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Kafka, mail # dev - topic names again


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Jun Rao 2012-09-25, 16:16
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Jay Kreps 2012-09-25, 16:20
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Joe Stein 2012-09-25, 22:15
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Re: topic names again
Swapnil Ghike 2012-09-26, 00:16
We are patching 0.8 to allow only ASCII alpha-numeric characters, plus _
and - in topic names. Plus the maxTopicNameLength is being hardcoded to
255 chars. The patch is at KAFKA-495.

Thanks,
Swapnil

On 9/25/12 3:15 PM, "Joe Stein" <[EMAIL PROTECTED]> wrote:

>+1 to restrict topic names to ASCII alpha-numeric characters (plus _ and
>-) in 0.8
>
>I think a compelling case has to be made ( with some real world use cases
>) to change this rule if adopted.
>
>
>On Sep 25, 2012, at 12:16 PM, Jun Rao <[EMAIL PROTECTED]> wrote:
>
>> There are a few issues related to topic names. First, we have some topic
>> specific metrics and jmx bean name has certain restrictions (e.g., no
>>space
>> allowed and maybe others). Second, in 0.8, we have a file that stores
>>high
>> watermarks. It's a simple text file and expects 1 line per
>>topic/partition.
>> If topic name has '\r' or '\n', it could mess up the format of the
>>file. A
>> simple solution is to restrict topic names to ASCII alpha-numeric
>> characters (plus _ and -) in 0.8. We can try to relax it in the future.
>> Anybody has concerns with this?
>>
>> Thanks,
>>
>> Jun