Today trying to run my project coded under Zend Framework, and connected to a remote database, i got those 2 errors:
PDOException: SQLSTATE[HY000] [2002] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. in C:\wamp\www\trunk\library\Zend\Db\Adapter\Pdo\Abstract.php on line 129
Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. in C:\wamp\www\trunk\library\Zend\Db\Adapter\Pdo\Abstract.php on line 144
Before it was working normally, and i don't know what going on with it today.
It seems it's a connection problem to the database but the question, where the problem come from, from the database server, or my project and where excatly.
It's the first time, i got this error, and i really don't know what that mean.
It sounds like a network problem to me, try a telnet from the app server:
telnet <remote db name/IP> 3306
If that fails, you have a network/firewall problem. Or the DB is is not listening on that port or on the network entirely. Do a netstat on the remote DB to confirm:
Linux
netstat -an | grep LISTENING
Or windows
netstat -an | find "LISTENING"
You should see :3306 if it's listening on the default port.
Related
I have running a EC2 instance with MongoDB and some .php files to deploy a little webpage.
PHP shows productos taken from MongoDB.
<?php
include_once("header.php");
require 'vendor/autoload.php';
$uri="mongodb://localhost";
$client=new MongoDB\Client($uri);
$collection = $client->tienda->categorias->find();
$categorias=array();
When I created DB it was no problem. After a new login to EC2 webpage doesn't show anything from DB.
When I try to check DB this error returns:
> use tienda
> show collections
2020-05-13T17:29:29.612+0000 I NETWORK [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2020-05-13T17:29:29.612+0000 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused
2020-05-13T17:29:29.612+0000 I NETWORK [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed
2020-05-13T17:29:29.612+0000 E QUERY [thread1] Error: socket exception [CONNECT_ERROR] for couldn't connect to server 127.0.0.1:27017, connection attempt failed :
runClientFunctionWithRetries#src/mongo/shell/session.js:346:31
runCommand#src/mongo/shell/session.js:412:25
DB.prototype._runCommandImpl#src/mongo/shell/db.js:145:16
DB.prototype.runCommand#src/mongo/shell/db.js:161:20
DB.prototype._getCollectionInfosCommand#src/mongo/shell/db.js:930:19
DB.prototype.getCollectionInfos#src/mongo/shell/db.js:953:19
DB.prototype.getCollectionNames#src/mongo/shell/db.js:964:16
shellHelper.show#src/mongo/shell/utils.js:809:9
shellHelper#src/mongo/shell/utils.js:706:15
#(shellhelp2):1:1
2020-05-13T17:24:05.117+0000 I NETWORK [thread1] trying reconnect to 127.0.0.1:27017 (127.0.0.1) failed
2020-05-13T17:24:05.117+0000 W NETWORK [thread1] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused
2020-05-13T17:24:05.117+0000 I NETWORK [thread1] reconnect 127.0.0.1:27017 (127.0.0.1) failed failed
After some google hours the only way I found to keep DB working is running on a new tab
$ mongod
Once I close this tab, DB stops to work and webpay stops to display products.
Is there any way to fix this?
I'm new to MongoDB btw.
You can run the MongoDB process as a daemon
mongod --fork --logpath /var/log/mongodb/mongod.log
Where logpath is where logs will be saved.
Documentation:
https://docs.mongodb.com/manual/tutorial/manage-mongodb-processes/
after the start apache server, i could not access PHPMyAdmin. when i try to access i get an error and auto-stop MySQL server.
- mysqli_real_connect(): (HY000/2002): No connection could be made
because the target machine actively refused it.
- Connection for controluser as defined in your configuration failed.
mysqli_real_connect(): (HY000/2002): No connection could be made
because the target machine actively refused it.
- phpMyAdmin tried to connect to the MySQL server, and the server
rejected the connection..
how can i solve this error
Add below line under config.inc.php
$cfg['Servers'][$i]['port'] = 8111;
If you are on Windows os and the above solution does not work, just check if your mysql is running with "netstat -ano" command, if the services are not running just try starting the mysql service.
I am new to MongoDB.I installed mongodb and used with Laravel framework.Its had been worked for a long time without any issues.But currently while i try to acess my website it shows:
Failed to connect to: localhost:27017: Connection refused
when i try to acces mongodb via command line,it shows:
warning: Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
Error: couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed at src/mongo/shell/mongo.js:146 exception: connect failed
when i try to access it via rock tool,it shows:
Unable to connect MongoDB, please check your configurations. MongoDB said:Failed to connect to: 127.0.0.1:27017: Connection refused.
what i will do? I can't figure what's wrong from my part since its working after the past months.I do nothing since the last days.Thanks in advance..
After a short break, I can find out the solution.
The origin of that issue is the unexpected shutdown of the system.So i run the below code in command prompt:
sudo rm /var/lib/mongodb/mongod.lock
mongod --repair
sudo service mongodb start
then after the above code run, its working fine :)
I have installed MongoDB in xampp on Ubuntu using Laravel 5.1. But I always get this error
MongoConnectionException in TestController.php line 19: Failed to
connect to: localhost:27017: Connection refused
Nor I'm able
I have gone through a lot of questions, but all proved to be trivial solution.
Please help me with this as I'm stuck on it.
I think that first thing to do is to ssh on that server and check that mongod process is alive, then try open mongo shell using command - mongo . If all works try telnet on this server and port from your machine ,if there is no errors , read mongo logs
I am facing an issue in connecting my php client to my mongodb server.
Basically, I installed MongoDB on my server (hosted in the US), I can connect to it locally when I am connected to it via ssh.
But I can't connect to this server on remote from my php client, here is the error that I get :
Fatal error: Uncaught exception 'MongoConnectionException' with message 'Failed to connect to: xxx.xxx.xxx.xxx:27017: Connection refused' in /var/www/pages/news.php:9 Stack trace: #0 /var/www/pages/news.php(9): MongoClient->__construct('mongodb://xxx.xxx...') #1 {main} thrown in /var/www/pages/news.php on line 9
I am using this in order to create a connection from my php client :
$m = new MongoClient("mongodb://xxx.xxx.xxx.xxx");
My remote server is Ubuntu 12.04 and I already added the INPUT and OUTPUT rules in iptables to allow traffic for the port 27017.
I don't really know where the issue comes from ? (I did not add any authentication credentials to my mongodb instance, its a new one for testing purposes).
If anyone had the same issue and found a solution, it could be helpful, thank you !
Ok guys, found the issue :
I typed this command in order to display the listening services and their corresponding ports:
netstat -anltp | grep "LISTEN"
I saw that SSH was listening with the IP : 0.0.0.0
But mongod was listening on the local interface 127.0.0.1
I just had to update the mongodb configuration file here :
/etc/mongodb.conf and set the parameter "bind_ip" to : 0.0.0.0
and uncommented the "port" field to use the default one : 27017.
As a result, now I can connect from my client to my mongod instance on my server.
Hope this helps !