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From Andrew Otto <o...@wikimedia.org>
Subject log.message.timestamp.difference.max.ms and future timestamps?
Date Thu, 16 Apr 2020 16:39:39 GMT
log.message.timestamp.difference.max.ms is the "The maximum difference
allowed between the timestamp when a broker receives a message and the
timestamp specified in the message.".

What happens if the message timestamp is in the future?  We just
encountered a problem where a producer set a timestamp a year in the
future, which is keeping log segments with that message to not be deleted,
causing disks to fill.  I'd like to reject messages with timestamps (too
far) in the future.  Based on the way the docs are worded, I'd assume the
difference will be negative in this case.

  log.message.timestamp.difference.max.ms - futureTimestamp == -bigNumber

Will the message be rejected or accepted in this case?

Thanks!
-Andrew Otto
 @Wikimedia Foundation

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