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    The MongoConnectionException class

    (PECL mongo >= 1.0.0)

    Introducere

    Thrown when the driver fails to connect to the database.

    There are a number of possible error messages to help you diagnose the connection problem. These are:

    • No candidate servers found

      Thrown when the driver cannot establish a connection to MongoDB (fulfilling the ReadPreferences, if specified).

    • No server name given.

      This error occurs if you pass in "" as the server name, probably because of an typo with string interpolation, e.g., "$servr" instead of "$server".

    • failed to get host [hostname] or port [portnum] from [server].

      This indicated that the server string was malformed. "[hostname]" and "[portnum]" will be as much as the driver could dicipher of it.

    • Operation in progress

      Connecting to the database timed out.

    • Transport endpoint is not connected

      Generally means that the connection string isn't correct, the driver couldn't even find the database server.

    • couldn't determine master

      No server in a replica set connection was identified as the primary.

    • couldn't get host info for [server]

      This indicated that DNS could not resolve the server address you gave. This could easily be caused by a typo, for example, "server" instead of "$server".

    • Invalid Argument

      This can be caused by attempting to connect to a machine that is up but that the database isn't actually running on. Make sure that you've started the database server before connecting.

    • Permission denied

      This means that the socket could not be opened due to permissions issues. On Red Hat variants, this can be caused by a default setting that does not allow Apache to create network connections. You can override this setting by running: 

      $ /usr/sbin/setsebool -P httpd_can_network_connect 1
      then restarting Apache.

    If the error message is not listed above, it is probably an error from the C socket, and you can search the web for its usual cause.

    Sinopsisul clasei

    MongoConnectionException extends MongoException {
    }
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    User Contributed Notes 1 note

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    jefffan24+phpcomment at gmail dot com
    11 years ago
    If you have MongoClient class available and use persist option you will have a bad time and get a MongoConnectionException

    For example if you have:

    <?php
    $options     = array(
                    'replicaSet' => false,
                    'persist' => false,
                    'connect' => false
                );
    return new \    Mongo('mongodb://...', $options);
    ?>

    This will not work if you have the mongo client class a better way to handle this if your not sure what is on the server this code is running on is the following:

    <?php
    $options     = array(
                    'replicaSet' => false,
                    'connect' => false
                );
            if(!    class_exists('MongoClient')){
                    $options['persist'] = false;
            }
            return new \    Mongo('mongodb:/...', $options);
    ?>

    This will only add it in the case where MongoClient doesn't exist and it needs it.  Hope this saves anyone some heart ache.
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