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https://issues.apache.org/jira/browse/KAFKA-10574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17212643#comment-17212643
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Chris Egerton commented on KAFKA-10574:
---------------------------------------
Thanks [~rhauch]. Really appreciate the backports; it's a one-in-16-million
chance for this bug to show up but when it does it can be pretty nasty. Nice to
know that those future releases will be safe.
> Infinite loop in SimpleHeaderConverter and Values classes
> ---------------------------------------------------------
>
> Key: KAFKA-10574
> URL: https://issues.apache.org/jira/browse/KAFKA-10574
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 1.1.0, 1.1.1, 1.1.2, 2.0.0, 2.0.1, 2.1.0, 2.2.0, 2.1.1,
> 2.0.2, 2.3.0, 2.2.1, 2.2.2, 2.4.0, 2.3.1, 2.5.0, 2.4.1, 2.6.0, 2.5.1
> Reporter: Chris Egerton
> Assignee: Chris Egerton
> Priority: Major
> Fix For: 2.3.2, 2.4.2, 2.7.0, 2.5.2, 2.6.1
>
>
> A header value with the byte sequence {{0xEF, 0xBF, 0xBF}} will cause an
> infinite loop in the {{Values::parseString}} method. Since that method is
> invoked by the default header converter ({{SimpleHeaderConverter}}), any sink
> record with that byte array will, by default, cause a sink task reading that
> record to stall forever.
> This occurs because that byte sequence, when parsed as a UTF-8 string and
> then read by a
> [StringCharacterIterator|https://docs.oracle.com/javase/8/docs/api/java/text/StringCharacterIterator.html],
> causes the
> [CharacterIterator.DONE|https://docs.oracle.com/javase/8/docs/api/java/text/CharacterIterator.html#DONE]
> character to be returned from
> [StringCharacterIterator::current|https://docs.oracle.com/javase/8/docs/api/java/text/StringCharacterIterator.html#current--],
>
> [StringCharacterIterator::next|https://docs.oracle.com/javase/8/docs/api/java/text/StringCharacterIterator.html#next--],
> etc., and a check for that character is used by the {{Values}} class for its
> parsing logic.
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