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https://issues.apache.org/jira/browse/TIKA-388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12847509#action_12847509
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Daan de Wit commented on TIKA-388:
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I did not test it, and it might be a premature optimization, but wouldn't it be 
better to check if the stream is already a BufferedInputStream?

> Don't trust streams that claim mark support
> -------------------------------------------
>
>                 Key: TIKA-388
>                 URL: https://issues.apache.org/jira/browse/TIKA-388
>             Project: Tika
>          Issue Type: Improvement
>          Components: parser
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>            Priority: Minor
>             Fix For: 0.7
>
>
> As seen on tika-dev@ and in JCR-2576, there are some InputStream 
> implementations that claim to support the mark feature, but lose the mark as 
> soon as the end of stream has been reached. There's no way for a client to 
> detect such behaviour, so it's probably best for Tika to always use 
> BufferedInputStream to wrap incoming streams when mark support is needed. 
> This may cause one layer of extra buffering, but avoids problems with such 
> broken streams.

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