====== クラッシュ対応  ======

====== クラッシュ、kill後の対応  ======

===== クラッシュ後の起動に失敗  =====

<code>
# /etc/init.d/mongod start
Starting mongod: about to fork child process, waiting until server is ready for connections.
all output going to: /var/log/mongo/mongod.log
forked process: 1820
ERROR: child process failed, exited with error number 100
[FAILED]
</code>

===== ログファイルを確認する  =====

<code>
***** SERVER RESTARTED *****


Mon May 27 22:46:52.124 [initandlisten] MongoDB starting : pid=1820 port=27017 dbpath=/var/lib/mongo 64-bit host=mongo01
Mon May 27 22:46:52.124 [initandlisten] db version v2.4.1
Mon May 27 22:46:52.124 [initandlisten] git version: 1560959e9ce11a693be8b4d0d160d633eee75110
Mon May 27 22:46:52.124 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Mon May 27 22:46:52.124 [initandlisten] allocator: tcmalloc
Mon May 27 22:46:52.124 [initandlisten] options: { config: "/etc/mongod.conf", dbpath: "/var/lib/mongo", fork: "true", logappend: "true", logpath: "/var/log/mongo/mongod.log", nojournal: "true", pidfilepath: "/var/run/mongodb/mongod.pid" }
**************
Unclean shutdown detected.
Please visit http://dochub.mongodb.org/core/repair for recovery instructions.
*************
Mon May 27 22:46:52.125 [initandlisten] exception in initAndListen: 12596 old lock file, terminating
Mon May 27 22:46:52.125 dbexit:
Mon May 27 22:46:52.125 [initandlisten] shutdown: going to close listening sockets...
Mon May 27 22:46:52.125 [initandlisten] shutdown: going to flush diaglog...
Mon May 27 22:46:52.125 [initandlisten] shutdown: going to close sockets...
Mon May 27 22:46:52.125 [initandlisten] shutdown: waiting for fs preallocator...
Mon May 27 22:46:52.125 [initandlisten] shutdown: closing all files...
Mon May 27 22:46:52.125 [initandlisten] closeAllFiles() finished
Mon May 27 22:46:52.125 dbexit: really exiting now
</code>

===== repair実行⇒失敗  =====

<code>
# mongod --repair
Mon May 27 22:45:21.146 [initandlisten] MongoDB starting : pid=1806 port=27017 dbpath=/data/db/ 64-bit host=mongo01
Mon May 27 22:45:21.146 [initandlisten] db version v2.4.1
Mon May 27 22:45:21.146 [initandlisten] git version: 1560959e9ce11a693be8b4d0d160d633eee75110
Mon May 27 22:45:21.146 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Mon May 27 22:45:21.146 [initandlisten] allocator: tcmalloc
Mon May 27 22:45:21.146 [initandlisten] options: { repair: true }
Mon May 27 22:45:21.147 [initandlisten] exception in initAndListen: 10296 
*********************************************************************
 ERROR: dbpath (/data/db/) does not exist.
 Create this directory or give existing directory in --dbpath.
 See http://dochub.mongodb.org/core/startingandstoppingmongo
*********************************************************************
, terminating
Mon May 27 22:45:21.147 dbexit: 
Mon May 27 22:45:21.147 [initandlisten] shutdown: going to close listening sockets...
Mon May 27 22:45:21.147 [initandlisten] shutdown: going to flush diaglog...
Mon May 27 22:45:21.147 [initandlisten] shutdown: going to close sockets...
Mon May 27 22:45:21.147 [initandlisten] shutdown: waiting for fs preallocator...
Mon May 27 22:45:21.147 [initandlisten] shutdown: closing all files...
Mon May 27 22:45:21.147 [initandlisten] closeAllFiles() finished
Mon May 27 22:45:21.147 dbexit: really exiting now
</code>

===== DBのパスを指定してrepair実行  =====

<code>
# mongod --repair --dbpath=/var/lib/mongo
</code>

===== repair終わったので実行⇒失敗  =====

<code>
# /etc/init.d/mongod start
Starting mongod: about to fork child process, waiting until server is ready for connections.
all output going to: /var/log/mongo/mongod.log
forked process: 1883
ERROR: child process failed, exited with error number 45
[FAILED]
</code>

===== ログをみる  =====

<code>
Mon May 27 22:49:56.114 [initandlisten] MongoDB starting : pid=1883 port=27017 dbpath=/var/lib/mongo 64-bit host=mongo01
Mon May 27 22:49:56.114 [initandlisten] db version v2.4.1
Mon May 27 22:49:56.114 [initandlisten] git version: 1560959e9ce11a693be8b4d0d160d633eee75110
Mon May 27 22:49:56.114 [initandlisten] build info: Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49
Mon May 27 22:49:56.114 [initandlisten] allocator: tcmalloc
Mon May 27 22:49:56.114 [initandlisten] options: { config: "/etc/mongod.conf", dbpath: "/var/lib/mongo", fork: "true", logappend: "true", logpath: "/var/log/mongo/mongod.log", nojournal: "true", pidfilepath: "/var/run/mongodb/mongod.pid" }
Mon May 27 22:49:56.201 [initandlisten] couldn't open /var/lib/mongo/mong_log.ns errno:13 Permission denied
Mon May 27 22:49:56.201 [initandlisten] error couldn't open file /var/lib/mongo/mong_log.ns terminating
Mon May 27 22:49:56.201 dbexit:
Mon May 27 22:49:56.201 [initandlisten] shutdown: going to close listening sockets...
Mon May 27 22:49:56.201 [initandlisten] shutdown: going to flush diaglog...
Mon May 27 22:49:56.201 [initandlisten] shutdown: going to close sockets...
Mon May 27 22:49:56.201 [initandlisten] shutdown: waiting for fs preallocator...
Mon May 27 22:49:56.201 [initandlisten] shutdown: closing all files...
Mon May 27 22:49:56.201 [initandlisten] closeAllFiles() finished
Mon May 27 22:49:56.201 [initandlisten] shutdown: removing fs lock...
Mon May 27 22:49:56.201 dbexit: really exiting now
</code>

===== 権限設定  =====

<code>
# chown -R mongod:mongod /var/lib/mongo
</code>

===== 起動成功  =====

<code>
# /etc/init.d/mongod start
Starting mongod: about to fork child process, waiting until server is ready for connections.
all output going to: /var/log/mongo/mongod.log
forked process: 1900
child process started successfully, parent exiting
[  OK  ]
</code>

===== 参考  =====

https://wiki.10gen.com/pages/viewpage.action?pageId=7831701