Questions tagged [connectivity]

Establishing a connection to a database or database server.

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Windows Suspending PostgreSQL Process

Scenario: Customer’s system VM running Windows Server Standard 2019, 16GB RAM, Intel Xeon Gold 5122 @ 3.6GHz (2 processors 4 virtual processors) PostgreSQL starts and runs fine for 5 minutes - 2 ...
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Could my MySQL connection string 'options' bring my site down? [closed]

I moved from MariaDB 10.1 to 10.6 (link to my post initially trying to get my site back) and have been having difficulties keeping my website up ever since. It crashes with ASP C0000005 errors -- link ...
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sqldeveloper ORA-12505. TNS: listener does not currently know of SID given in connect descriptor, and restart oracleSersvice XE not working for me

I have been confused for a few days; I tried many ways but they did not work. Here are my tnsnames.ora and listener.ora. please help me out. tnsnames.ora: # tnsnames.ora Network Configuration File: C:\...
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How to connect to Oracle RAC from HOST

For a college project, I have to set up a RAC Instance and an application, I already managed to configure my RAC lab by using virtual machines by using this video guide, now I just need to program an ...
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Can connect to virtual MySql instance using 127.0.0.1, but not localhost

Running MySql 5.7.33 on a local VirtualBox instance. I have forwarded port 3306 from the virtual server to be accessible locally. On my virtual host, I have this in my /etc/mysql/my.cnf file ... [...
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1answer
159 views

How can I change the RSA key length from 1024 to 2048?

SQL Server Environment: OS version: Windows 2012 R2 Microsoft SQL Server 2014 (SP3-CU4-GDR) (KB4583462) - 12.0.6433.1 (X64) Instance type: Named instance When I am attempting to connect from a Docker ...
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1answer
60 views

Official documentation for all connection string parameters

I've been hunting for this information for years now but I don't seem to be able to find it: Is there any documentation available on docs.microsoft.com providing a table with all valid connection ...
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psql connects to AWS RDS instance for co-worker, but not for me

We're on an EC2 VM (the same EC2 VM on the same subnet as the RDS instance) running vanilla PostgreSQL 12.5, and using psql to connect to an AWS RDS PostgreSQL 12.5 instance. My co-worker and I run ...
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75 views

Remote computer can't connect to instance with backslash

We are migrating two instances of SQL Server 2008 on a Win7 machine to SQL Server 2019 on a Win10 server. The old server had two instances: 123.123.123.123 and 123.123.123.123\ABC. We had no ...
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Cannot connect to remote instance

I try to connect to a remote windows server that has a SQL Instance running using SQL Authentication via my local SSMS and this the error I get: Cannot connect to 123.123.123.123\WIN-ODF1AGSBGZ A ...
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603 views

PostgreSQL 'server closed the connection unexpectedly' when using the hostname (Azure VM)

I have a Postgres instance running on an Azure VM, which is inside an Azure Virtual Network, and the VM has a hostname. Connecting with PostgreSQL using the IP address works, but when I try to ...
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Linked server only works if I am on the machine itself. I can't use it from my local computer. what is missing?

I have a few queries that I use to monitor log shipping. Sometimes I want to run those queries on a different server. I usually do that through a linked server. I have a server called SQLDEV4-TS that ...
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132 views

SSMS Object Explorer The semaphore timeout period has expired

I'm having an issue connecting to a remote instance in SSMS. When trying to connect using the Object Explorer I get the following error message. A transport-level error has occurred when receiving ...
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1answer
365 views

Are postgres connection able to manage multiple requests at the same time?

