Network error while attempting to run command 'saslStart'

Question

使用客户端连接远程vps服务器上的mongodb数据库时报错，ssh连接上去可以使用mongo连接，也可以使用
mongo -u admin -p passward --authenticationDatabase dbname 连接，配置文件中的ip绑定的是 0.0.0.0没问题，防火墙已经关闭了，但是在本地客户端

/etc/mongod.conf

[root@hwsrv-539295 ~]# cat /etc/mongod.conf
# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /var/log/mongodb/mongod.log

# Where and how to store data.
storage:
  dbPath: /var/lib/mongo
  journal:
    enabled: true
#  engine:
#  wiredTiger:

# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27017
  bindIp: 0.0.0.0  # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting.

security:
  authorization: enabled

#operationProfiling:

#replication:

#sharding:

## Enterprise-Only Options

#auditLog:

#snmp:

最近一次尝试连接的日志

2019-08-28T10:48:43.857+0000 I  NETWORK  [listener] connection accepted from 213.243.128.106:13258 #6 (1 connection now open)
2019-08-28T10:48:43.858+0000 I  NETWORK  [conn6] received client metadata from 213.243.128.106:13258 conn6: { application: { name: "robo3t" }, driver: { name: "MongoDB Internal Client", version: "3.4.3-10-g865d2fb" }, os: { type: "Darwin", name: "Mac OS X", architecture: "x86_64", version: "18.6.0" } }
2019-08-28T10:48:44.028+0000 E  -        [conn6] Assertion: Location34348: cannot translate opcode 2010 src/mongo/rpc/message.h 120
2019-08-28T10:48:44.029+0000 I  NETWORK  [conn6] DBException handling request, closing client connection: Location34348: cannot translate opcode 2010
2019-08-28T10:48:44.029+0000 I  NETWORK  [conn6] end connection 213.243.128.106:13258 (0 connections now open)

Answer 1

是你的客户端与4.2不兼容。升级客户端以解决问题。
根据你的错误日志：

2019-08-28T10:48:44.028+0000 E - [conn6] Assertion: Location34348: cannot translate opcode 2010 src/mongo/rpc/message.h 120

opcode = operation code，即操作代码2010不认识。查看message.h源码可以发现，2010是一个不再使用的操作代码，后面的注释已经很说明问题了：

These were used for intra-cluster communication in 3.2, but never by any driver. Deprecated in 3.6 by OP_MSG and removed in 4.2.

简单地说，你的客户端使用了一个并未公开的操作代码，并且该操作在3.6已经标记为过时了，4.2正式移除。

Answer 2

大兄弟，解决了吗？

我是docker 镜像部署的，感觉除了宿主机的环境略有些区别之外，其他都一样的。

个人推测，应该是缺少了 saslstart 相关的一些依赖，导致了加密/解密过程中出现的问题。

我现在的mongo 版本是 4.2.0，而4.0.10 是好的。