I am scraping data using a Windows VPS. I am using Python MySQL-Connector to upload this scraped data to a Linux dedicated server.
import mysql.connector
mydb = mysql.connector.connect(
host="...",
user="...",
password="...",
database="...",
connection_timeout=60
)
mycursor = mydb.cursor()
About 25% of the time this fails, or takes more than twenty seconds. When it fails I get a 10060 error. Is the problem more likely to be with my Linux server or more likely my Windows VPS? Help sincerely appreciated. Here is the error message:
2055: Lost connection to MySQL server at '[IP]:3306', system error: 10060 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.
This error is likely ralated to slow mysql database server, so you could do following:
Increase your connection_timeout to higher value i.e. 600.
Configure settings that are responsible for database server perormance (i.e. see this presentation - https://www.oracle.com/technetwork/community/developer-day/mysql-performance-tuning-403029.pdf) especially set mysql RAM usage server (1/2 of total system RAM - variable innodb_buffer_pool_size (set it in my.cnf))
Ensure that your closes cursor after your finished to use it, call mycursor.close.
Increase if possible resources (CPU, RAM, more faster disk drive) of a system with your database server.
Looking at the error message, I suspect this is caused by a port being blocked (the default TCP/IP port of the MySQL server is 3306).
Check if the port 3306 is busy:
netstat -tulpn | grep 3306
then try to free that port before running your app again.
Related
I'm a student and I'm trying to write some sensor values into a MySQL database.
As IDE I'll be using Inteliji.
First off I started by installing the database Plug-in.
This was done successfully
Next I tried to connect to the data base (see figure below)
Figure of successful connection
Now The next thing I want to do is use a MySQL connector.
Therefore I've installed MySQL onto the r-PI and used following code to implement it.
import mysql.connector
print("Step 1")
cnx = mysql.connector.connect(user='a21ib2a01',
password='secret',
host='mysql.studev.groept.be',
database='a21ib2a01')
Print("Step 2")
When now I run my code the terminal will output:
Step1
For some reason I don't know; the connect function always times my program out with the next occurring errors:
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on 'mysql.studev.groept.be:3306' (110 Connection timed out)
So does anyone know why my connection is successful but I can't connect to it?
Long story short what am I doing wrong and how do I fix this?
Thanks in advance!
Your timeout means the network on your rPi cannot reach -- cannot find a route to -- your MySQL host mysql.studev.groept.be.
If you do traceroute mysql.studev.groept.be in a shell in the rPi you may see what's wrong.
When in a shell on your rPi, can you ssh to any machine in your uni's network? If so, you might be able to use ssh port-forwarding to get a route to the database server.
Do you run intelliJ on the rPi directly, or on your laptop? If you run it on the laptop, it looks like the laptop can find a route to your server but the rPi cannot.
(If this were my project, I'd install a MySQL server on my laptop to reduce the network-engineering hassles of connecting through multiple hops involving a VPN.)
I'm working on a simple Python program to query a Redshift cluster using psycopg2. When I run the code on my local machine it works as expected: it creates the connection, it runs the queries and I get the expected outcome. However, I loaded it on my EC2 instance because I want to schedule several runs a week and the execution fails with the following error:
psycopg2.OperationalError: could not connect to server: Connection timed out
Is the server running on host "xxxx" and accepting
TCP/IP connections on port 5439?
Considering that the code is working without problems on the local machine and the security settings should be the same as EC2, do you have any suggestions and/or workarounds?
Thanks a lot.
I am using a windows XP machine that is using Microsoft SQl Server Enterprise Edition version 8.00.194, SQL-DMO version: 8.00.02 and ODBC version : 03.52.0000. I have another database of MySql on some other machine in the same network and I want to retrieve the data from that database to my XP machine's Sqlserver database. For this purpose I am trying to check whether I can connect to the local machine with my following python script (I use the pymssql library for this purpose):
import pymssql
con1=pymssql.connect(server="localhost:1433",user="XXXX",password="XXXX",database="XXXX")
print con1
con1.close()
I have purposefully removed the original username, password and db name. After running the above script I get the error:
Traceback (most recent call last):
File "D:\py_script_data_1st\1.py", line 9, in <module>
con1=pymssql.connect(server="localhost:1433",user="xxxx",password="xxxx",database="xxxx")
File "pymssql.pyx", line 636, in pymssql.connect (pymssql.c:10178)
OperationalError: (20009, 'DB-Lib error message 20009, severity 9:\nUnable to connect: Adaptive Server is unavailable or does not exist\nNet-Lib error during Unknown error (10061)\n')
I have searched extensively but did not get any working solution for that error. What I got was to open the port 1433. I have opened the sqlserver.exe instance in my firewall by following the instructions given https://support.microsoft.com/en-us/kb/841251
When I do telnet on port 1433 by using:
telnet localhost 1433
I get error that says could not connect to port 1433.
