Hibernate MS SQL connection

Question

I am connecting to MS SQL via hibernate using the jar jtds-1.3.0.jar and below is the configuration file

<hibernate-configuration>
<session-factory>
    <!-- Database connection settings -->
    <property name="connection.url">jdbc:jtds:sqlserver://localhost/login</property>
    <property name="connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property>
    <property name="connection.username">sa</property>
    <property name="connection.password">user</property>

    <!-- JDBC connection pool (use the built-in) -->
    <property name="connection.pool_size">1</property>

    <!-- SQL dialect -->
    <property name="dialect">org.hibernate.dialect.SQLServerDialect</property>


    <!-- Enable Hibernate's automatic session context management -->
    <property name="current_session_context_class">thread</property>

    <!-- Echo all executed SQL to stdout -->

        <property name="show_sql">true</property>
    <!--  Drop and re-create the database schema on startup -->
    <property name="hbm2ddl.auto">update</property>

    <!-- configuration pool via c3p0--> 
    <property name="c3p0.acquire_increment">5</property> 
    <property name="c3p0.idle_test_period">100</property> <!-- seconds --> 
    <property name="c3p0.max_size">20</property> 
    <property name="c3p0.max_statements">50</property> 
    <property name="c3p0.min_size">5</property> 
    <property name="c3p0.timeout">1800</property> <!-- seconds --> 
    <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
    <!--Basic user functionality-->

</session-factory>

but every time i run my project its giving error as Network error and connection refused. I refereed this link for the still giving errors. Below is my stack trace

java.sql.SQLException: Network error IOException: Connection refused: connect
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:434)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:183)
at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:134)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:183)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:172)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:152)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1074)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1061)
at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1796)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:635) Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:300)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:253)
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:329)

below is the image can anyone tell me where i am going wrong.

Answer 1

Are you sure that your server is listening on port 1433? To confirm that the actual problem is with Java (i.e. your configuration) run

telnet localhost 1433

If you get no answer then MS SQL is most likely not running on 1433. There is an option to use dynamic ports in MS SQL, make sure you didn't enable that.

http://frightanic.com/software-development/connecting-to-ms-sql-server-2012-express-through-jdbc-failed/:

The first hurdle was to learn that MS SQL Express by default uses dynamic ports. To connect in a TCP/IP fashion from Java you need to configure static ports manually.

Answer 2

Yes portNumber is Optional . The default is 1433. If you are using the default, you do not have to specify the port, nor its preceding ':', in the URL.

<property name="connection.pool_size">10</property>

It will allow only one connection at a time .I guess some where in your program you are trying to open another session .

Have a look on

Hibernate config connection pool size