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https://issues.apache.org/jira/browse/TIKA-3771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17540132#comment-17540132
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Luís Filipe Nassif commented on TIKA-3771:
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Hi [~nick], decreasing the priority of that block seems a good idea, but it may
have side effects... I asked to TIKA-3687 reporter if he really needs \nX-
0:1024 match, if not, maybe we could remove it?
> Regression from TIKA-3687: Files wrongly detected as EML
> ---------------------------------------------------------
>
> Key: TIKA-3771
> URL: https://issues.apache.org/jira/browse/TIKA-3771
> Project: Tika
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Luís Filipe Nassif
> Priority: Major
> Attachments: BEA498353ECFA1C440365BB434BBC228269917D7.png
>
>
> Running regression tests in the process of upgrading to Tika-2.4.0 from 1.x,
> I detected some hundreds of samples from 1M of different file types now are
> being detected as EML. This is caused by the <match value="\nX-"
> type="string" offset="0:1024"/> rule added in TIKA-3687 in the
> minShouldMatch="2" clause. Attached is a sample PNG file that triggers this
> (it also has another \nDate: value in the first 1024 bytes).
> Another not related thing, I tried to override the message/rfc822 mime
> definition with a custom-tika-mimetypes.xml in classpath, but it had no
> effect, it used to work in Tika-1.x. Was that change intentional? I think
> user definitions should take precedence over Tika definitions, since they can
> change depending on domain or context (e.g. the same extension may be used by
> different applications). If it wasn't intentional, I'll open other issue.
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