Error: couldn't connect to server 127.0.0.1:27017 src/mongo/shell/mongo.js:91

最近开始学习mongo 在window的安装已经掌握，操作不难，工作中使用还是在linux的使用比较多。但是参考一些文档安装完毕后。发现在启动mongo时候出现了标题的错误

最终通过重新对路径的设置解决了此问题

解决办法：输入以下命令

[root@localhost mongodb]# ./bin/mongod -dbpath=/data/db

然后界面会出现：

[root@localhost mongodb]# ./bin/mongod -dbpath=/data/dbTue Dec 11 14:45:53 Tue Dec 11 14:45:53 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.Tue Dec 11 14:45:53 Tue Dec 11 14:45:53 [initandlisten] MongoDB starting : pid=3813 port=27017 dbpath=/data/db 32-bit host=localhost.localdomainTue Dec 11 14:45:53 [initandlisten] Tue Dec 11 14:45:53 [initandlisten] ** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of dataTue Dec 11 14:45:53 [initandlisten] **       see http://blog.mongodb.org/post/137788967/32-bit-limitationsTue Dec 11 14:45:53 [initandlisten] **       with --journal, the limit is lowerTue Dec 11 14:45:53 [initandlisten] Tue Dec 11 14:45:53 [initandlisten] db version v2.2.2, pdfile version 4.5Tue Dec 11 14:45:53 [initandlisten] git version: d1b43b61a5308c4ad0679d34b262c5af9d664267Tue Dec 11 14:45:53 [initandlisten] build info: Linux domU-12-31-39-01-70-B4 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_49Tue Dec 11 14:45:53 [initandlisten] options: { dbpath: "/data/db" }Tue Dec 11 14:45:53 [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*********************************************************************, terminatingTue Dec 11 14:45:53 dbexit: Tue Dec 11 14:45:53 [initandlisten] shutdown: going to close listening sockets...Tue Dec 11 14:45:53 [initandlisten] shutdown: going to flush diaglog...Tue Dec 11 14:45:53 [initandlisten] shutdown: going to close sockets...Tue Dec 11 14:45:53 [initandlisten] shutdown: waiting for fs preallocator...Tue Dec 11 14:45:53 [initandlisten] shutdown: closing all files...Tue Dec 11 14:45:53 [initandlisten] closeAllFiles() finishedTue Dec 11 14:45:53 dbexit: really exiting now[root@localhost mongodb]# ./bin/mongod -dbpath=/usr/local/mongodb/data/db/Tue Dec 11 14:46:53 Tue Dec 11 14:46:53 warning: 32-bit servers don't have journaling enabled by default. Please use --journal if you want durability.Tue Dec 11 14:46:53 Tue Dec 11 14:46:53 [initandlisten] MongoDB starting : pid=3819 port=27017 dbpath=/usr/local/mongodb/data/db/ 32-bit host=localhost.localdomainTue Dec 11 14:46:53 [initandlisten] Tue Dec 11 14:46:53 [initandlisten] ** NOTE: when using MongoDB 32 bit, you are limited to about 2 gigabytes of dataTue Dec 11 14:46:53 [initandlisten] **       see http://blog.mongodb.org/post/137788967/32-bit-limitationsTue Dec 11 14:46:53 [initandlisten] **       with --journal, the limit is lowerTue Dec 11 14:46:53 [initandlisten] Tue Dec 11 14:46:53 [initandlisten] db version v2.2.2, pdfile version 4.5Tue Dec 11 14:46:53 [initandlisten] git version: d1b43b61a5308c4ad0679d34b262c5af9d664267Tue Dec 11 14:46:53 [initandlisten] build info: Linux domU-12-31-39-01-70-B4 2.6.21.7-2.fc8xen #1 SMP Fri Feb 15 12:39:36 EST 2008 i686 BOOST_LIB_VERSION=1_49Tue Dec 11 14:46:53 [initandlisten] options: { dbpath: "/usr/local/mongodb/data/db/" }Tue Dec 11 14:46:53 [initandlisten] Unable to check for journal files due to: boost::filesystem::basic_directory_iterator constructor: No such file or directory: "/usr/local/mongodb/data/db/journal"Tue Dec 11 14:46:53 [initandlisten] waiting for connections on port 27017Tue Dec 11 14:46:53 [websvr] admin web console waiting for connections on port 28017Tue Dec 11 14:47:11 [initandlisten] connection accepted from 127.0.0.1:48783 #1 (1 connection now open)Tue Dec 11 14:49:04 [initandlisten] connection accepted from 192.168.0.137:2869 #2 (2 connections now open)Tue Dec 11 14:49:04 [FileAllocator] allocating new datafile /usr/local/mongodb/data/db/temp.ns, filling with zeroes...Tue Dec 11 14:49:04 [FileAllocator] creating directory /usr/local/mongodb/data/db/_tmpTue Dec 11 14:49:05 [FileAllocator] done allocating datafile /usr/local/mongodb/data/db/temp.ns, size: 16MB,  took 0.303 secsTue Dec 11 14:49:05 [FileAllocator] allocating new datafile /usr/local/mongodb/data/db/temp.0, filling with zeroes...Tue Dec 11 14:49:05 [FileAllocator] done allocating datafile /usr/local/mongodb/data/db/temp.0, size: 16MB,  took 0.328 secsTue Dec 11 14:49:05 [FileAllocator] allocating new datafile /usr/local/mongodb/data/db/temp.1, filling with zeroes...Tue Dec 11 14:49:05 [conn2] build index temp.users { _id: 1 }Tue Dec 11 14:49:05 [conn2] build index done.  scanned 0 total records. 0 secsTue Dec 11 14:49:05 [conn2] insert temp.users keyUpdates:0 locks(micros) w:652433 652msTue Dec 11 14:49:05 [conn2] end connection 192.168.0.137:2869 (1 connection now open)Tue Dec 11 14:49:05 [FileAllocator] done allocating datafile /usr/local/mongodb/data/db/temp.1, size: 32MB,  took 0.528 secs

