Guideline on higher version client to lower version Broker?

2021-01-23 Thread Ming Liu
Hi, I wonder what is the guideline on those scenarios? Is it recommended even if it is working? 1. Client 2.5.1, Broker 2.5.0 2. Client 2.6.1, Broker 2.5.0 Thanks! Ming

Guidance to downgrade the stateful Kafka stream application?

2020-12-17 Thread Ming Liu
Hi Team, I can't find any documentation or guidance on the expectation of the downgrade of stateful Kafka stream application (which has different rocksdb versions embedded). For example, if we upgrade from 2.2 to 2.5 (with binary upgrade only and using the same eager protocol) and somehow f

Can't trace any sendfile system call from Kafka process

2020-08-28 Thread Ming Liu
Hi One major reason that Kafka is fast is because it is using sendfile() for zero copy, as what it described at https://kafka.apache.org/documentation/#producerconfigs, This combination of pagecache and sendfile means that on a Kafka cluster where the consumers are mostly caught up you will s