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    Expert tip

    If you're not using yet, consider using the SQLServerDataSource to set your server configurations. Also, check if the server is accepting TCP/IP connections and if there's no firewall blocking the connections.

Solutions on the web

via sourceforge.net by Unknown author, 2 years ago
No se pudo realizar la conexión TCP/IP al host localhost/SQLEXPRESS, puerto 1433. Error: "null. Verifique las propiedades de conexión, compruebe que hay una instancia de SQL Server ejecutándose en el host y aceptando las conexiones TCP/IP en el puerto y compruebe que no hay ningún firewall bloqueando las conexiones TCP en el puerto.".
via openxava by yerikab
, 1 year ago
No se pudo realizar la conexión TCP/IP al host localhost/SQLEXPRESS, puerto 1433. Error: "null. Verifique las propiedades de conexión, compruebe que hay una instancia de SQL Server ejecutándose en el host y aceptando las conexiones TCP/IP en el puerto y compruebe que no hay ningún firewall bloqueando las conexiones TCP en el puerto.".
via Stack Overflow by Xinus
, 1 year ago
The TCP/IP connection to the host localhost/SQLEXPRESS/Databases/HelloWorld, port 1433 has failed. Error: "null. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".
via microsoft.com by Unknown author, 2 years ago
The TCP/IP connection to the host JENESYS5/SQLEXPRESS, port 1433 has failed. Error: "null. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".
via microsoft.com by Unknown author, 2 years ago
The TCP/IP connection to the host JENESYS5/SQLEXPRESS, port 1433 has failed. Error: "null. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".
via microsoft.com by Unknown author, 2 years ago
The TCP/IP connection to the host JENESYS5/SQLEXPRESS, port 1433 has failed. Error: "null. Verify the connection properties, check that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port, and that no firewall is blocking TCP connections to the port.".
com.microsoft.sqlserver.jdbc.SQLServerException: No se pudo realizar la conexión TCP/IP al host localhost/SQLEXPRESS, puerto 1433. Error: "null. Verifique las propiedades de conexión, compruebe que hay una instancia de SQL Server ejecutándose en el host y aceptando las conexiones TCP/IP en el puerto y compruebe que no hay ningún firewall bloqueando las conexiones TCP en el puerto.".  	at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:171)	at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1033)	at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:817)	at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:700)	at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:842)	at java.sql.DriverManager.getConnection(Unknown Source)	at java.sql.DriverManager.getConnection(Unknown Source)	at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)	at org.hibernate.tool.hbm2ddl.ManagedProviderConnectionHelper.prepare(ManagedProviderConnectionHelper.java:52)	at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:168)	at org.hibernate.tool.ant.Hbm2DDLExporterTask.execute(Hbm2DDLExporterTask.java:42)	at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)	at org.apache.tools.ant.Task.perform(Task.java:348)	at org.apache.tools.ant.Target.execute(Target.java:357)	at org.apache.tools.ant.Target.performTasks(Target.java:385)	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)	at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)	at org.eclipse.ant.internal.launching.remote.EclipseSingleCheckExecutor.executeTargets(EclipseSingleCheckExecutor.java:30)	at org.apache.tools.ant.Project.executeTargets(Project.java:1189)	at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416)	at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)	at org.apache.tools.ant.Task.perform(Task.java:348)	at org.apache.tools.ant.Target.execute(Target.java:357)	at org.apache.tools.ant.Target.performTasks(Target.java:385)	at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)	at org.apache.tools.ant.Project.executeTarget(Project.java:1306)	at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)	at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)	at org.apache.tools.ant.Project.executeTargets(Project.java:1189)	at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:423)	at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:137)