I have successfully added mongodb to my server and I am able to work from the mongo shell no problem, I can also connect to the database from php just fine. I have also downloaded and semi successfully installed the plugin for mongodb and cakephp. However I am now stuck with cakephp not able to connect to the database. I have followed both ichikawa's github and mark story's web page on the subject but neither has helped get over this hump. Does anyone have any suggestions on what I should try to get this hooked up and running?
I ran into this and a buddy found a link that told us to replace line 185 of /app/Plugin/Mongodb/Model/Datasource/MongodbSource.php. Here is the old line and the new line.
// $this->connection = new Mongo($host, array("persist" => $this->config['persistent']));
$this->connection = new Mongo($host);
I can try to locate the URL but the solution was above.
Because your server using mongodb driver 1.x. Let's fix:
In app/Plugin/Monggodb/MongodbSource.php (line 197), find:
else if ($this->_driverVersion >= '1.3.0') {
$this->connection = new $class($host); // mongodb 2.x
}
replace:
else if ($this->_driverVersion >= '1.3.0' && $this->_driverVersion < '2.0') {
$this->connection = new $class("mongodb://loginID:password#IP"); // mongodb 1.5.6, loginID: your mongodb user login;
}
With above code, you changed connect string, because connect string had different between mongo 2.x and 1.x
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I'm currently working on a simple python CRUD script to check MongoDB out. Turns out I'm liking it a lot, but I have found myself being unable to work with MongoDB transactions. Everytime I try to start a transaction an exception is thrown saying:
This MongoDB deployment does not support retryable writes. Please add retryWrites=false to your connection string.
And, eventhough I've already added that option to my connection string:
self._client = MongoClient('mongodb://localhost/?retryWrites=false')
self._db = self._client.workouts
self._collection = self._db.workouts
That error is still popping up when running the following lines of code:
with self._client.start_session() as s:
with s.start_transaction():
self._collection.delete_one({'_id': id}, session=s)
next = self._collection.find_one({'_id': next_id}, session=s)
return next
What can I do?
I'm running python 3.7.3, pymongo 3.9.0 and MongoDB 4.0.12.
I followed this tutorial to deploy a sample application to Heroku. I just added the below method in MyResource class and returned the result from it instead of "Hello World" from getIt() method. I'm connecting to an atlas free tier cluster:
static String getMessage() {
MongoClient mongoClient = new MongoClient(new MongoClientURI("mongodb://<USER>:<PASSWORD>#cluster0-shard-00-00-2lbue.mongodb.net:27017,cluster0-shard-00-01-2lbue.mongodb.net:27017,cluster0-shard-00-02-2lbue.mongodb.net:27017/test?ssl=true&replicaSet=Cluster0-shard-0&authSource=admin"));
DB database = mongoClient.getDB("mastery");
DBCollection collection = database.getCollection("summary");
DBObject query = new BasicDBObject("_id", new ObjectId("5c563fa2645d6b444c018dcb"));
DBCursor cursor = collection.find(query);
return (String)cursor.one().get("message");
}
This is the driver I'm using:
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongodb-driver</artifactId>
<version>3.9.1</version>
</dependency>
This is my import:
import com.mongodb.*;
The application works fine from my local system. But I face the below error when I deploy the application to Heroku and hit the service:
INFO: Exception in monitor thread while connecting to server cluster0-shard-00-01-2lbue.mongodb.net:27017
com.mongodb.MongoCommandException: Command failed with error 8000 (AtlasError): 'no SNI name sent, make sure using a MongoDB 3.4+ driver/shell.' on server cluster0-shard-00-01-2lbue.mongodb.net:27017. The full response is { "ok" : 0, "errmsg" : "no SNI name sent, make sure using a MongoDB 3.4+ driver/shell.", "code" : 8000, "codeName" : "AtlasError" }
at com.mongodb.internal.connection.ProtocolHelper.getCommandFailureException(ProtocolHelper.java:179)
at com.mongodb.internal.connection.InternalStreamConnection.receiveCommandMessageResponse(InternalStreamConnection.java:299)
at com.mongodb.internal.connection.InternalStreamConnection.sendAndReceive(InternalStreamConnection.java:255)
at com.mongodb.internal.connection.CommandHelper.sendAndReceive(CommandHelper.java:83)
at com.mongodb.internal.connection.CommandHelper.executeCommand(CommandHelper.java:33)
at com.mongodb.internal.connection.InternalStreamConnectionInitializer.initializeConnectionDescription(InternalStreamConnectionInitializer.java:106)
at com.mongodb.internal.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:63)
at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:127)
at com.mongodb.internal.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:117)
at java.lang.Thread.run(Thread.java:748)
What is this SNI name? I can understand that the drivers are able to pick it from my machine, but not from Heroku machine. But I'm clueless on how to go about solving this! Is there a way to configure Heroku to reveal the SNI name when the driver asks for it? Can we get this value manually from somewhere in Heroku and directly feed it to the MongoDB drivers? Any help is appreciated.
