Thanks to Jun Dao, There were ZK session expireations in the broker log. Are the expireations according to network delay? I want to know if the broker re-register to ZK, the topics is coming from reading disk or reading ram that cache topics info? ----- Original Message ----- From: Jun Rao <jun...@gmail.com> To: kafka-users@incubator.apache.org, zlai_2...@sina.com Subject: Re: kafka broker re-register Date: 2012-11-09 23:28
Were there ZK session expirations in the broker log? Broker registers when ZK session expires. Thanks, Jun On Fri, Nov 9, 2012 at 1:24 AM, <zlai_2...@sina.com> wrote: Hi, allI have some problem with using kafka-0.7.1. I use a cluster with 4 brokers. They are runing well before.However, I found all brokers re-registered to zk yesterday. The log is blow:[2012-11-08 09:58:17,805] INFO re-registering broker info in ZK for broker 2 (kafka.server.KafkaZooKeeper)[2012-11-08 09:58:17,944] INFO re-registering broker topics in ZK for broker 2 (kafka.server.KafkaZooKeeper)...... I want to know why the brokers re-register?I had deleted some topics in ZK that are not used now. But I had not delete data with these topics on the brokers.So, this re-registry bring these topics that had been deleted into ZK again. If I delete these data with these topics on the broker, and delete these topics in ZK, but I do not restart brokers.When the brokers re-register again, the brokers will bring these topics(had been deleted) into ZK ?The brokers get info of topics from ram or disk? Thanks All.
