连接失败，提示：exception: login failed 以及 u-凯发k8国际娱乐官网入口

问题描述

使用如下命令连接dds实例时报错。

./mongo "mongodb://rwuser:xxxxxx@192.168.0.45:8635,192.168.0.96:8635/test?authsource=admin&replicaset=replica"

报错信息如下：

mongodb shell version v4.0.3
connecting to: mongodb://192.168.0.45:8635,192.168.0.96:8635/test?authsource=admin&replicaset=replica
2021-11-05t05:52:53.717 0000 i network  [js] starting new replica set monitor for replica/192.168.0.45:8635,192.168.0.96:8635
2021-11-05t05:52:53.718 0000 i network  [replicasetmonitor-taskexecutor] successfully connected to 192.168.0.45:8635 (1 connections now open to 192.168.0.45:8635 with a 5 second timeout)
2021-11-05t05:52:53.718 0000 i network  [js] successfully connected to 192.168.0.96:8635 (1 connections now open to 192.168.0.96:8635 with a 5 second timeout)
implicit session: session { "id" : uuid("5945d2a5-8275-4e3c-b06f-632f062a2ead") }
mongodb server version: 4.0.3
2021-11-05t05:52:53.722 0000 i network  [js] marking host 192.168.0.96:8635 as failed :: caused by :: location50692: can't authenticate against replica set node 192.168.0.96:8635 :: caused by :: error preflighting normalization: u_stringprep_prohibited_error
2021-11-05t05:52:53.722 0000 i network  [js] successfully connected to 192.168.0.45:8635 (1 connections now open to 192.168.0.45:8635 with a 0 second timeout)
2021-11-05t05:52:53.723 0000 i network  [js] marking host 192.168.0.45:8635 as failed :: caused by :: location50692: can't authenticate against replica set node 192.168.0.45:8635 :: caused by :: error preflighting normalization: u_stringprep_prohibited_error
2021-11-05t05:52:53.724 0000 i network  [js] marking host 192.168.0.96:8635 as failed :: caused by :: location50692: can't authenticate against replica set node 192.168.0.96:8635 :: caused by :: error preflighting normalization: u_stringprep_prohibited_error
2021-11-05t05:52:53.725 0000 i network  [js] marking host 192.168.0.45:8635 as failed :: caused by :: location50692: can't authenticate against replica set node 192.168.0.45:8635 :: caused by :: error preflighting normalization: u_stringprep_prohibited_error
2021-11-05t05:52:53.725 0000 e query    [js] error: can't authenticate against replica set node 192.168.0.45:8635 :: caused by :: error preflighting normalization: u_stringprep_prohibited_error :
db.prototype._authorthrow@src/mongo/shell/db.js:1685:20
@(auth):6:1
@(auth):1:2
exception: login failed

可能原因

输入的实例密码异常。

排查思路

• 检查设置的dds实例密码中是否有‘@’、‘%’和‘!’字符，如果有，需要转义。
• dds实例当前支持的特殊字符，有（~ ！@ # % ^ * - _ = ？，其中使用%@需要转义）。

处理方法

方法一：修改dds实例的密码，新密码中不能包含‘@’、‘%’和‘!’字符。

方法二：连接dds实例时，需要分别将‘@’、‘%’和‘!’字符进行转义，替换为对应的十六进制的url编码（ascii码）“@”、“%”和“!”。

例如：密码为****@%***!，对应的url编码为****@%***!。

背景知识

‘@’、‘%’和‘!’字符在dds实例连接时会作为特殊的字符进行处理，如果设置的dds实例中使用了上述字符，在使用高可用连接地址连接dds实例时，需要对其进行转义处理，否则不能得到预期的解析。