I don't know why this is happening error
I'm trying to simply connect my database to jdbc
In the url jdbc:mysel://localhost:test you set the host as localhost and the port as test
There is no such port called test, you need to provide a port number.
Most likely you are using the default port for mysql, so you might need to provide one at all.
I am trying to connect to a database on my localhost machine from Eclipse using the JPA tools. I have been unable to achieve this so far. I want to create a JPA project and create the model from the tables that I have already created on the database. I do not seem to be able to get the connection string correct.
firstly I seem completely unable to create a SQL Server connection profile. Once I get to the second screen no options available that allow me to progress past it to completion. Found a thread on here that claimed this is a bug and I should use the generic driver instead. So this is what I tried.
I thought that the port number was 1433 and I have tried that but no change. I have also taken off the (localdb) part as the error message referenced it. Message remains the same.
Error Message
com.microsoft.sqlserver.jdbc.SQLServerException: The connection to the host (localdb), named instance mssqllocaldb failed. Error: "java.net.UnknownHostException: (localdb)". Verify the server and instance names and check that no firewall is blocking UDP traffic to port 1434. For SQL Server 2005 or later, verify that the SQL Server Browser Service is running on the host.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:191)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.getInstancePort(SQLServerConnection.java:5247)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.primaryPermissionCheck(SQLServerConnection.java:1871)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1608)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1459)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:773)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1168)
at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.createConnection(JDBCConnection.java:328)
at org.eclipse.datatools.connectivity.DriverConnectionBase.internalCreateConnection(DriverConnectionBase.java:105)
at org.eclipse.datatools.connectivity.DriverConnectionBase.open(DriverConnectionBase.java:54)
at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnection.open(JDBCConnection.java:96)
at org.eclipse.datatools.connectivity.drivers.jdbc.JDBCConnectionFactory.createConnection(JDBCConnectionFactory.java:53)
at org.eclipse.datatools.connectivity.internal.ConnectionFactoryProvider.createConnection(ConnectionFactoryProvider.java:83)
at org.eclipse.datatools.connectivity.internal.ConnectionProfile.createConnection(ConnectionProfile.java:359)
at org.eclipse.datatools.connectivity.ui.PingJob.createTestConnection(PingJob.java:76)
at org.eclipse.datatools.connectivity.ui.PingJob.run(PingJob.java:59)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:56)
I got the connection string from Visual studio as that is how I created the tables.
Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=IdpValidate;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False
I have checked the firewall on my machine but Eclipse is in there and I can connect no problems from Visual Studio so it can't be that (can it).
SQL Server Agent and SQL Server Browser are both on (again I can connect from elsewhere; mssms, vs, linqpad etc) Please help this is driving me mad!
I have also created a login and user (LetMeIn) but at the moment this is not making a diffrence as using my computer account can't connect through Eclsipe either.
It turns out I have two sql servers installed on my machine and I was trying to connect to the wrong one. :(
Im trying to execute a jar file from linux.The jar contains java code for connecting to sql server. When I try to execute the jar, Im getting the below error
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host servername, port 1433 has failed. Error: "null. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
The connect properties file seems to have a valid username/password. I have checked the sql server configuration manager and the TCP/IP protocol is enabled. Im able to execute the same jar file in winodws and the sql server connection is established fine without any issues. Please let me know the steps I have to take to get this issue resolved.
Any help on this is much appreciated. Thanks
I am new to Oracle, and am trying to run a simple example code with Java, but am getting this error when executing the code.. I am able to start up the listener via CMD and am also able to run SQL Plus. Can anyone give me a hand and tell me what I might be doing wrong?
Update:
I am using JDBC.
Database is local, and I actually had it working but it stopped working just today. I'm not really sure why though. Would you mind giving me some procedures to follow by since I don't know much.
Either:
The database isn't running
You got the URL wrong
There is a firewall in the way.
