Running the program from eclipse is able to insert data into Mongo DB of the local machine, but not into Mongo DB of the remote machine
Here is the code I used:
package testing;
import com.mongodb.*;
public class MongoTest {
public static void main(String args[])
{
try
{
MongoClient cli=new MongoClient("10.6.9.227",27017);
DB dtbs=cli.getDB("test");
System.out.println("Connection to DB successful");
DBCollection col=dtbs.getCollection("newcol");
BasicDBObject record=new BasicDBObject("name","student1").append("sem","6");
col.insert(record);
System.out.println("Successfully Inserted into collection");
}
catch(Exception e)
{
System.out.println(e.getMessage());
}
}}
This code fits nicely into the same computer that this eclipse program is running from (which is set when the cli object is initialized 10.6.9.57).
But, when I try to do the same on a remote machine on the same local network (which is given by ip 10.6.9.227), this is what is displayed in the eclipse console:
Successful connection to DB Timeout after 10000 ms waiting for the server corresponding to AnyServerSelector {}. Cluster state client view: {type = Unknown, servers = [{address = 10.6.9.227: 28017, type = Unknown, state = Connection, exception = {java.lang.NullPointerException}}]
The machine 10.6.9.57 runs on Windows OS. I am launching the Eclipse program from here. The remote machine 10.6.9.227 is running Debian Squeeze OS.
I checked to see if the open ports are open via a command netstat
on system 227:
:~$ sudo netstat -lntup
>Active Internet connections (only servers)
>Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
>tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 848/portmap
>tcp 0 0 127.0.0.1:28017 0.0.0.0:* LISTEN 2421/mongod
>tcp 0 0 0.0.0.0:49396 0.0.0.0:* LISTEN 860/rpc.statd
>tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1566/sshd
>tcp 0 0 127.0.0.1:5984 0.0.0.0:* LISTEN 1163/beam.smp
>tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 2421/mongod
>tcp6 0 0 :::22 :::* LISTEN 1566/sshd
>udp 0 0 0.0.0.0:54866 0.0.0.0:* 860/rpc.statd
>udp 0 0 0.0.0.0:612 0.0.0.0:* 860/rpc.statd
>udp 0 0 0.0.0.0:32870 0.0.0.0:* 1260/avahi-daemon:
>udp 0 0 0.0.0.0:5353 0.0.0.0:* 1260/avahi-daemon:
>udp 0 0 0.0.0.0:111 0.0.0.0:* 848/portmap
>udp 0 0 10.6.9.227:123 0.0.0.0:* 1610/ntpd
>udp 0 0 127.0.0.1:123 0.0.0.0:* 1610/ntpd
>udp 0 0 0.0.0.0:123 0.0.0.0:* 1610/ntpd
>udp6 0 0 :::5353 :::* 1260/avahi-daemon:
>udp6 0 0 :::123 :::* 1610/ntpd
>udp6 0 0 :::50061 :::* 1260/avahi-daemon:
These ports are only open and I can also paste into this local machine from my own command line (via putty):
> db.newcol.insert({name:"firststudent"},{sem:"5"});
> db.newcol.find()
{ "_id" : ObjectId("5571366e1031fc034ac63013"), "name" : "firststudent" }
Also, this is what the Mongo DB log file looks like in / var / log / mongodb:
Fri Jun 5 10:39:02 Mongo DB : starting : pid = 2421 port = 27017 dbpath = /var/lib/mongodb master = 0 slave = 0 64-bit
Fri Jun 5 10:39:02 db version v1.4.4, pdfile version 4.5
Fri Jun 5 10:39:02 git version: nogitversion
Fri Jun 5 10:39:02 sys info: Linux bobek-a0 2.6.32-trunk-amd64 #1 SMP Sun Jan 10 22:40:40 UTC 2010 x86_64 BOOST_LIB_VERSION=1_42
Fri Jun 5 10:39:02 waiting for connections on port 27017
Fri Jun 5 10:39:02 web admin interface listening on port 28017
I just can't seem to work out why a java program launched from eclipse of a machine connected to the same local network is not able to do this. I have included mongo-java-driver-2.13.0-rc1.jar. I even tried to stop and restart the mongo db in the remote machine and repeat this process several times. But still unable to insert. Any help?
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-
telnet
from your window to the remote mongo box to the port27017
. See if you can. - connect to remote mongo from your local mongo client (not java / eclipse), see if it succeeds. Not from it own localhost, but from your computer to remote via the mongo client.
- Check the mongo configuration on the remote machine (especially check the
/etc/mongod.conf
value for the bind_ip parameter.
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