I would also like to add that the database on which I am working is of a library system. There are two machines on which issues/returns trasactions of the book takes place. So the other machine (which is also a windows XP machine) connects to the server machine using a software that uses netbios-ssn for the communication. I found this fact by using netstat command. Here is the output of that command:
TCP issue:netbios-ssn 192.168.48.45:2211 ESTABLISHED
TCP issue:netbios-ssn 192.168.48.48:3456 ESTABLISHED
I am extremely confused about these facts. I don't understand how can other machine access server's database using netbios-ssn port?
So, I have effectively two questions and solution to any one of them can help me out.
What is the solution for the problem of the python script ?
If the first problem cannot be solved, how can I achieve the connection to the database using netbios-ssn port?
Please help and feel free to ask any further information if you want.
I am not a network/web/internet programmer so please excuse my noobness in this area. I have gotten a website using a free hosting service. They include one MySQL database. Here are the details for the database:
port = 3306
host = "fdb4.biz.nf"
database = "1284899_6067"
user = "1284899_6067"
password = "somepass9351"
I am using MySQLdb module (installed on my CLIENT machine - not server) to connect to this database:
db = MySQLdb.connect(host=host, user=user, passwd=password, db=database,port=port)
But I get the following error:
OperationalError: (2003, "Can't connect to MySQL server on 'fdb4.biz.nf' (10060)
What I have already tried
tried two different databases from different hosts
tried changing the port
tried searching SO for similar answers but all others connect to 'local host'
What I think:
could this be caused by my firewall? I am using my school's internet. I don't think this could be it because I am on CLIENT so if anything it is the SERVER'S firewall.
Two questions
Can MySQLdb be used to connect to a db on a SERVER when it is imported on a CLIENT?
If yes, what am I doing wrong?
Thank you so much for any help, its greatly appreciated! Been stuck the whole day on this.
For security reasons, mysql only listens for connections from localhost. Error code 10060 is basically that: you are not allowed to connect remotely.
Solution: find a my.ini (or my.cnf in linux) and try to find a line:
bind-address = 127.0.0.1
this line says: allow only local connections. So, you should comment-out this line, or set your IP address.
Yes, MySQLdb can connect to remote hosts.
And your usage of the connect method is correct.
You should first check if you can connect to the remote mysql server from your mysql client.
In terminal you can type mysql -h hostname -u username -p databasename
This should prompt you for the password. Enter the password. Can you connect?
If you can't connect, then you have an access problem, and its not a python - mysqldb problem
Either the server is not reachable because it is behind a firewall, in that case your client machine's ip needs to be whitelisted. Check your firewall settings
Or, the mysql server running on the remote machine is configured to accept only local connections. I think this is the default, but I'm not sure. You should ssh into the server remote host where the database server is running, locate the my.cnf file on the server and check the settings. Depending on your mysql version, the configuration would look slightly different.
Or, the user that you're trying to connect as is not associated with the ip that you're trying to connect from. Mysql users have two parts, like this: 'username'#'host'. To enable a user to connect from all ips the user needs to look like this 'user'#'%'.
I hope I've given you enough to try to debug this issue.
Note:**I am connecting using Python2.7 in a virtualenv to access MySQL on XAMPP, which was not installed on the virtualenv.
I am trying to connect with MySQL via python. I recently downloaded MySQL connect from Oracle. I also downloaded the ODBC driver from the same site. When I plug in the information below, I get a 2003 error telling me that it cannot connect:
mysql.connector.errors.InterfaceError: 2003: Can't connect to MySQL server on '127.0.0.1'
but when I include the port number in my connection, it freezes up and nothing happens.
This is my code:
>>>import mysql.connector
>>>cnx = mysql.connector.connect(user='[my username]',password='[my password]',host='127.0.0.1', database='FXPrices',port=80)
After that, the cursor indents--so there are no arrows for the python prompt. I have to hit control-z every time I want it to stop. Do I need mod_wsgi to fix this?
You're trying to connect to the http port (port 80) on your machine.
MySQL by default listens to port 3306, you shoud try that (it's the same if you omit the port argument), or try to find out on which port your mysql server is really listening.