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https://issues.apache.org/jira/browse/OAK-7279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dürig updated OAK-7279:
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Labels: tech-debt (was: )
> segment-tar update from java 7 to java 8 may break persisted names using
> invalid characters
> -------------------------------------------------------------------------------------------
>
> Key: OAK-7279
> URL: https://issues.apache.org/jira/browse/OAK-7279
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: segment-tar
> Reporter: Julian Reschke
> Priority: Minor
> Labels: tech-debt
>
> segment-tar relies on {{String.getBytes()}} when persisting strings such as
> item names.
> The problem is that the behavior for this has been changed in Java 8 with
> respect to invalid strings (here: null characters and unpaired surrogates).
> In Java 7, these would roundtrip, as Java was using the so-called "modified
> UTF-8" encoding (see
> https://docs.oracle.com/javase/6/docs/api/java/io/DataInput.html#modified-utf-8).
> This will produce byte sequence that are *not* valid UTF-8.
> Java 7 will read them back, but Java 8 will map the non-conforming byte
> sequences to the Unicode replacement character. Note that in particular,
> multiple child entries might get identical names as a consequence.
> I'm not sure about the severity of this, and whether something needs to be
> done about it. AFAIC, this is another good reason to reject invalid strings
> as early as possible in the stack.
> cc [~mduerig]
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