表示设置成功，此时不要关闭这个界面，需要重新打开一个窗口来启动mongo

 

Last login: Tue Dec 11 14:05:30 2012 from 192.168.0.137[root@localhost ~]# lsanaconda-ks.cfg  Desktop  install.log  install.log.syslog[root@localhost ~]# cd /usr/local[root@localhost local]# lsbin    gcc-4.1.2         gcc-install    leveldb-1.5.0.tar.gz  lib      mongodb-linux-i686-2.0.8.tgz  redis-1.2.6.tar.gz   redis-2.6.6.tar.gz  srcetc    gcc-4.1.2.tar.gz  include        leveldb-1.7.0         libexec  mongodb-linux-i686-2.2.2.tgz  redis-2.4.14         sbingames  gcc-build         leveldb-1.5.0  leveldb-1.7.0.tar.gz  mongodb  redis-1.2.6                   redis-2.4.14.tar.gz  share[root@localhost local]# cd mongodb[root@localhost mongodb]# lsbin  db  GNU-AGPL-3.0  logs  README  THIRD-PARTY-NOTICES[root@localhost mongodb]# cd logs[root@localhost logs]# ls[root@localhost logs]# ls[root@localhost logs]# [root@localhost logs]# cd ..[root@localhost mongodb]# ./bin/mongoMongoDB shell version: 2.2.2connecting to: testWelcome to the MongoDB shell.For interactive help, type "help".For more comprehensive documentation, see        http://docs.mongodb.org/Questions? Try the support group        http://groups.google.com/group/mongodb-user> 

当出现这个时候表示启动成功，然后用java代码测试：

/** * MongoDbTest.java * 版权所有(C) 2012  * 创建:cuiran 2012-12-05 13:47:22 */package com.wpndemo.mongodb;import java.net.UnknownHostException;import org.bson.types.ObjectId;import com.mongodb.BasicDBObject;import com.mongodb.DB;import com.mongodb.DBCollection;import com.mongodb.DBCursor;import com.mongodb.DBObject;import com.mongodb.Mongo;import com.mongodb.MongoException;/** * TODO * @author cuiran * @version TODO */public class MongoDbTest { private Mongo mg = null;    private DB db;    private DBCollection users;  /**  * 初始化  * TODO  */ public void init(){ try {//mg=new Mongo(); mg=new Mongo("192.168.0.138",27017);} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();}catch (MongoException e) {// TODO Auto-generated catch blocke.printStackTrace();}//获取temp DB 如果默认没有 会自动创建db=mg.getDB("temp");//获取users Collection 如果默认没有 会自动创建users=db.getCollection("users"); }  /**  * 销毁  * TODO  */ public void destory(){ if(mg!=null){ mg.close(); } mg=null; db=null; users=null; System.gc();  } /**  * <b>function:</b> 查询所有数据  * @author cuiran  * @createDate 2012-12-11 09:24:11  */ public void queryAll(){ print("查询users的所有数据"); //Db游标 DBCursor cur=users.find(); while(cur.hasNext()){ print(cur.next()); } }  /**  *   *<b>function:</b>添加数据  * @author cuiran  * @createDate 2012-12-11 09:25:23  */ public void add(){ queryAll();  print("count:"+users.count()); DBObject user=new BasicDBObject(); user.put("name", "cuiran1"); user.put("age", 27); // users.save(user);// print(users.save(user).getN());  user.put("sex", "男"); print(users.save(user).getN());   print("count:"+users.count()); queryAll();  } /**  *   *<b>function:</b>删除数据  * @author cuiran  * @createDate 2012-12-11 09:38:12  */ public void remove(){ queryAll(); print("删除id = 50c68da852c2e1adb70f6d29：" + users.remove(new BasicDBObject("_id", new ObjectId("50c68da852c2e1adb70f6d29"))).getN()); queryAll(); }  public void print(Object o){ System.out.println(o); }   public void start(){ init(); add(); destory();// remove();// queryAll();   } /** * TODO * @param args */public static void main(String[] args) {// TODO Auto-generated method stubMongoDbTest t=new MongoDbTest();t.start();}}

运行结果：

 

查询users的所有数据count:00count:1查询users的所有数据{ "_id" : { "$oid" : "50c6d73952c25d5c9cec8c11"} , "name" : "cuiran1" , "age" : 27 , "sex" : "男"}