I'm running an application in a high traffic production environment in a PostgreSQL database. I have about 850-900 open connections at a time. Every day I get some errors from end users:
Could not connect to server: Address already in use (0x00002740/10084)
Is the server running on host "XXXXXXXX" and accepting TCP/IP
connections on port 5432?
When they try again they are able to open the connection.
This application is running at other clients too. Open connections there are lower and I don't have the issue there.
I'm not using PgBouncer.
Can somebody point me in the right direction?
Thanks in advance!
Related
I am running a Postgresql server hosted on heroku as part of an app I am developing. I've been using PGAdmin as a frontend to set up my tables and also check to make sure the app is correctly writing data to the tables. When I am at home it connects fine and I can use it with no problems. It also works when I tether to my phone's WiFi hotspot. However when I am in university on the WiFi it does not connect. I get the following error:
"could not connect to server: Connection timed out (0x0000274C/10060) Is the server
running on host <MY HOSTNAME> and accepting TCP/IP connections on port 5432?"
I'm trying to troubleshoot this. I tried the obvious things like checking my hostname and port are correct (they are, because it works from home!) and checking that Pgadmin has permissions in windows firewall (it does). Not sure what to try next.
Is it likely to be that the port is blocked? I used an online port checker which reported that the port (5432) was closed, however it also says this when using my phone's wifi hotspot (which normally works, as I said). Is there another port I can use with Postgresql?
OK, it turns out the port 5432 was actually closed on my university's WiFi. I was able to request that it be opened, and everything is now working.
I am new to PostgreSQL, and I want to use it on my personal laptop for personal projects. I use SQL Server and SQL Server Management Studio at work, coding-wise I'm ok but I need some help with setting up the localhost on my laptop.
So I downloaded PostgreSQL and installed it along with pgAdmin that came with the package.
During installation, it asked me to create a PostgreSQL superuser password, which I did.
Then I tried creating a new server using pgAdmin as follows:
General Tab:
Name: localhost
Server Group: Servers
Connect Now?: check
Connection Tab:
Host name/address: localhost Port: 5432
Maintenance database: postgres
Username: postgres
Password: [blank]
But when I click save I'm getting an error message:
Unable to connect to server: could not connect to server: Connection
refused (0x0000274D/10061) Is the server running on host
"localhost"(::1) and accepting TCP/IP connections on port 5432? could
not connect to server: Connection refused (0x0000274D/10061) Is the
server running on host "localhost"(127.0.0.1) and accepting TCP/IP
connections on port 5432?
Also tried replacing the password field with the Superuser password, getting the same error message.
Would greatly appreciate it if anyone offers any insights into this problem, I might just be a noob when it comes to server setups...
Thanks,
Mike
Update:
I believe there's a service I need to start as suggested by #Scott Moniz. I went into services.msc, tried to start the service postgresql-x64-10 - PostgreSQL Servier 10, and I got this error message:
"The postgresql-x64-10 - PostgreSQL Server 10 service on Local
Computer started and then stopped. Some services stop automatically if
they are not in use by other services or programs".
I then tried editing the property of the service, by changing the Log on as option to Local System Account and tried starting the service again, still got the same error message.
I'm using Windows 10 Home edition, it this helps to resolve the issues in anyway
Thanks,
Mike
Are you sure the database service is running and listening?
CLick Start>Run> type services.msc
Look for a postgresql service - if it does not say started right click it and click Start.
Alternatively you can restart your computer and the service should start if it is set to 'Automatic'
I am using postgres database which is accessed by jboss and tomcat server.
My server accidentally restarted and then postgres service was not showing in the services list.
When I tried to open postgres local host server using pgadminIII it showed following error:
Server doesn't listen
The server doesn't accept connections: the connection library reports
could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (::1) and accepting TCP/IP connections on port 5432? could not connect to server: Connection refused (0x0000274D/10061) Is the server running on host "localhost" (127.0.0.1) and accepting TCP/IP connections on port 5432?
If you encounter this message, please check if the server you're trying to contact is actually running PostgreSQL on the given port. Test if you have network connectivity from your client to the server host using ping or equivalent tools. Is your network / VPN / SSH tunnel / firewall configured correctly?
For security reasons, PostgreSQL does not listen on all available IP addresses on the server machine initially. In order to access the server over the network, you need to enable listening on the address first.
For PostgreSQL servers starting with version 8.0, this is controlled using the "listen_addresses" parameter in the postgresql.conf file. Here, you can enter a list of IP addresses the server should listen on, or simply use '*' to listen on all available IP addresses. For earlier servers (Version 7.3 or 7.4), you'll need to set the "tcpip_socket" parameter to 'true'.
You can use the postgresql.conf editor that is built into pgAdmin III to edit the postgresql.conf configuration file. After changing this file, you need to restart the server process to make the setting effective.
If you double-checked your configuration but still get this error message, it's still unlikely that you encounter a fatal PostgreSQL misbehaviour. You probably have some low level network connectivity problems (e.g. firewall configuration). Please check this thoroughly before reporting a bug to the PostgreSQL community.
Does this problem arise due to accessing same DB by two different servers?
My server accidentally restarted and then postgres service was not
showing in the services list.
You can't connect because it's not running. You can have as many clients connecting to a PostgreSQL server as your hardware can support - there is no problem with that.
Restart your PostgreSQL service. If it won't, check the logs for why. If you don't know where your PostgreSQL logs are now is a good time to find out. I can't tell you how to restart the service because you haven't said what OS you are running or how you installed PG. Check your documentation.
I am trying to connect from my office network to the database that create in heroku (Postgres). I am using Pgadmin but the connection fail:
could not connect to server:Connection timed out is the server running on host "ec2-54-204-43-200.compute-1.amazonaws.com" and accepting TCP/IP connections on port 5432?
but when I connect from my home this error doesn't exist so I think is a network issue that I have to resolve but I dont know what to see, just I disable my firewall but even that is not working .
Someone can know what can i do ?
Ok, I got the solution. I talk with the Networking departmment and the problem was to able the ip and port where I needed to connect it in the firewall.
I have created an application in delphi and backend is postgres when i run the application i get the following error
general sql error.could not connect to the server;no
connection could be made because the target machine actively refused
it.[127.0.0.1:1:5433 alias resumep
I uninstalled it and installed it again but it didnt work.Even i changed the port number while installing .
I changed the password and installed again but its giving same error
what is the solution to this problem?
The database cluster of a standard PostgreSQL installation is listening on port 5432. (You can, of course, set up additional db clusters on different ports or configure your database cluster to listen on any other port.)
Any particular reason you try 5433? This is probably the cause of your problem.
If no server is listening on port 5433, the connection is simply not possible.