mongo: “exception: connect failed” - mongodb

Question

I am trying to connect to the mongo server, using the "mongo" command in the command prompt and this error is showing: "exception: connect failed"
Here is how I am trying to do it:
enter image description here
This is the mongodb.log
2018-03-27T14:00:19.299+0800 I CONTROL [main] ***** SERVER RESTARTED *****
2018-03-27T14:00:19.647+0800 I CONTROL [main] Trying to start Windows service 'MongoDB'
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] MongoDB starting : pid=10480 port=27017 dbpath=d:\mongodbData\db 64-bit host=DESKTOP-KEA31I3
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] targetMinOS: Windows 7/Windows Server 2008 R2
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] db version v3.6.3
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] git version: 9586e557d54ef70f9ca4b43c26892cd55257e1a5
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.1u-fips 22 Sep 2016
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] allocator: tcmalloc
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] modules: none
2018-03-27T14:00:19.648+0800 I CONTROL [initandlisten] build environment:
2018-03-27T14:00:19.649+0800 I CONTROL [initandlisten] distmod: 2008plus-ssl
2018-03-27T14:00:19.649+0800 I CONTROL [initandlisten] distarch: x86_64
2018-03-27T14:00:19.649+0800 I CONTROL [initandlisten] target_arch: x86_64
2018-03-27T14:00:19.649+0800 I CONTROL [initandlisten] options: { service: true, storage: { dbPath: "d:\mongodbData\db" }, systemLog: { destination: "file", logAppend: true, path: "d:\mongodbData\log\mongodb.log" } }
2018-03-27T14:00:19.651+0800 I - [initandlisten] Detected data files in d:\mongodbData\db created by the 'wiredTiger' storage engine, so setting the active storage engine to 'wiredTiger'.
2018-03-27T14:00:19.651+0800 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=7632M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),statistics_log=(wait=0),verbose=(recovery_progress),
2018-03-27T14:00:19.834+0800 I STORAGE [initandlisten] WiredTiger message [1522130419:833660][10480:140722874245456], txn-recover: Main recovery loop: starting at 4/6272
2018-03-27T14:00:19.970+0800 I STORAGE [initandlisten] WiredTiger message [1522130419:970024][10480:140722874245456], txn-recover: Recovering log 4 through 5
2018-03-27T14:00:20.046+0800 I STORAGE [initandlisten] WiredTiger message [1522130420:46191][10480:140722874245456], txn-recover: Recovering log 5 through 5
2018-03-27T14:00:20.172+0800 I CONTROL [initandlisten]
2018-03-27T14:00:20.172+0800 I CONTROL [initandlisten] ** WARNING: Access control is not enabled for the database.
2018-03-27T14:00:20.172+0800 I CONTROL [initandlisten] ** Read and write access to data and configuration is unrestricted.
2018-03-27T14:00:20.172+0800 I CONTROL [initandlisten]
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** WARNING: This server is bound to localhost.
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** Remote systems will be unable to connect to this server.
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** Start the server with --bind_ip <address> to specify which IP
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** addresses it should serve responses from, or with --bind_ip_all to
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** bind to all interfaces. If this behavior is desired, start the
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** server with --bind_ip 127.0.0.1 to disable this warning.
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten]
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten]
2018-03-27T14:00:20.173+0800 I CONTROL [initandlisten] ** WARNING: The file system cache of this machine is configured to be greater than 40% of the total memory. This can lead to increased memory pressure and poor performance.
2018-03-27T14:00:20.174+0800 I CONTROL [initandlisten] See http://dochub.mongodb.org/core/wt-windows-system-file-cache
2018-03-27T14:00:20.174+0800 I CONTROL [initandlisten]
2018-03-27T14:00:20.402+0800 I FTDC [initandlisten] Initializing full-time diagnostic data capture with directory 'd:/mongodbData/db/diagnostic.data'
2018-03-27T14:00:20.404+0800 I NETWORK [initandlisten] waiting for connections on port 27017
2018-03-27T14:00:20.404+0800 I STORAGE [initandlisten] Service running
Please help me. How to fix it

Answer 1

Run this following command :
sudo service mongodb stop
sudo rm /var/lib/mongodb/mongod.lock
sudo service mongod restart
mongo