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[KAFKA-1211] Hold the produce request with ack > 1 in purgatory until replicas' HW has larger than the produce offset - Kafka - [issue]
...Today during leader failover we will have a weakness period when the followers truncate their data before fetching from the new leader, i.e., number of in-sync replicas is just 1. If during ...
http://issues.apache.org/jira/browse/KAFKA-1211    Author: Guozhang Wang, 2014-07-25, 05:47
[KAFKA-1483] Split Brain about Leader Partitions - Kafka - [issue]
...Today in the server there are two places storing the leader partition info:1) leaderPartitions list in the ReplicaManager.2) leaderBrokerIdOpt in the Partition.1) is used as the ground truth...
http://issues.apache.org/jira/browse/KAFKA-1483    Author: Guozhang Wang, 2014-07-25, 00:51
[expand - 2 more] - Re: ConsumerConnector not processing partitions on a particular kafka broker. - Kafka - [mail # user]
...Hmm, that is a bit wired. Did you make sure the consumer logs are turned atleast on the INFO level?GuozhangOn Thu, Jul 24, 2014 at 10:05 AM, Pablo Picko  wrote: ...
   Author: Guozhang Wang, 2014-07-24, 17:22
[KAFKA-1192] Enable DumpLogSegments tool to deserialize messages - Kafka - [issue]
...Currently the DumpLogSegments tool reads the message payloads as strings by default, which will not display the messages correctly if the messages are deserialized with another class. By ena...
http://issues.apache.org/jira/browse/KAFKA-1192    Author: Guozhang Wang, 2014-07-24, 01:10
Re: num.partitions vs CreateTopicCommand.main(args) - Kafka - [mail # user]
...num.partitions is only used as a default value when the createTopic commanddoes not specify the num.partitions or it is automatically created. In yourcase since you always use its value in t...
   Author: Guozhang Wang, 2014-07-23, 23:58
[KAFKA-1462] Add new request and response formats for the new consumer and coordinator communication - Kafka - [issue]
...We need to add the request / response formats according to the new format protocol once their design is final:https://cwiki.apache.org/confluence/display/KAFKA/Kafka+0.9+Consumer+Rewrite+Des...
http://issues.apache.org/jira/browse/KAFKA-1462    Author: Guozhang Wang, 2014-07-22, 18:54
Re: how to ensure strong consistency with reasonable availability - Kafka - [mail # user]
...Hello Jiang,If some of your brokers have frequent long GC caused soft failures you cantake a look at the operational wiki page to see if that helps tuning GCsettings.https://cwiki.apache.org...
   Author: Guozhang Wang, 2014-07-22, 17:42
[expand - 3 more] - Re: New Consumer Design - Kafka - [mail # user]
...Hello Rob,If I get your idea right, the idea is that if the rebalance only changesthe ownership of a few consumers in the group, the coordinator can justsync with them and do not interrupt w...
   Author: Guozhang Wang, 2014-07-21, 23:46
[expand - 1 more] - Re: Review Request 23767: Fix KAFKA-1430 - Kafka - [mail # dev]
...This is an automatically generated e-mail. To reply, visit:https://reviews.apache.org/r/23767/(Updated July 21, 2014, 7:53 p.m.)Review request for kafka.Bugs: KAFKA-1430    ht...
   Author: Guozhang Wang, 2014-07-21, 19:53
[expand - 5 more] - Re: message loss for sync producer, acks=2, topic replicas=3 - Kafka - [mail # user]
...Hello Jiang,Follower replicas can fail out of ISR for reasons like soft failures, etcbesides performance. If you set the replica.lag.max.messages properly toprevent follower replicas to fail...
   Author: Guozhang Wang, 2014-07-21, 17:27
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