Kafka core issues

Based source link <= basis, do small added:

• Kafka uses what? How to use the scene?

• What Kafka in the ISR, AR, also represent? ISR telescopic also refers to what

• Kafka in HW, LEO, LSO, LW so what they represent?

• Kafka is reflected in the order of how the news?

• Kafka in the district, a serializer, interceptor whether understand? What is the processing order between them?

• The overall structure of Kafka producers client look like?

• Kafka producers client uses several threads to handle? What are they?

• Consumers client's design legacy of Kafka's Scala What flaws?

• "The number of consumer spending in the group if the topic of partition over, then there will be less consumer spending data," this sentence is correct? If not, then there is no means to hack?

• It submitted when consumers submit consumer displacement or offset current consumption is offset to the latest news of + 1?

• What circumstances would cause duplication of spending?

• Under those scenarios can cause leakage news consumption?

• KafkaConsumer not thread-safe, then how to achieve multi-threaded consumption?

• Description of the relationship between the consumer and the consumer group

• When you use kafka-topics.sh create (deletion) of a topic, what is the logic behind Kafka would perform?

• Can you increase the number of partitions topic? If you can increase how? If not, that is why?

• You can reduce the number of partitions topic? If you can reduce how? If not, that is why?

• How to choose the number of partitions when you create a topic?

• Kafka There are those inside the topic, they have what characteristics? What is their role?

• What priority copy is? It have any special role?

• There are several places where Kafka concept of partition allocated? General principles and processes outlined

• Brief Kafka log directory structure

• Kafka in those index files?

• If I specify an offset, Kafka how to find the corresponding message?

• If I specify a timestamp, Kafka how to find the corresponding message?

• Chat with your understanding of the Log Retention Kafka's

• Chat with your understanding of the Log Compaction Kafka's

• Kafka chat your understanding of the underlying storage (page cache, the core layer, a block layer, the device layer)

• Principle chat Kafka delay operation

• Role chat Kafka controller

• What consumption rebalancing is the principle? (Tip: Consumers and consumer groups coordinator coordinator)

• Kafka idempotent is how to achieve

• Kafka in business is how to achieve (this question I was asked to interview six four times, according to the answer read have read ten minutes, the interviewer simply scrape shameless. Not really remember the words ... as long as your resume Kafka did not write proficient generally do not ask, I write on a resume is "familiar with Kafka, understand RabbitMQ ....")

• Kafka in those places need elections? These local elections and what strategy?

• What is meant by a copy of the failure? What are the responses?

• Under multiple copies, each copy of HW and LEO evolution

• Why Kafka does not support separate read and write?

• Kafka in terms of what had been done to improve the reliability? (HW, LeaderEpoch)

• Kafka in how to achieve the dead letter queue and retry queue?

• Kafka delay queue how to achieve (this question was asked that question even more than the transaction you will hear !!! Kafka, then you talk about delay queue how to achieve?)

• Kafka in how to do the message audit?

• Kafka in how to do news trajectory?

• Kafka has the configuration parameters is more interesting? Chat with your views

• Kafka has named those more interesting? Chat with your views

• Kafka What indicators need to focus on?

• How to calculate Lag? (Note that in a different state read_uncommitted and read_committed)

• Those design Kafka's let it have such a high performance?

• Kafka What are the advantages and disadvantages?

• What kind of homogeneity also used other products, what are the advantages and disadvantages compared to Kafka?

• Why Kafka?

• What are the difficulties encountered in the course of excessive use of Kafka? How to solve?

• How can we ensure the reliability of the Kafka great extent?

• Chat with your understanding of the ecology of Kafka