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https://issues.apache.org/jira/browse/LUCENE-5842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14071862#comment-14071862
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ASF subversion and git services commented on LUCENE-5842:
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Commit 1612852 from [~rcmuir] in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1612852 ]
LUCENE-5842: Validate checksum footers for postings
lists/docvalues/storedfields/vectors on init
> Validate checksum footers for postings lists, docvalues, storedfields,
> termvectors on init
> ------------------------------------------------------------------------------------------
>
> Key: LUCENE-5842
> URL: https://issues.apache.org/jira/browse/LUCENE-5842
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Fix For: 5.0, 4.10
>
> Attachments: LUCENE-5842.patch, LUCENE-5842.patch
>
>
> For small files (e.g. where we read in all the bytes anyway), we currently
> validate the checksum on reader init.
> But for larger files like .doc/.frq/.pos/.dvd/.fdt/.tvd we currently do
> nothing at all on init, as it would be too expensive.
> We should at least do this:
> {code}
> // NOTE: data file is too costly to verify checksum against all the bytes on
> // open, but for now we at least verify proper structure of the checksum
> // footer: which looks for FOOTER_MAGIC + algorithmID. This is cheap
> // and can detect some forms of corruption such as file truncation.
> CodecUtil.retrieveChecksum(data);
> {code}
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