Error:couldn ' t connect to server 127.0.0.1:27017 at Src/mongo/shell/mongo.js__js

MongoDB directory permissions have been changed causing mongodb unexpected down machine

Start an error:

Tue APR 02:49:13.417 [Journal] warning:open of LSN file failed
Tue APR 02:50:25.482 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:50:25.482 [Journal] warning:open of LSN file failed
Tue APR 02:52:03.172 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:52:03.172 [Journal] warning:open of LSN file failed
Tue APR 02:53:13.817 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:53:13.817 [Journal] warning:open of LSN file failed
Tue APR 02:53:56.884 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:53:56.884 [Journal] warning:open of LSN file failed
Tue APR 02:55:52.733 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:55:52.733 [Journal] warning:open of LSN file failed
Tue APR 02:55:55.930 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:55:55.930 [Journal] warning:open of LSN file failed
Tue APR 02:57:37.438 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:57:37.438 [Journal] warning:open of LSN file failed
Tue APR 02:58:42.993 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:58:42.993 [Journal] warning:open of LSN file failed
Tue APR 02:59:03.107 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 02:59:03.107 [Journal] warning:open of LSN file failed
Tue APR 03:00:01.257 [conn837] Cmd:drop koolearn.tmp.mr.link_694
Tue APR 03:00:01.285 [conn837] Cmd:drop Koolearn.tmp.mr.link_694_inc
Tue APR 03:00:01.379 [conn837] Build index koolearn.tmp.mr.link_694_inc {0:1}
Tue APR 03:00:01.669 [conn837] Mr Failed, removing collection:: Caused by:: Boost::filesystem::create_directory:perm Ission den
IED: "/tol/mongodb/data/_tmp/esort.1397502001.1410"
Tue APR 03:00:01.672 [journal] in File::open ():: Open for '/tol/mongodb/data/journal/lsn ' failed with errno:13 Permiss Ion denied
Tue APR 03:00:01.672 [Journal] warning:open of LSN file failed

+++ View permissions, the discovery has become MySQL's

[Root@localhost tol]# Ll-h
Total 28K
drwx------2 MySQL MySQL 16K June 8 2013 Lost+found
Drwxr-xr-x 5 mysql MySQL 4.0K June 2013 MongoDB
Drwxrwxr-x 3 mysql mysql 4.0K Apr 05:38 mongo_dump

Change the permissions:

[Root@localhost tol]# chown-r mongodb:mongodb/tol/mongo*
[Root@localhost tol]# LS-LH
Total 28K
drwx------2 MySQL MySQL 16K June 8 2013 Lost+found
Drwxr-xr-x 5 MongoDB MongoDB 4.0K June 2013 MongoDB
Drwxrwxr-x 3 MongoDB mongodb 4.0K Apr 05:38 mongo_dump

+++ Start again:

[Mongodb@localhost ~]$ nohup mongod--auth--dbpath=/tol/mongodb/data/-- Logappend--port=27017 >/tol/mongodb/log/start_mongodb.log 2>&1 &
[1] 26948

[Mongodb@localhost ~]$ MONGO
MongoDB Shell version:2.4.4
Connecting To:koolearn
Tue Apr 17:46:01.367 JavaScript execution failed:Error:couldn ' t connect to server 127.0.0.1:27017 at src/mongo/shell/ mongo.js:L112
Exception:connect failed
[Mongodb@localhost ~]$

+++ Check found that because MONGO accidentally down cause Mongod.lock file exception, directly delete this file can be

[Mongodb@localhost mongodb]$ Locate Mongod.lock
/tol/mongodb/data/mongod.lock

[Mongodb@localhost data]$ MV Mongod.lock. /

+ + starts again to connect properly

[Mongodb@localhost ~]$ mongo-u xxxxxxx-p xxxx]xxx
MongoDB Shell version:2.4.4
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