方法1:
kill -2法:
实验如下:
bash-4.2$ ps -ef | grep mongo
................................................................................
mongo 3847 1 0 17:03 ? 00:00:00 /usr/libexec/gconfd-2
mongo 3898 3219 0 17:03 ? 00:00:00 /usr/bin/gnome-software --gapplication-service
mongo 3902 1 0 17:03 ? 00:00:00 /usr/libexec/tracker-store
mongo 3909 1 0 17:03 ? 00:00:03 /usr/bin/vmtoolsd -n vmusr
mongo 3954 1 0 17:03 ? 00:00:00 /usr/libexec/gvfsd-trash --spawner :1.3 /org/gtk/gvfs/exec_spaw/0
mongo 3976 3498 0 17:03 ? 00:00:00 /usr/libexec/ibus-engine-simple
mongo 3982 1 0 17:03 ? 00:00:00 /usr/libexec/evolution-calendar-factory
mongo 4226 1 0 17:04 ? 00:00:00 /usr/libexec/dconf-service
mongo 4252 3470 1 17:05 ? 00:00:56 /usr/lib64/firefox/firefox
mongo 4764 1 0 17:20 ? 00:00:00 /usr/libexec/gvfsd-metadata
mongo 5409 1 0 17:27 ? 00:00:02 /usr/libexec/gnome-terminal-server
mongo 5412 5409 0 17:27 ? 00:00:00 gnome-pty-helper
mongo 5413 5409 0 17:27 pts/0 00:00:00 bash
mongo 6173 1 0 17:29 ? 00:00:14 mongod --config /etc/mongodb.conf --rest
mongo 8388 5413 0 18:07 pts/0 00:00:00 ps -ef
mongo 8389 5413 0 18:07 pts/0 00:00:00 grep mongo
找到mongod --config那一行对应的pid,然后执行:
bash-4.2$ kill -2 6173
注意：不能使用kill -9 PID 杀死进程，这样可能导致MongoDB数据库损坏。
再次连接MongoDB发现报错:
bash-4.2$ mongo
MongoDB shell version: 3.2.7-39-g8da92ea
connecting to: test
2016-07-01T18:07:54.741+0800 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2016-07-01T18:07:54.741+0800 E QUERY [thread1] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed :
connect@src/mongo/shell/mongo.js:229:14
@(connect):1:6
exception: connect failed
bash-4.2$
方法2:
用命令db.shutdownServer(),实验如下:
再次启动mongodb
bash-4.2$ mongod --config /etc/mongodb.conf --rest
about to fork child process, waiting until server is ready for connections.
forked process: 8570
child process started successfully, parent exiting
bash-4.2$ mongo
MongoDB shell version: 3.2.7-39-g8da92ea
connecting to: test
Server has startup warnings:
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten]
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten]
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten] ** We suggest setting it to 'never'
2016-07-01T18:12:42.307+0800 I CONTROL [initandlisten]
> use admin
switched to db admin
> db.shutdownServer();
server should be down...
2016-07-01T18:13:09.344+0800 I NETWORK [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2016-07-01T18:13:09.345+0800 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2016-07-01T18:13:09.345+0800 I NETWORK [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed
>
>
>
再次连接MongoDB发现报错:
bash-4.2$ mongo
MongoDB shell version: 3.2.7-39-g8da92ea
connecting to: test
2016-07-01T18:13:36.603+0800 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2016-07-01T18:13:36.603+0800 E QUERY [thread1] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed :
connect@src/mongo/shell/mongo.js:229:14
@(connect):1:6
exception: connect failed