Dave's questions

sudo service mongod start在终端中执行时遇到以下错误。

    mongod.service - MongoDB Database Server
   Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2018-10-18 12:43:22 ACDT; 7s ago
     Docs: https://docs.mongodb.org/manual
  Process: 3155 ExecStart=/usr/bin/mongod --config /etc/mongod.conf (code=exited, status=100)
 Main PID: 3155 (code=exited, status=100)
      CPU: 22ms

Oct 18 12:43:22 david- systemd[1]: Started MongoDB Database Server.
Oct 18 12:43:22 david- mongod[3155]: 2018-10-18T12:43:22.736+1030 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
Oct 18 12:43:22 david- systemd[1]: mongod.service: Main process exited, code=exited, status=100/n/a
Oct 18 12:43:22 david- systemd[1]: mongod.service: Unit entered failed state.
Oct 18 12:43:22 david- systemd[1]: mongod.service: Failed with result 'exit-code'.

我对这个错误不熟悉，有人可以建议修复可能是什么吗？

我正在使用 mongo 工具中的 mongodump 下载我的服务器的备份。但是，当我运行该命令时，该命令返回“无法识别的字段'快照'”。

完整的错误是：

Failed: error reading collection: Failed to parse: { find: "data", skip: 0, snapshot: true, $readPreference: { mode: "secondaryPreferred" }, $db: "xxx" }. Unrecognized field 'snapshot'.

Mongodump --version 返回：

mongodump version: built-without-version-string
git version: built-without-git-spec
Go version: go1.7.3
   os: linux
   arch: amd64
   compiler: gc
OpenSSL version: OpenSSL 1.0.2g  1 Mar 2016

我可能需要降级我的版本？否则不确定从这里去哪里......