I am trying to connect to an SQL Server remote database but I can't create new connection in Android although I can connect through a Java application with exact the same code. DriverManager.getConnection() throws an exception. Here's my code
public DatabaseManipulation()
{
URL=String.format(URL,localDatabaseName);
Connect();
}
public void Connect() {
try {
connection = DriverManager.getConnection(URL,
DATABASE_USERNAME, DATABASE_PASSWORD);
statement=connection.createStatement();
} catch(Exception e) {
Log.d("con",e.getMessage);
}
}
Exception:
"The TCP/IP connection to the host 192.168.100.23, port 1433 has
failed. Error: "/192.168.100.23:1433 - Network is unreachable. 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."."
When two or more SQL Servers are connected across network they do all communication using TCP/IP. The default port of SQL Server installation is 1433. This port can be changed through SQL Server Configuration Manager. TCP/IP should be enabled for SQL Server to be connected.
Go to All Programs >> Microsoft SQL Server 2008 >> Configuration Tools >> SQL Server Configuration Manager >> Select TCP/IP
Related
I am attempting to establish a connection to my local sqlserver instance on android with this line
Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:3306;DatabaseName=test", "admin", "password");
But I am getting this error
The TCP/IP connection to the host localhost, port 3306 has failed.
Error: "Connection refused. 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
I know that using jdbc to create direct database connections on android is not recommended for very good reasons, but that is not my concern right now.
I have verified in sql server configuration manager that tcp/ip is enabled for LOCAL and that IPAll TCP Port is set to 3306. I restarted the server after making these changes.
I have created a firewall rule allowing tcp/ip connections on port 3306 for local/domain connections inbound and outbound.
I checked the port with telnet telnet localhost 3306 and it connected.
Any help is appreciated, it is beginning to get frustrating.
Hi guys I am trying to connect NetBeans IDE with SqlServer, everything I did is correct, setting ports to 1433 in SQL Server Configurtion Manager and here is my code:
public Db(String login,String password, String dbname) throws SQLException{
try {
String url = "jdbc:sqlserver://MJRLGUE\\SWING;databaseName="+dbname+";integratedSecurity = false;";
Driver monDriver = new SQLServerDriver();
DriverManager.registerDriver(monDriver);
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
con = DriverManager.getConnection(url,login,password);
this.connecte = true;
System.out.println("Succes");
} catch (ClassNotFoundException e) {
System.out.println("echec driver "+e.toString());
this.connecte = false;
}
}
and the error message:
Try again com.microsoft.sqlserver.jdbc.SQLServerException: Failed to connect to host MJRLGUE, named instance swing. Error: "java.net.SocketTimeoutException: Receive timed out". Verify the server name and the instance name, and make sure that no firewalls block UDP traffic to port 1434. For SQL Server 2005 or later, verify that the SQL Server Browser service is running Execution on the host.
Exception in thread "main" java.lang.NullPointerException
at Model.Test.remplirDirecteur(Test.java:79)
at Main.main(Main.java:17)
C:\Users\Ghassane\AppData\Local\NetBeans\Cache\8.1\executor-snippets\run.xml:53: Java returned: 1
BUILD FAILED (total time: 29 seconds)
my instance name in SqlServer: MJRLGUE\SWING
code to connect the database: db= new Db("sa","ensak","SuiviMarche");
Check that you can ping the sql server from the machine running the code.
If you can you may need to to configure the sql server to allow remote connections, as you have said you already checked the firewall and I assumed the instance is running on the standard port of 1433
Also, check that you can you use SMSS to connect to the sql server from the machine running the code.
Edit:
Looking at your error message you are not using the standard port of 1433 as the message says you are trying to connect to 1434.
make sure that no firewalls block UDP traffic to port 1434
try using jdbc:sqlserver://localhost:1433 as your host.
check your url and make sure server is running properly and port number and service free from firewall.
I need to connect to Sql Server 2008 from java using jdbc 4.0.
