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Re: When ZooKeeper quorum is down - Kafka - [mail # user]
...Hi Omid,That is an interesting question.. This paragraph was written some time agoand we have not test ZK failure / resume since, and it is hard to tell ifthese cases still exist or not.One ...
   Author: Guozhang Wang, 2015-02-03, 16:34
Re: Kafka long tail latency issue - Kafka - [mail # user]
...Hi Xinyi,With ack = -1 and three replicas in ISR, the latency is bounded by the timespent on follower replica fetching from the leader most of the time, sincethe produce response cannot be a...
   Author: Guozhang Wang, 2015-02-03, 16:31
[expand - 3 more] - Re: Consumer not getting data when there is a big lag in the topic - Kafka - [mail # user]
...Dinesh,I took a look at your logs, first it seems error_logs_kafka_request.log isalso from the consumer side, not the server side.And the error logs are pointing to an EOF on the server side...
   Author: Guozhang Wang, 2015-02-03, 02:31
[KAFKA-1862] Pass in the Time object into OffsetManager - Kafka - [issue]
...We should improve OffsetManager to take in a Time instance as we do for LogManager and ReplicaManager. That way we can advance time with MockTime in test cases. Then we can move the testOffs...
http://issues.apache.org/jira/browse/KAFKA-1862    Author: Guozhang Wang, 2015-01-30, 19:40
[expand - 1 more] - Re: Errors from ReassignPartitionsCommand - Kafka - [mail # user]
...Each broker should have a controller log, and at one period of time onlyone of them will host the controller, while others' controller logs will bealmost empty. If you found some entries lik...
   Author: Guozhang Wang, 2015-01-29, 22:13
[expand - 1 more] - Re: Consuming Kafka Messages Inside of EC2 Instances - Kafka - [mail # user]
...Sorry my previous link was not complete:https://cwiki.apache.org/confluence/display/KAFKA/FAQ#FAQ-Whycan%27tmyconsumers/producersconnecttothebrokers?On Wed, Jan 28, 2015 at 10:56 PM, Su She ...
   Author: Guozhang Wang, 2015-01-29, 16:14
Re: Error writing to highwatermark file - Kafka - [mail # user]
...Hi,Could you check if the specified file:/nfs/trust-machine/machine11/kafka-logs/replication-offset-checkpoint.tmpis not deleted beforehand?GuozhangOn Tue, Jan 27, 2015 at 10:54 PM, [EMAIL P...
   Author: Guozhang Wang, 2015-01-29, 05:30
Re: Poll RESULTS: Producer/Consumer languages - Kafka - [mail # user]
...Thanks for sharing this Otis, I am also quite surprised about Python / Gopopularity.At LinkedIn we use a REST proxy server for our non-java clients, butintroducing a second hop will also bri...
   Author: Guozhang Wang, 2015-01-29, 04:59
Re: [DISCUSSION] generate explicit error/failing metrics - Kafka - [mail # dev]
...I think this is more of a tooling issue that the new consumer may notdirectly resolve. On the other hand, the ConsumerOffsetChecker tool willreturn for each partition the consumer's current ...
   Author: Guozhang Wang, 2015-01-29, 04:52
[expand - 1 more] - Re: How to mark a message as needing to retry in Kafka? - Kafka - [mail # user]
...I see. If you are using the high-level consumer, once the message isreturned to the application it is considered "consumed", and current it isnot supported to "re-wind" to a previously consu...
   Author: Guozhang Wang, 2015-01-29, 03:02
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB