一、zookeeper超出最大連接限制:ambari server檢測到critical錯誤, zookeeper server on ep-bd01:2181 連接被積極拒絕,翻看主機上zookeeper的日誌
tail -n200 zookeeper-zookeeper-server-ep-bd01.out,發現都是如下錯誤:
2018-08-20 16:59:20,603 [myid:3] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@193] - Too many connections from /192.168.58.11 - max is 60 2018-08-20 16:59:20,619 [myid:3] - WARN [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@193] - Too many connections from /192.168.58.11 - max is 60
搜索後,在ambari界面上添加如下參數[maxClientCnxns],問題解決: