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Re: Replacing a broker in a cluster - Kafka - [mail # user]
...Hello Reshef,Have you checked this page?http://kafka.apache.org/documentation.html#basic_ops_cluster_expansionGuozhangOn Thu, Mar 20, 2014 at 5:44 AM, Reshef Mann  wrote: ...
   Author: Guozhang Wang, 2014-03-20, 15:59
Re: kafka/zk errors - Kafka - [mail # user]
...Hello Alex,Error 1,3 and 4 can be transient and expected if on brokerstartup/bouncing/shutdown, error 2 indicates the request type is incorrect:currently we only have up to type 10, which co...
   Author: Guozhang Wang, 2014-03-19, 23:06
Re: Can a producer detect when a topic has no consumers? - Kafka - [mail # user]
...Currently producers cannot detect if a topic is consumed by someone or notthemselves. If you want to know globally if a specific topic is consumed byanyone or not, you can query the ZK for a...
   Author: Guozhang Wang, 2014-03-19, 23:02
Re: Impact of slow consumers - Kafka - [mail # user]
...Hello Abhinav,When you say "slow consumer set on topic1", do you mean you have a consumergroup consuming from topic1, with one of them slow, or do you mean allconsumers are slow in that grou...
   Author: Guozhang Wang, 2014-03-18, 23:49
Re: about consumer group name - Kafka - [mail # user]
...The short answer to both questions is yes.For the second question, the long answer will be: on startup of thehigh-level consumer, it will register itself under its ZK group path, so itknows ...
   Author: Guozhang Wang, 2014-03-17, 22:49
Re: Review Request 18299: Fix KAFKA-1253 - Kafka - [mail # dev]
...This is an automatically generated e-mail. To reply, visit:https://reviews.apache.org/r/18299/#review37304core/src/test/scala/integration/kafka/api/ProducerSendTest.scala    W...
   Author: Guozhang Wang, 2014-03-15, 00:43
Re: consumer reaction to auto-create topics (0.8.1) - Kafka - [mail # user]
...Hi David,This issue should only happen if the following conditions are satisfied1) The consumer does not have any offset stored in ZK for this topic whenit first fetches messages for it.2) T...
   Author: Guozhang Wang, 2014-03-13, 17:21
Re: How kafka assign partition to stream - Kafka - [mail # user]
...Hi Yonghui,In 0.8 the load balance logic in consumers is based on range partitioningwith consumer-id as {consumer-1-stream-1, consumer-1-stream-2, ...consumer-1-stream-10, consumer-2-stream-...
   Author: Guozhang Wang, 2014-03-10, 17:44
Re: Apache Kafka Use Case at WalmartLabs - Kafka - [mail # user]
...Hello Bhavesh,1) If auto.create.topics.enable is turned on and consumer is subscribing toa wildcard topic, then producers can just send to new topics on the flywhich can be then captured by ...
   Author: Guozhang Wang, 2014-03-07, 21:15
[KAFKA-1286] Retry Can Block - Kafka - [issue]
...Under the following scenario the retry logic can block1. The last broker's socket closed, sender.handleDisconnect() triggered, put the node as disconnected.2. In the next sender.run(), s...
http://issues.apache.org/jira/browse/KAFKA-1286    Author: Guozhang Wang, 2014-03-05, 22:54
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