernhard Geisberger
> Priority: Minor
> Labels: 7zip, nullpointerexception
> Fix For: 1.20
>
> Attachments: sample.7z
>
>
> When loading a .7z file with correct headers and without files info headers
> using the SevenZFile class, a NullPointerException is thrown when calling
> getEntries or getNextEntry, because the archive.files member of SevenZFile is
> null. Ideally, a subclass of IOException should be thrown in this case.
> I attached an example file we encountered in our file processing pipeline,
> which causes the exception.
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