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https://issues.apache.org/jira/browse/KAFKA-7510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16655830#comment-16655830
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Ewen Cheslack-Postava commented on KAFKA-7510:
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[~mjsax] We should be consistent. Do not log the data. If it is acceptable at
any level, it would only be acceptable at TRACE.
> KStreams RecordCollectorImpl leaks data to logs on error
> --------------------------------------------------------
>
> Key: KAFKA-7510
> URL: https://issues.apache.org/jira/browse/KAFKA-7510
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Mr Kafka
> Priority: Major
> Labels: user-experience
>
> org.apache.kafka.streams.processor.internals.RecordCollectorImpl leaks data
> on error as it dumps the *value* / message payload to the logs.
> This is problematic as it may contain personally identifiable information
> (pii) or other secret information to plain text log files which can then be
> propagated to other log systems i.e Splunk.
> I suggest the *key*, and *value* fields be moved to debug level as it is
> useful for some people while error level contains the *errorMessage,
> timestamp, topic* and *stackTrace*.
> {code:java}
> private <K, V> void recordSendError(
> final K key,
> final V value,
> final Long timestamp,
> final String topic,
> final Exception exception
> ) {
> String errorLogMessage = LOG_MESSAGE;
> String errorMessage = EXCEPTION_MESSAGE;
> if (exception instanceof RetriableException) {
> errorLogMessage += PARAMETER_HINT;
> errorMessage += PARAMETER_HINT;
> }
> log.error(errorLogMessage, key, value, timestamp, topic,
> exception.toString());
> sendException = new StreamsException(
> String.format(
> errorMessage,
> logPrefix,
> "an error caught",
> key,
> value,
> timestamp,
> topic,
> exception.toString()
> ),
> exception);
> }{code}
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