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Re: could an Encoder/Decoder be stateful? - Kafka - [mail # user]
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...Each producer/consumer uses a single instance of the encoder/decoder.Thanks,JunOn Wed, May 15, 2013 at 7:20 PM, Rob Withers wrote:> Or is the same instance used for each (un)marshal...
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Author: Jun Rao,
2013-05-16, 05:03
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Re: API to to query messages amount under one topic - Kafka - [mail # user]
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...In 0.8, you can get the earliest and the latest offset using thegetOffsetBefore api. The difference btw the two gives the number ofmessages on the broker.Thanks,JunOn Wed, May 15, 2013 at 6:...
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Author: Jun Rao,
2013-05-16, 05:00
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Re: Capacity planning for kafka - Kafka - [mail # user]
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...In general, Kafka brokers are low in CPU, memory and I/Os. We do rely onthe broker server to cache all recent data in pagecache. The biggestcontraint is often the disk space, especially if y...
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Author: Jun Rao,
2013-05-16, 04:46
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[KAFKA-907] controller needs to close socket channel to brokers on exception - Kafka - [issue]
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...When the controller sends a request to a broker (e.g., leaderAndIsrRequest), it may hit a exception (e.g. SocketTimeException). When this happens, the socket channel needs to be closed and r...
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http://issues.apache.org/jira/browse/KAFKA-907
Author: Jun Rao,
2013-05-16, 00:04
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Re: Kafka 0.8 w/o ZK - Kafka - [mail # user]
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...In Kafka 0.8, the brokers and the consumer depend on ZK, but not theproducer. There is no way to run Kafka 0.8 w/o ZK.Thanks,JunOn Tue, May 14, 2013 at 4:02 PM, Timothy Chen wrote:>...
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Author: Jun Rao,
2013-05-15, 03:49
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Re: LeaderNotAvailableException - Kafka - [mail # user]
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...Any exceptions in the broker log (including state-change log)?Thanks,JunOn Tue, May 14, 2013 at 9:12 AM, Yu, Libo wrote:> Hi,>> I have 3 machines on a cluster. Normally, I sta...
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Author: Jun Rao,
2013-05-15, 03:47
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Re: a few questions from high level consumer documentation. - Kafka - [mail # user]
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...You understanding is correct. There should be no message loss, unless the #of correlated failures is larger than the replication factor.Thanks,JunOn Mon, May 13, 2013 at 8:46 AM, Yu, Libo &n...
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Author: Jun Rao,
2013-05-14, 03:51
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Re: exception report - Kafka - [mail # user]
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...So a lost and found dir is created on every dir? Which environment is this?Thanks,JunOn Mon, May 13, 2013 at 8:53 AM, Yu, Libo wrote:> That is exactly the case. I am told by admin l...
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Author: Jun Rao,
2013-05-13, 16:30
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Re: key used by producer - Kafka - [mail # user]
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...Note that the key is provided by the application. Kafka itself makes noeffort to make sure messages are in key order.Thanks,JunOn Mon, May 13, 2013 at 8:34 AM, Yu, Libo wrote:> Than...
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Author: Jun Rao,
2013-05-13, 16:27
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Re: Is there a limitation on the number of simultaneous consumer connections to the same topic - Kafka - [mail # user]
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...The only limit is #4 in http://kafka.apache.org/faq.htmlThanks,JunOn Mon, May 13, 2013 at 3:15 AM, Ming Li wrote:> Hi,>> Does Kafka have a limitation on the simultaneous conne...
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Author: Jun Rao,
2013-05-13, 15:12
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