【CentOS-7+ Ambari 2.7.0 + HDP 3.0+HAWQ2.3.00】遭遇問題及解決記錄

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：