Mongodb服务器未启动

Question

我正在使用Django frameowrk。我的客户端在js，后端使用mongodb。两天后，我停下来，重新启动Apache2服务器，网站运行良好。今天突然网站显示500 Internel serve error。当我检查了error.log文件时，它显示：

[.....] ConnectionError: Cannot connect to the database: 
[.....] could not connect to localhost:27017: [Errno 111] Connection refused 

所以，我试图测试通过python这样的连接mongodb：使用$mongo

>>> from pymongo import Connection 
>>> connection = Connection('localhost',27017) 
Traceback (most recent call last): 
File "<stdin>", line 1, in <module> 
File "/usr/local/lib/python2.6/dist-packages/pymongo/connection.py", line 381, in __init__ 
self.__find_node() 
File "/usr/local/lib/python2.6/dist-packages/pymongo/connection.py", line 659, in __find_node 
raise AutoReconnect(', '.join(errors)) 
pymongo.errors.AutoReconnect: could not connect to localhost:27017: [Errno 111] Connection refused 

我还测试了连接，它显示：

MongoDB shell version: 2.4.9 
connecting to: test 
Mon Jan 20 15:22:53.729 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:145 
exception: connect failed 

我试图寻找答案搜索到这个问题，并在那里我看见人们都在讲要删除mongod.lock文件并重新启动像这里Pymongo keeps refusing the connection at 27017和MongoDB won't start after server crash mongodb但这里写道：http://docs.mongodb.org/manual/tutorial/recover-data-following-unexpected-shutdown/In normal operation, you should never remove the mongod.lock file and start mongod. Instead consider the one of the above methods to recover the database and remove the lock files. In dire situations you can remove the lockfile, and start the database using the possibly corrupt files, and attempt to recover data from the database; however, it’s impossible to predict the state of the database in these situations.我真的很困惑怎么办？我应该删除mongod.lock文件吗？另外，我是否首先需要启动mongodb服务器，然后启动apache2服务器？ MongoDB的日志文件显示：

tail -n -30 mongodb.log 

    ***** SERVER RESTARTED ***** 


    Mon Jan 20 15:10:19.740 [initandlisten] MongoDB starting : pid=8061 port=27017 dbpath=/var/lib/mongodb 64-bit host=hand 
    Mon Jan 20 15:10:19.740 [initandlisten] db version v2.4.9 
    Mon Jan 20 15:10:19.740 [initandlisten] git version: xxxxx //gives the number 
    Mon Jan 20 15:10:19.740 [initandlisten] build info: xxxx 
    Mon Jan 20 15:10:19.740 [initandlisten] allocator: tcmalloc 
    Mon Jan 20 15:10:19.740 [initandlisten] options: { config: "/etc/mongodb.conf", dbpath: "/var/lib/mongodb", logappend: "true", logpath: "/var/log/mongodb/mongodb.log" } 
    Mon Jan 20 15:10:19.742 [initandlisten] journal dir=/var/lib/mongodb/journal 
    Mon Jan 20 15:10:19.742 [initandlisten] recover : no journal files present, no recovery needed 
    Mon Jan 20 15:10:19.742 [initandlisten] 
    Mon Jan 20 15:10:19.742 [initandlisten] ERROR: Insufficient free space for journal files 
    Mon Jan 20 15:10:19.742 [initandlisten] Please make at least 3379MB available in /var/lib/mongodb/journal or use --smallfiles 
    Mon Jan 20 15:10:19.742 [initandlisten] 
    Mon Jan 20 15:10:19.743 [initandlisten] exception in initAndListen: 15926 Insufficient free space for journals, terminating 
    Mon Jan 20 15:10:19.743 dbexit: 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: going to close listening sockets... 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: going to flush diaglog... 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: going to close sockets... 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: waiting for fs preallocator... 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: lock for final commit... 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: final commit... 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: closing all files... 
    Mon Jan 20 15:10:19.743 [initandlisten] closeAllFiles() finished 
    Mon Jan 20 15:10:19.743 [initandlisten] journalCleanup... 
    Mon Jan 20 15:10:19.743 [initandlisten] removeJournalFiles 
    Mon Jan 20 15:10:19.743 [initandlisten] shutdown: removing fs lock... 
    Mon Jan 20 15:10:19.743 dbexit: really exiting now 

如果我运行下面的命令，它显示：

$ sudo service mongodb start 
    Starting database: mongodb failed! 

Answer 1

好了，该错误信息是相当清楚的：您没有足够的可用磁盘空间：

ERROR: Insufficient free space for journal files 
    Please make at least 3379MB available in 
            /var/lib/mongodb/journal or use --smallfiles 
    exception in initAndListen: 15926 Insufficient free space for journals, terminating 

一般来说，MongoDB相当贪婪的磁盘空间。特别是，恢复和压缩使用相当多的磁盘，因为它复制了它处理的数据文件。确保你总是有一些演出备用。