mongo服务器因为mongod.lock 被锁定无法正常运行

看log文件：

Sun May 20 18:26:04.630 [initandlisten] MongoDB starting : pid=2343 port=27017 dbpath=/home/pi/mongo/db/ 32-bit host=raspberrypi

Sun May 20 18:26:04.631 [initandlisten] 

Sun May 20 18:26:04.631 [initandlisten] ** NOTE: This is a 32 bit MongoDB binary.

Sun May 20 18:26:04.631 [initandlisten] **       32 bit builds are limited to less than 2GB of data (or less with --journal).

Sun May 20 18:26:04.631 [initandlisten] **       See http://dochub.mongodb.org/core/32bit

Sun May 20 18:26:04.631 [initandlisten] 

Sun May 20 18:26:04.631 [initandlisten] db version v2.4.10

Sun May 20 18:26:04.632 [initandlisten] git version: nogitversion

Sun May 20 18:26:04.632 [initandlisten] build info: Linux bm-wb-04 3.19.0-trunk-armmp #1 SMP Debian 3.19.1-1~exp1+plugwash1 (2015-03-28) armv7l BOOST_LIB_VERSION=1_55

Sun May 20 18:26:04.632 [initandlisten] allocator: system

Sun May 20 18:26:04.632 [initandlisten] options: { dbpath: "/home/pi/mongo/db/", journal: true, logpath: "/home/pi/mongo/mongod.log" }

Sun May 20 18:26:05.956 [initandlisten] journal dir=/home/pi/mongo/db/journal

Sun May 20 18:26:05.957 [initandlisten] recover : no journal files present, no recovery needed

Sun May 20 18:26:06.023 [initandlisten] ERROR: mmap private failed with out of memory. You are using a 32-bit build and probably need to upgrade to 64

Sun May 20 18:26:06.023 [initandlisten] Assertion: 13636:file /home/pi/mongo/db/xueqiu.5 open/create failed in createPrivateMap (look in log for more information)

0x662fa8 0x63527c 0x6196c0 0x6197bc 0x409d5c 0x4414fc 0x2ea634 0x2eaa3c 0x2eb55c 0x2ebd98 0x26f998 0x26fb94 0x175a20 0x177bf4 0x152bf0 0x7660e294 

 mongod(_ZN5mongo15printStackTraceERSo+0x1c) [0x662fa8]

 mongod(_ZN5mongo10logContextEPKc+0x110) [0x63527c]

 mongod(_ZN5mongo11msgassertedEiPKc+0xc0) [0x6196c0]

 mongod(_ZN5mongo18msgassertedNoTraceEiPKc+0) [0x6197bc]

 mongod(_ZN5mongo8MongoMMF13finishOpeningEv+0x308) [0x409d5c]

 mongod(_ZN5mongo13MongoDataFile12openExistingEPKc+0x9c) [0x4414fc]

 mongod(_ZN5mongo8Database16openExistingFileEi+0x23c) [0x2ea634]

 mongod(_ZN5mongo8Database12openAllFilesEv+0x24) [0x2eaa3c]

 mongod(_ZN5mongo8DatabaseC2EPKcRbRKSs+0x158) [0x2eb55c]

 mongod(_ZN5mongo14DatabaseHolder11getOrCreateERKSsS2_Rb+0x500) [0x2ebd98]

 mongod(_ZN5mongo6Client7Context11_finishInitEv+0x34) [0x26f998]

 mongod(_ZN5mongo6Client7ContextC1ERKSsS3_b+0x78) [0x26fb94]

 mongod(_ZN5mongo14_initAndListenEi+0xb00) [0x175a20]

 mongod(_ZN5mongo13initAndListenEi+0x14) [0x177bf4]

 mongod(main+0x2b8) [0x152bf0]

 /lib/arm-linux-gnueabihf/libc.so.6(__libc_start_main+0x114) [0x7660e294]

Sun May 20 18:26:06.035 [initandlisten] warning database /home/pi/mongo/db/ xueqiu could not be opened

Sun May 20 18:26:06.035 [initandlisten] DBException 13636: file /home/pi/mongo/db/xueqiu.5 open/create failed in createPrivateMap (look in log for more information)

Sun May 20 18:26:06.036 [initandlisten] exception in initAndListen: 13636 file /home/pi/mongo/db/xueqiu.5 open/create failed in createPrivateMap (look in log for more information), terminating

Sun May 20 18:26:06.036 dbexit: 

Sun May 20 18:26:06.036 [initandlisten] shutdown: going to close listening sockets...

Sun May 20 18:26:06.036 [initandlisten] shutdown: going to flush diaglog...

Sun May 20 18:26:06.036 [initandlisten] shutdown: going to close sockets...

Sun May 20 18:26:06.036 [initandlisten] shutdown: waiting for fs preallocator...

Sun May 20 18:26:06.036 [initandlisten] shutdown: lock for final commit...

Sun May 20 18:26:06.036 [initandlisten] shutdown: final commit...

Sun May 20 18:26:06.036 [initandlisten] shutdown: closing all files...

Sun May 20 18:26:06.037 [initandlisten] closeAllFiles() finished

Sun May 20 18:26:06.037 [initandlisten] journalCleanup...

Sun May 20 18:26:06.037 [initandlisten] removeJournalFiles

Sun May 20 18:26:06.050 [initandlisten] shutdown: removing fs lock...

Sun May 20 18:26:06.050 dbexit: really exiting now

应该是之前没有正常被关闭，导致文件本锁住了。
 
解决办法：
 
1. 先把数据文件备份， --dbpath 的路径整个备份一下， 不然接下来的操作误操作了数据就丢失了
 
2. 运行修复命令：

mongod --dbpath /data/db --repair
 
替换上面的db为您自己的本地路径