我在GCE上使用Kubernetes进行了集群配置，我为Zookeeper和Kafka提供了一个pod。在Zookeeper崩溃并重新启动之前，它一直在正常工作，并且开始拒绝来自kafka pod的连接:
Refusing session request for client
/10.4.4.58:52260as it has seenzxid 0x1962630
完整的拒绝日志在这里:
2017-08-21 20:05:32,013 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection from /10.4.4.58:52260
2017-08-21 20:05:32,013 [myid:] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@882] - Connection request from old client /10.4.4.58:52260; will be dropped if server is in r-o mode
2017-08-21 20:05:32,013 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@901] - Refusing session request for client /10.4.4.58:52260 as it has seen zxid 0x1962630 our last zxid is 0xab client must try another server
2017-08-21 20:05:32,013 [myid:] - INFO [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for client /10.4.4.58:52260 (no session established for client)
请您参考如下方法:
因为kafka维护一个zookeeper session ，该 session 会记住它所看到的最后一个zxid。因此，当动物园管理员的服务下降并再次出现时，zk的zxid从较小的值开始。 ZKserver认为kafka看到了更大的zxid，因此拒绝了它。
尝试重新启动kafka。