I have an application using node Postgres driver to connect to my Postgres 12. The pool size is currently 1. Is it possible, for one connection, to have multiple requests sent before receiving the ...
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Testing SQL connections with UDL file

I am testing SQL connectivity between a SQL server (windows server 2000) and client PC that has no SQL tools installed (windows 2000 SP4). The client PC runs a java application that needs to connect ...
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SQL connections to java applications

I have an MSSQLServer2000 database that seems to have been working just fine until today. The DB connects to a java application on a remote server that passes the database data (login credentials, ...
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SQLSTATE[HY000] [2002] Connection refused with multiple connections

I am using Laravel 8.33.1 and mysql Ver 8.0.23-0ubuntu0.20.04.1 for Linux on x86_64 ((Ubuntu)) on my Ubuntu 20.04.1 LTS vps. As during development I also need to access data from my production db. ...
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PostgreSQL remote connection failing

I've recently installed PostgreSQL on my PC as a requirement for my DB class, and as a practice, I decided to try and setup a remote connection for it so I can access it via online services. But after ...
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How to configure the client certificate in Power BI desktop to authenticate with mutual TLS

I am trying to connect to a private data source from Power BI desktop. Data source has its own trusted root authority. I created my personal certificate and private key signed by this root CA. I ...
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1answer
12 views

Database not showing

I create a database in the terminal linux ubuntu,gave it all privileges,created the table,inserted the rows.When I open phpmyadmin the database isn't showing how do I connect them? I did use mysql -u ...
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1answer
979 views

Can Microsoft JDBC Driver 4.0 connect to SQL Server 2019 and perform DML without issue?

The SQL version compatibility BOL article advises that the minimum compatible JDBC driver version for SQL Server 2019 is 7.4. Can an older JDBC driver still connect to SQL Server 2019? Or can only the ...
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1answer
121 views

How to script server level objects in sql server?

I regularly do sql server installations (mainly sql server 2016), in virtual machines or otherwise, and I have a bunch of things like permissions, and linked servers and endpoints that I have mostly ...
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Trying to connect to DB2 through WinAutomation, which driver should I use?

I'm trying to connect to DB2 through winautomation, I haven't been able to make the connection by using the options below. I'm using the following connection string format Server=myAddress:...
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1answer
1k views

Not authorized on test to execute command

Here is my code: mongoose.connect(consts.database, { useNewUrlParser: true, useUnifiedTopology: true, sslCA: consts.databaseCert, }); //... const user = await db.userModel.findOne({ ...
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52 views

Trying to connect two SQL Server databases

I have been trying to connect to a SQL Server instance. When I use the IP address, it connects. But when I use the server name, it doesn't. The main reason why I need to use the name is because I want ...
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770 views

The listener supports no services - 2 databases on oracle linux 7

I'm running two 12c R2 databases on linux oracle 7.9 I've installed the first database (CDB) and also a listener and both of them were running fine. Then, I've installed another 12c R2 database (CDB2) ...
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121 views

SQL Native Client Upgrade

Application server for CRM has SQL native client 2008 version installed. I have installed SQL native client 2012 side by side as need to connect to an sql availability group listener. How do I get the ...
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Postgres: Allowed connections from any ip but still can't connect from Github Actions

I'm having some trouble setting my Postgres database to allow connections from all origins, specifically I can't seem to get my API to connect to it while running Github Actions for testing purposes. ...
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1answer
28 views

MV on remote/master table fails to resume syncing (after master db host was temporarily unreachable)

I have a fast-refresh materialized view in a target db (18c) that syncs from a remote table/master db (19c): --master db (19c) create materialized view log on master.workorder with primary key; --...
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1answer
808 views

Query to Linked Server Ignores Configured Timeout Connection

I need to know where to set the timeout for a login or a query to a linked server. If the server is down I don't want to waste too much time waiting for a timeout. (Our servers are on the same network ...
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2answers
509 views

SQL Server Connection Problem

I'm completely stuck on a connection problem that we're experiencing for users connecting to our SQL Server instance from a particular domain using a particular application. The error that we're ...
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mysql contacts wrong ip

I setup my MariaDB on my virtual machine and I can successfully connect to it locally. I can ping the machine too. However, when I contact via the host machine, I do not understand why instead of 192....
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1answer
524 views

The connection is no longer usable because the server response for a previously executed statement was incorrectly formatted

One of our application AX2013 is connecting to our DB's in an Availability group spanning three SQL2016 nodes. End users are getting some error in the application that always point to the same error ...
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1answer
66 views

MariaDB (RDS) going temporarily offline (with memory drop)

We have an issue with a database of ours on RDS running MariaDB 10.4.8 on a t3-large instance type. For the past week or so, it's been sporadically inaccessible with no errors I can find. During the ...
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PgAdmin 4 - How to connect to database using unix socket via ssh tunnel?

