启动zk之后，再启动kafka报异常：
zk异常
Got user-level KeeperException when processing sessionid:0x100001216130001 type:delete cxid:0x14a zxid:0x4c69d txntype:-1 reqpath:n/a Error Path:/admin/preferred_replica_election Error:KeeperErrorCode = NoNode for /admin/preferred_replica_election