(This strange error message is produced by Oracle's JDBC driver when it can't connect to the database server. 'Network adapter' appears to refer to some component of their code, which isn't very useful. Real network adapters (NICs) don't establish connections at all: TCP protocol stacks do that. It would have been a lot more useful if they had just let the original ConnectException be thrown, or at least used its error message and let it appear in the stack trace.)
I had the same problem, and this is how I fixed it.
I was using the wrong port for my connection.
private final String DB_URL = "jdbc:oracle:thin:#localhost:1521:orcll"; // 1521 my wrong port
go to your localhost
(my localhost address) : https://localhost:1158/em
login
user name
password
connect as --> normal
Below 'General' click on LISTENER_localhost
look at you port number
Net Address (ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1522))
Connect to port 1522
Edit you connection
change port 1521 to 1522.
done
Another thing you might want to check that the listener.ora file matches the way you are trying to connect to the DB. If you were connecting via a localhost reference and your listener.ora file got changed from:
HOST = localhost
to
HOST = 192.168.XX.XX
then this can cause the error that you had unless you update your hosts file to accommodate for this. Someone might have made this change to allow for remote connections to the DB from other machines.
I figured out that in my case, my database was in different subnet than the subnet from where i was trying to access the db.
I had this error when i renamed the pc in the windows-properties. The pc-name must be updated in the listener.ora-file
Most probably you have listener configured wrongly, the hostname you specify in connection string must be the same as in the listener.
First check the Firewall and network related issues.
Check if Oracle Listener service is available and running. If not you may use Oracle Net Configuration Assistant tool to add and register new listener.
If the above steps are ok then you need to configure Oracle Listener appropriately. You may use Oracle Net Manager tool or edit “%ORACLE_HOME%\network\admin\listener.ora” file manually.
There are 2 options that need to be considered carefully:
Listening Locations associated with the Listener – Hostname(IP) and Port in Listening Location must exactly match the ones used in the connection string.
For example, if you use 192.168.74.139 as target hostname, then there must be Listening Location registered with the same IP address.
Also make sure the you use the same SID as indicated in Database Service associated with the Listener.
https://adhoctuts.com/fix-oracle-io-error-the-network-adapter-could-not-establish-the-connection-error/
IO Error: The Network Adapter could not establish the connection (CONNECTION_ID=iKQM6lBbSLiArrYuDqud8A==)
if you are facing this issue
1- make sure you have downloaded oracle databases like oracle 11g,19c, 21c, or any latest databases.
2- search for services in your computer or type win+r then services.mis then search for oracleservice you will find orcl or xe or any other sid like oracleserviceorcl;
after that you can test your connection using sql developer, sql plus or cmd
To resolve the Network Adapter Error I had to remove the - in the name of the computer name.
In my case, I needed to specify a viahost and viauser. Worth trying if you're in a complex system. :)
For me the basic oracle only was not installed. Please ensure you have oracle installed and then try checking host and port.
I was having issues with this as well. I was using the jdbc connection string to connect to the database. The hostname was incorrectly configured in the string. I am using Mac, and the same string was being used on Windows machines without an issue. On my connection string, I had to make sure that I had the full url with the appending "organizationname.com" to the end of the hostname.
Hope this helps.
Just try to re-create connection. In my situation one of jdbc connection stopped working for no reason. From console sqlplus was working ok.
It took me 2 hours to realize that If i create the same connection - it works.
I am trying to connect to SQL server using Java program.It runs on port 1433 by default. While trying to run the program, I get SocketTimedOutexception.
So, I used this query to check if it's listening to tcp port and it's output is null.
SELECT local_tcp_port
FROM sys.dm_exec_connections
WHERE session_id = ##SPID
GO
Results in NULL.
Since I am trying to connect on Local host, I use went to SQL server configuration manager
and ENABLED tcp/ip for MSSQLSERVER.(It was disabled by default) and then went to properties--> ip ddress and enabled IP12 since it was referring to 127.0.0.1 and restrted sql server.
Even now I am not able to connect to SQL server and it gives
java.net.SocketTimeOutException
Help me fix this.