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https://issues.apache.org/jira/browse/KAFKA-10685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Russell Sayers updated KAFKA-10685:
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Summary: --to-datetime passed to kafka-consumer-groups interpreting
microseconds wrong (was: --to-datetime passed to kafka-consumer-groups getting
interpreted as a timezone)
> --to-datetime passed to kafka-consumer-groups interpreting microseconds wrong
> -----------------------------------------------------------------------------
>
> Key: KAFKA-10685
> URL: https://issues.apache.org/jira/browse/KAFKA-10685
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Russell Sayers
> Priority: Minor
>
> If you pass more than 3 decimal places for the fractional seconds of the
> datetime, the microseconds get interpreted as milliseconds.
> {{kafka-consumer-groups --bootstrap-server kafka:9092 \}}
> {{ --reset-offsets \}}
> {{ --group webserver-avro \}}
> {{ --topic driver-positions-avro \}}
> {{ --to-datetime "2020-11-05T00:46:48.002237400" \}}
> {{ --dry-run}}
> Relevant code
> [here|https://github.com/apache/kafka/blob/2.7/clients/src/main/java/org/apache/kafka/common/utils/Utils.java#L1304].
> Experimenting with getDateTime:
> * getDateTime("2020-11-05T00:46:48.000") -> 1604537208000
> * getDateTime("2020-11-05T00:46:48.000+0800") -> 1604508408000 - correct the
> formatting string allows for ZZZ timezones
> * getDateTime("2020-11-05T00:46:48.000123") -> 1604537208123 - note this
> ends with 123 milliseconds.
> The pattern string is "yyyy-MM-dd'T'HH:mm:ss.SSS". So SimpleDateFormat
> interprets "000123" as 123 milliseconds. See the stackoverflow answer
> [here|https://stackoverflow.com/a/21235602/109102].
> The fix? Remove any digits after more than 3 characters after the decimal
> point, or raise an exception. The code would still need to allow the RFC822
> timezone, i.e Sign TwoDigitHours Minutes.
>
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