db.runCommand({addshard:"localhost:10000"});
{ "ok" : 0, "errmsg" : "host already used" }
db.runCommand( { addshard : "localhost:10001" } );
{ "ok" : 0, "errmsg" : "host already used" }
how can i solve that problem? it is "host already used" error
please give me a tips to solve this~
According to mongodb source code this message say that you've already added this specified host:port as a shard:
// check whether this host:port is not an already a known shard
BSONObj old = conn->findOne( ShardNS::shard , BSON( "host" << host ) );
if ( ! old.isEmpty() ){
*errMsg = "host already used";
conn.done();
return false;
}
You can use listShards command to see your current shards:
db.runCommand( { listshards : 1 } );
Related
I know this question has been answered... using below
print("name,id,email");
db.User.find().forEach(function(user){
print(user.name+","+user._id.valueOf()+","+user.email);
});
But I am facing issue while reading the records whose fields start with number.
Below is the O/P
db.Detail.find({"Comment": /ABCD/,"CreateDt": { "$gte" : ISODate("2015-12-03") }},{'Data.01-WaitQueue.EndTime':1}).limit().pretty()
{
"Data" : {
"01-WaitQueue" : {
"EndTime" : ISODate("2015-12-03T02:39:11Z")
}
},
"_id" : ObjectId("565fab4ea5c75a3c4f000000")
}
When I am using forEach to convert into CSV
db.Detail.find({"Comment": /ABCD/,"CreateDt": { "$gte" : ISODate("2015-12-03") }},{'Data.01-WaitQueue.EndTime':1}).limit().forEach(function(PD) {
print(PD.Data.01-WaitQueue.EndTime +":"+ PD._id);
});
I am getting below error
Fri Dec 4 07:11:38 SyntaxError: missing ) after argument list (shell):1
Can someone please help me in rectifying it?
The exception is thrown because of the print line has syntax error.
Instead of
print(PD.Data.01-WaitQueue.EndTime +":"+ PD._id);
Try this instead:
print(PD.Data['01-WaitQueue'].EndTime +":"+ PD._id);
I am using mongodb 3.0.2 and when I run "top" command :
> db.runCommand( { top: 1 } )
I got the following error message:
2015-06-01T16:36:52.886+0900 E QUERY Error: error: {
"$err" : "BSONObj size: 46060490 (0x2BED3CA) is invalid. Size must be between 0 and 16793600(16MB)",
"code" : 10334
}
at Error ()
at DBQuery.next (src/mongo/shell/query.js:259:15)
at DBCollection.findOne (src/mongo/shell/collection.js:189:22)
at DB.runCommand (src/mongo/shell/db.js:58:41)
at (shell):1:4 at src/mongo/shell/query.js:259
It means that I can't monitor any longer, doesn't it? Can you guys show me the way out, please.
Some additional info:
DB size: 143.996GB - with wiredtiger enable.
Replication set enable.
No profiling.
I have restarted 2 shards on non standard ports, by chaning their .conf files. Now when I connect via mongo and issue a listshards I get:
mongos> db.runCommand( { listshards : 1 } );
Tue Oct 23 17:36:21 uncaught exception: error {
"$err" : "error creating initial database config information :: caused by :: socket exception [CONNECT_ERROR] for vserver-dev-2:37017",
"code" : 11002
}
(37017 is the old port).
How can I update the shard ports on the router (mongos) ?
Manual updating the ports on the mongo config server:
mongo
use config
configsvr> db.shards.update({_id: "shard0000"} , {$set: {"host" : "vserver-dev-2:37018"}})
configsvr> db.shards.find()
{ "_id" : "shard0000", "host" : "vserver-dev-2:37018" }
I am running updates against a database in MongoLab (Heroku) and cannot get information from getLastError.
As an example, below are statements to update a collection in a MongoDB database running locally in my machine (db version v2.0.3-rc1).
ariels-MacBook:mongodb ariel$ mongo
MongoDB shell version: 2.0.3-rc1
connecting to: test
> db.mycoll.insert({'key': '1','data': 'somevalue'});
> db.mycoll.find();
{ "_id" : ObjectId("505bcc5783cdc9e90ffcddd8"), "key" : "1", "data" : "somevalue" }
> db.mycoll.update({'key': '1'},{$set: {'data': 'anothervalue'}});
> db.runCommand('getlasterror');
{
"updatedExisting" : true,
"n" : 1,
"connectionId" : 4,
"err" : null,
"ok" : 1
}
>
All is well locally.
Now I switch to a database in MongoLab and run the same statements to update a document. getLastError is not returning an updatedExisting field. Hence, I am unable to test if my update was successful or otherwise.
ariels-MacBook:mongodb ariel$ mongo ds0000000.mongolab.com:00000/heroku_app00000 -u someuser -p somepassword
MongoDB shell version: 2.0.3-rc1
connecting to: ds000000.mongolab.com:00000/heroku_app00000
> db.mycoll.insert({'key': '1','data': 'somevalue'});
> db.mycoll.find();
{ "_id" : ObjectId("505bcf9b2421140a6b8490dd"), "key" : "1", "data" : "somevalue" }
> db.mycoll.update({'key': '1'},{$set: {'data': 'anothervalue'}});
> db.runCommand('getlasterror');
{
"n" : 0,
"lastOp" : NumberLong("5790450143685771265"),
"connectionId" : 1097505,
"err" : null,
"ok" : 1
}
> db.mycoll.find();
{ "_id" : ObjectId("505bcf9b2421140a6b8490dd"), "data" : "anothervalue", "key" : "1" }
>
Did anyone run into this?
If it matters, my resource at MongoLab is running mongod v2.0.7 (my shell is 2.0.3).
Not exactly sure what I am missing.
I am waiting to hear from their support (I will post here when I hear back) but wanted to check with you fine folks here as well just in case.
Thank you.
This looks to be a limitation of not having admin privileges to the mongod process. You might file a ticket with 10gen as it doesn't seem like a necessary limitation.
When I run Mongo in auth mode on my laptop I need to authenticate as a user in the admin database in order to see an "n" other than 0 or the "updatedExisting" field. When I authenticate as a user in any other database I get similar results to what you're seeing in MongoLab production.
(Full disclosure: I work for MongoLab. As a side note, I don't see the support ticket you mention in our system. We'd be happy to work with you directly if you'd like. You can reach us at support#mongolab.com or http://support.mongolab.com)
I am new to mongoDB and i have the following query as follows "db.runCommand( { addshard : "sf103", maxSize:100000 } );" Why we are using sf103 If i use this command in my Environment i am Getting following errors>>> db.runCommand( { addshard : "sf103", maxSize:100000 } );
{
"ok" : 0,
"errmsg" : "couldn't connect to new shard dbconnectionpool: connect failed sf103 : "
}
>
Here, The Sf103 represents what???? Please help me.......
Advance Thanks,
Kumar.
addshard takes the first parameter as "serverhostname[:port]". sf103 is a example host name they specified. What is the mongo host you want to add to the cluster. Please read the doc to understand how to configure the mongo cluster.
Mongo sharded cluster config
--Sai