Develop Reference

org.hibernate.TransactionException: Unable to locate JTA UserTransaction

I am writing my first example for Inserting Record using Hibernate Framework .
To start with I am trying to following instructions given at URL
You can see my code at GIT Hibernate Basic
When calling below piece of code
public Long saveEmployee(Employee emp){
Session session = new Configuration().configure().buildSessionFactory().openSession();
session.beginTransaction();
Long id = (Long) session.save(emp);
session.getTransaction().commit();
session.close();
return id;
}
hibernate.cfg.xml
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/test</property>
<property name="connection.username">root</property>
<property name="connection.password">root123</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">2</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">false</property>
<!-- validate | update | create | create-drop -->
<!-- validate: validate the schema, makes no changes to the database.
update: update the schema.
create: creates the schema, destroying previous data.
create-drop: drop the schema at the end of the session. -->
<property name="hbm2ddl.auto">validate</property>
<!-- added as suggested in below answer-->
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
<mapping resource="Employee.hbm.xml"/>
</session-factory>
</hibernate-configuration>
It throws org.hibernate.TransactionException: Unable to locate JTA UserTransaction
Details :
I am not deploying the application from any Application server I am running it as plan Java application.
I am using Hibernate 4.1
Is it neccessary to deploy it in Application Server ?
Whether we have to explicitly specify the JTAUsertransaction in Hibernate 4.1 version?
=============== Update ==============
With
hibernate.transaction.factory_class = org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory
Solved this error and I can execute the program .
But I still wanted to know the reason why its not working when using org.hibernate.transaction.JTATransactionFactory

When used
hibernate.transaction.factory_class = org.hibernate.engine.transaction.internal.jdbc.JdbcTransactionFactory
Solved this error and I can execute the program.
I have deliberately posted it as an answer so it would be helpful for someone.

You would be missing the JTA configuration in your hibernate config file
<property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>

Hibernate c3p0 configuration has no affect

I'm trying to add c3p0 connection pool to our existing hibernate configuration.
But it has no affect and hibernate still uses default pool.
Hibernate Configuration alone is working fine so i am absolutely sure no problem with it.
Wondering if someone here can point my mistake Or suggest how i can debug the problem ?
I do not use Spring framework.
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.ibm.db2.jcc.DB2Driver</property>
<property name="hibernate.connection.password">passwd</property>
<property name="hibernate.connection.url">jdbc:db2://server:port/database</property>
<property name="hibernate.connection.username">username</property>
<property name="hibernate.cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<property name="hibernate.connection.autocommit">false</property>
<property name="hibernate.current_session_context_class">thread</property>
<property name="hibernate.default_schema">DB Schema</property>
<property name="hibernate.dialect">org.hibernate.dialect.DB2Dialect</property>
<property name="hibernate.format_sql">false</property>
<property name="hibernate.max_fetch_depth">4</property>
<property name="hibernate.search.autoregister_listeners">false</property>
<property name="hibernate.show_sql">false</property>
<property name="hibernate.connection.isolation">1</property>
<property name="hibernate.jdbc.batch_size">50</property>
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">3000</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">900</property>
<mapping resource="table.hbm.xml" />
</session-factory>
</hibernate-configuration>
Here are the jars i have:
hibernate3.jar
hibernate-c3p0-3.5.0-Final.jar
Statements from the logs:
hibernate.cfg.Environment - Hibernate 3.5.0-Final
INFO ManagerConnectionProvider - Using Hibernate built-in connection pool (not for production use!)
INFO ManagerConnectionProvider - Hibernate connection pool size: 20

Try configuring a connection provider class from c3p0.
<property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
Also, it's better to add the hibernate configuration doctype, which will help in finding any typos.
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
UPDATE
You need to include the mchange library in your classpath. This link might helpful to you.