EDIT:
It turned out that the client mentions the SNI name of the server it wishes to connect to as part of TLS security. And there seems to be a way to manually indicate the name in python driver. Is there any way to do this from java? Still puzzled why this is not an issue when running the app locally.
The code I was using to connect to the cluster turned out to be wrong. I followed the directions from the docs and it mentioned this:
To connect to an Atlas M0 (Free Tier) cluster, you must use Java
version 8 or greater and use a Java driver version that supports
MongoDB 3.4.
So I changed the java version to 1.8 in system.properties file:
java.runtime.version=1.8
It was earlier set to 1.7. I was also getting a deprecation warning on one of the methods I had used. So I again followed the docs to use the latest code and it worked like a charm.
The real takeaway here is to refer to the official docs everytime :)
1. {ok,P}= mongoc:connect({rs, <<"dev_mongodb">>, [ "dev_mongodb001:27017", "dev_mongodb002:27017"]}, [{name, mongopool}, {register, mongotopology}, { rp_mode, primary},{ rp_tags, [{tag,1}]}], [{login, <<"root">>}, {password, <<"mongoadmin">>}, {database, <<"admin">>}]).
2. {ok, Pool} = mc_topology:get_pool(P, []).
3. mongoc:find(Pool, {<<"DoctorLBS">>, <<"mongoMessage">>}, #{<<"type">> => <<"5">>}).
I used latest version in github, and got an error at step 3.
It seems my selector is not valid, is there any example of how to use mongodb-erlang ?
My mongodb version is 3.2.6, auth type is SCRAM-SHA1.
mongoc:find(Pool, <<"mongoMessage">>, #{<<"type">> => <<"5">>}).
I tried this in rs and single mode, still got this error.
Is there any other simple way to connect and read?
I just need to read some data once from mongo when my erlang program start, no other actions.
Todays version of mongo does not support tuple colldb due to new query api introduced in mongo 2.6
You should connect to DoctorLBS database instead, and than use
mongoc:find(Pool, <<"mongoMessage">>, #{<<"type">> => <<"5">>}).
Quite simply, I'm trying to connect to a MongoDB via Node.js:
Db = require('../v2/node_modules/mongodb').Db
Connection = require('../v2/node_modules/mongodb').Connection
Server = require('../v2/node_modules/mongodb').Server
console.log "before"
DbServer = new Server("localhost", 27017, {})
db = new Db("twitter", DbServer, {native_parser:true})
console.log "after"
return
That's my code and it's as simple as it gets. My output, however, seems to stop at the db = new Db... line.
It never gets to the after. It doesn't give an error either. I know I have a DB running and when I fire up MongoHub, it's there along with the twitter database
Just remove the native_parser=true would be ok
Native bson parser not compiled, please compile or avoid using native_parser=true
I've come across a node chat example on github, When I try to run it, I see the following error:
Error connecting to mongo perhaps it isn't running ?
I've installed mongo 0.9.2, nodejs 5.2 pre, npm 3.0 and other dependencies. The example can be found here: https://github.com/gregstewart/chat.io
I can not determine whether if the example not really works or I didn't run it right. Please help.
Did you install and start mongo-db on your system? This error is mostly because of a missing mongo instance running on the local machine.
Check out the follwing code excerpts from chat.io.
main.js:
/**
* Configure the user provider (mongodB connection for user data storage)
*/
var userProvider = new UserProvider('localhost', 27017);
Creates a new UserProvider object using host and port for database (localhost:27017, mongo-db default).
UserProvider.js:
UserProvider = function(host, port) {
this.db = new mongo.Db('node-mongo-chat', new Server(host, port, {auto_reconnect: true}, {}));
this.db.addListener('error', function(error) {
console.log('Error connecting to mongo -- perhaps it isn\'t running?');
});
this.db.open(function() {
});
};
Opening the connection to the server, printing out an error on failure (the error you mentioned above).
Consider reading up on the mongo-db docs concerning installation and setup here