kafka-rolling-restart error

[qinzl1]

Broker 172.26.0.250 is down: HTTPConnectionPool(host='172.26.0.250', port=8778): Max retries exceeded with url: /jolokia//read/kafka.server:name=UnderReplicatedPartitions,type=ReplicaManager/Value (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f3e90c30850>: Failed to establish a new connection: [Errno 111] Connection refused',)).This maybe because it is starting up

[hayari]

verify jolokia opened port !