repair and boot mongodb on centos

When I somehow login and logout my linode vps where I start the service of mongodb for some times, then I got these errors: # service mongod startStarting mongod: Wed Oct 30 01:28:42.557Wed Oct 30 01:28:42.558 warning: 32-bit servers don't

When I somehow login and logout my linode vps where I start the service of mongodb for some times, then I got these errors:

<code class="language-text"># service mongod start
Starting mongod: Wed Oct 30 01:28:42.557
Wed Oct 30 01:28:42.558 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.
Wed Oct 30 01:28:42.558
about to fork child process, waiting until server is ready for connections.
forked process: 6873
all output going to: /var/log/mongo/mongod.log
ERROR: child process failed, exited with error number 100
                                                       [FAILED]
</code>

So, after googling, I find the reason:

<code class="language-text">Unclean shutdown detected.
Please visit http://dochub.mongodb.org/core/repair for recovery instructions.
</code>

How to resolve it?

First, kill the process if it exists

<code class="language-text">ps -ef | grep mongo*
ps -ef | grep mongod
kill -9 pid
</code>

Second, remove the lock file for mongodb

<code class="language-text">rm -rf /var/lib/mongo/mongod.lock
</code>

Third, boot it with repair mode

<code class="language-text">mongod -f /etc/mongod.conf --repair
</code>

Forth, boot again without repair mode

<code class="language-text">mongod -f /etc/mongod.conf
</code>

Now we can check if the mongodb process is running:

<code class="language-text">ps -ef | grep mongo*
ps -ef | grep mongod
</code>

And try it: mongo

Done!

原文地址：repair and boot mongodb on centos, 感谢原作者分享。