I have a very simple code:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
String connectionUrl = "jdbc:sqlserver://localhost;" +
"integratedSecurity=true;";
Connection con = DriverManager.getConnection(connectionUrl);
But i have this error:
Exception in thread "main" com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. 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.".
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:190)
at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:241)
...
I follow this answer:https://stackoverflow.com/a/12524566/1554397
I added jdbc4.jar in Libraries/Compile
SQL Server Browser windows service is running.
In SQL Server Network Configuration i selected Enebled on TCP/IP properties.
I Set TCP Address to 1433.
On Run,VM Options i put -Djava.library.path=my path to sqljdbc_auth.dll
And copy in JDk ,in bin sqljdbc_auth.dll.
What should I do?
EDIT:
When write in cmd telnet localhost 1433 i get 'Could not open connection to the host,on port 1433'
If using Window authentication you can do something like:
String url = "jdbc:sqlserver://MYPC\\SQLEXPRESS;databaseName=MYDB;integratedSecurity=true";
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection conn = DriverManager.getConnection(url);
and then add the path to sqljdbc_auth.dll as a VM argument (you need sqljdbc4.jar in the build path).
Take a look here for a short step-by-step guide showing how to connect to SQL Server from Java should you need more details. Hope it helps!
I am using
Windows 7
Netbeans IDE 7.1.2
SQL Server Management Studio Express 2005
JDK1.6
I am getting the below error while connecting to the database:
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host has failed. java.net.ConnectException: Connection refused: connect
My connection string is:
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
Connection connection = DriverManager.getConnection(
"jdbc:sqlserver://127.0.0.1:1433;databaseName=dbcm;" +
"user=sa;password=sa");
I've checked below things:
In SQL Server Configuration Manager, Protocols for SQLEXPRESS : TCP/IP Enabled
In fact I made enable remaining 3 too.
SQL Server(SQLExpress) and SQL Browser Service both are running.
I followed the steps below to successfully connect to an SQLExpress instance using JDBC:
Configure TCP/IP communication with SQL Express
Open SQL Server Configuration Manager.
Go to SQL Server Network Configuration -> Protocols for SQLEXPRESS
Set the status of TCP/IP protocol to "Enabled" (if it is already not).
Open Properties window for TCP/IP, go to IP Addresses section.
Go to the bottom of this property page and set the TCP Port under IPAll to 1433.
Connect to the SQLExpress instance using Microsoft's JDBC driver for SQL Server
JDBC URL: jdbc:sqlserver://localhost;instance=SQLEXPRESS;databaseName=<your DB>;user=<your User>;password=<your Passwd>
I have a java program that connects to a MS SQL database. The program works perfectly when running through eclipse however I get an error when I run it through AIX:
java.sql.SQLException: Network error IOException: A remote host refused an attempted connect operation.
I am using jtds to connect:
String connectionString = "jdbc:jtds:sqlserver://"+dropez_ip_address+"/"+dropez_db_name;
ResultSet rs = null;
Statement stmt = null;
try{
Class.forName("net.sourceforge.jtds.jdbc.Driver");
Connection conn = DriverManager.getConnection(connectionString, dropez_db_username, dropez_db_password);
stmt = conn.createStatement();
}catch(Exception e){}
From jTDS documentation:
Why do I get java.sql.SQLException: "Network error IOException: Connection refused: connect" when trying to get a connection?
The "Connection refused" exception is thrown by jTDS when it is unable to connect to the server. There may be a number of reasons why this could happen:
The server name is misspelled or the port number is incorrect.
SQL Server is not configured to use TCP/IP. Either enable TCP/IP from SQL Server's Network Utility app or have jTDS connect via named pipes (see the URL format for information on how to do this).
There is a firewall blocking port 1433 on the server.
To check whether TCP/IP is enabled and the port is not blocked you can use "telnet 1433". Until telnet doesn't connect, jTDS won't either. If you can't figure out why, ask your network administrator for help.
My bet is your firewall does not allow the AIX host to connect.