Even though it might sound related to this question, it isn't, because I'm intreseted in the use of unix sockets instead of TCP/IP ones. However, I am unable to connect to a remote PostgreSQL database ...
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218 views

Remote access problem - PostgreSQL

I'm don't know much about database management, so to enable the remote access to my postgresql db I followed some tutorials. I've updated pg_hba_conf and postgresql_conf files. In pg_hba_conf I added ...
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1answer
155 views

SQL Server Ubuntu server - failure: remote connection from Win 7

Our analytical lab (chemistry) has an information management system (LIMS) that uses a Microsoft SQL Server database. Technicians interact with the system through a Windows form application that is ...
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1answer
39 views

Unknown source of high number of connections

In MySQL/Aurora I see from time to time a spike in connections number (from about 100 to 4000): MySQL doc says: Connections The number of connection attempts (successful or not) to the MySQL server. ...
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1answer
246 views

How to save database connection information when using `psql`?

I am learning to use psql to work with a postgres database on linux. I can connect using a long connection string, for example by running: psql postgresql://myusername:mypassword@localhost:5433/dbname ...
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846 views

how do I prevent my postgres connection from timing out? (python, psycopg2)

very quick one from me: I have a python script that runs continuously, keeping an eye on a postgres database. I've set up a listening channel and everytime a relevant change is made, the script gets a ...
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42 views

Changing domain, can't connect [duplicate]

I have a server that hosts a SQL Server 2017 Entreprise Edition database. I changed domain on the server (e.g. attds.mg in fdsqq.mg). The problem is that I can't connect my application to the database....
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2k views

"The client and server cannot communicate, because they do not possess a common algorithm" error

The full error message is: System.Data.SqlClient.SqlException (0x80131904): A connection was successfully established with the server, but then an error occurred during the login process. (provider: ...
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134 views

2020-07-29T07:44:29.817503Z 108716 [Note] Aborted connection 108716 to db:

We are getting continuously logs in mysql error logs 2020-07-29T07:46:56.534666Z 111536 [Note] Aborted connection 111536 to db: '' user: '' host: '' (Got an error reading communication packets) we ...
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1answer
658 views

Keep getting "Connected to an idle instance" in 18c when trying to connect to database

I installed Oracle Database 18c yesterday and then installed Oracle Application Express v20.1. Everything was perfect and I was able to work on Apex too. Then I shutdown the computer and today I ...
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1answer
139 views

Lost SQL credentials and unable to connect to SQL via SQLCMD

I have a machine running SQL 2014 but have neither the windows authentication or sa authentication details due to mismanagement of a previous support team. Having tried logging in to SQL Management ...
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321 views

ORA-12518 and then TNS-12560, TNS-00534 and 64-bit Windows Error: 10022: Unknow Error when trying to connect to a cdb or a pdb (Oracle 12cR1)

I am seeking for help for a problem I try to resolve for a whole week. As the title say, I try to connect to a pdb or cdb and specifically using the @ statement. I created my instance named 'test', ...
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45 views

SQl connection to XAMP

i am trying to connect my database to XAMP . I got this error Warning: Use of undefined constant ID - assumed 'ID' (this will throw an Error in a future version of PHP) in C:\xampp\htdocs\Thairis\...
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Getting Error 10054 after renaming the server

When I open SQL Server I have error 10054. Recently I changed the server name and I probably have this problem since. How can I solve it?
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127 views

The service broker is administratively disabled

I have just restored some databases what use service broker from LIVE to staging. it is not working and when I put a profile trace to run it only shows messages related to database id 1 and 4, ...
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2answers
243 views

What happens if you lose the connection during a huge insert?

What happens when you lose your connection with the DB during a huge insert. Will part of the data be inserted? Will nothing be inserted? What is the reason for this? The example statement I am ...

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