mongodb: Remote server has closed the connection

<?php
function getMongoClient($seeds = "", $options = array(), $retry = 3) {
    try {
        return new MongoClient($seeds, $options);
    } catch(Exception $e) {
        /* Log the exception so we can look into why mongod failed later */
        logException($e);
    }
    if ($retry > 0) {
        return getMongoClient($seeds, $options, --$retry);
    }
    throw new Exception("I've tried several times getting MongoClient.. Is mongod really running?");
}
 
try {
    $mc = getMongoClient("localhost", array());
} catch(Exception $e) {
    /* Can't connect to MongoDB! */
    logException($e);
    die("Can't do anything :(");
}

解决方法；失败重试