Hsql embedded swing app not run as executabe jar

Hi i created a Hibernate powered hsql embedded swing app..When i run eclipse juno version it run perfectly..After that i export as runnable jar file as run it.But does not retrieve,add data database...!!!
Project directory like
Project
..src
.....dao
.....daoimpl
.....sevice
.....serviceimpl
.....domain
.....main
.....hibernate.cfg.xml
..db/hsql/library
.............library.script
hibernate.cfg.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.HSQLDialect</property>
<!-- Database connection settings -->
<property name="hibernate.connection.driver_class">org.hsqldb.jdbcDriver</property>
<property name="hibernate.connection.url">jdbc:hsqldb:db/hsql/library;shutdown=true</property>
<property name="hibernate.connection.username">sa</property>
<property name="hibernate.connection.password">sa</property>
<property name="hibernate.dialect">org.hibernate.dialect.HSQLDialect</property>
<!-- JDBC connection pool (use the built-in one) -->
<property name="connection.pool_size">1</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property
name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>
<!-- disable batching so HSQLDB will propagate errors correctly. -->
<property name="jdbc.batch_size">0</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- List all the mapping documents we're using -->
<mapping class="com.habitz.librarymanagement.domain.Admin" />
<mapping class="com.habitz.librarymanagement.domain.Book" />
<mapping class="com.habitz.librarymanagement.domain.Category" />
<mapping class="com.habitz.librarymanagement.domain.Group" />
<mapping class="com.habitz.librarymanagement.domain.Issue" />
<mapping class="com.habitz.librarymanagement.domain.Member" />
</session-factory>
</hibernate-configuration>
Someone know please help...!!

This property creates a database relative to where the jar was executed from.
<property name="hibernate.connection.url">jdbc:hsqldb:db/hsql/library;shutdown=true</property>
Relative URL's do not work. Use an absolute URL. For example, you can use the user's directory for the database files, or a directory that your app is installed in.

Hibernate 4, EnversIntegrator could not be instantiated

I'm trying to set up Hibernate, and since 4.0.0 just came out I naturally decided to go with that. It seems that no matter what way I try to create a SessionFactory, it always leads to the same error:
Initial SessionFactory creation failed.java.util.ServiceConfigurationError: org.hibernate.integrator.spi.Integrator: Provider org.hibernate.envers.event.EnversIntegrator could not be instantiated: java.lang.ClassCastException: Cannot cast org.hibernate.envers.event.EnversIntegrator to org.hibernate.integrator.spi.Integrator
It seems like there is something wrong with my Hibernate configuration but I can't figure out what. Here's my hibernate.cfg.xml:
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql://192.168.0.17:5432/mydb</property>
<property name="connection.username">myusrname</property>
<property name="connection.password">mypasswd</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- c3p0 configuration -->
<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">false</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">create</property>
</session-factory>
</hibernate-configuration>
Does anyone spot anything out of the ordinary, or do you have other ideas?

I found no way to get Hibernate 4.0.0 CR4 working. Switching to 3.6.7 resolved the problem and works just fine. I conclude that there must be some bug in the release, and will file a bug report.

How to avoid stale MySQL/Hibernate connections (MySQLNonTransientConnectionException)

I have a Java webapp using Hibernate and MySQL. If the site isn't used for a few days, the MySQL connection goes stale, and I am met with the following exception:
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Connection.close() has already been called. Invalid operation in this state.
From experience using raw JDBC it is possible to configure the connection to attempt to recover from errors or stale connections, but I don't know how to do this using Hibernate. I am not explicitly calling close() anywhere (but I am betting Hibernate does somewhere deep down in its guts).
Does anybody know what I should do?

What connection pool are you using?
The Hibernate suggestion is not to use the built-in pooling, but use the application server datasource or something like Commons DBCP or C3PO.

I had that problem. Using connection pooling (c3p0) made it go away. It is also a good idea in general to use some connection pooling.

Thanks for the advice. For posterity's sake, I changed the hibernate.cfg.xml from the following:
<property name="connection.url">jdbc:mysql://localhost/FooDB</property>
<property name="connection.username">root</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="connection.password">secret</property>
<property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
... to the following:
<property name="connection.datasource">java:/comp/env/jdbc/FooDB</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
This also required adding a standard 'context' entry in my web app's context.xml:
<Resource name="jdbc/FooDB"
auth="Container"
type="javax.sql.DataSource"
maxActive="100"
maxIdle="30"
maxWait="10000"
username="root"
password="secret"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/ss?autoReconnect=true" />

We had a similar problem of hibernate mysql connection getting timed out.
So we tried C3P0, with the following configuration:
<property name=c3p0.acquire_increment>1</property>
<property name=c3p0.idle_test_period>3600</property>
<property name=c3p0.max_statements>0</property>
<property name=c3p0.min_size>1</property>
<property name=c3p0.timeout>3605</property>
<property name=hibernate.c3p0.preferredTestQuery>select 1;</property>
Hibernate connection_pool size was set to 1.
This made the timeout problem go away. But we started facing another problem. Long waits.
We have a service (servlet running on jboss), which receives something like 5-6 requests per second. Every request needs to connect to mysql through hibernate. Most of our requests do selects, with an insert/update every 5th-6th request. Normally the request serve time for us is 2-3ms for select and 40-50ms for insert/update. But, after using the above C3P0 configuration, we saw that every request completing after an update was taking almost 4-5 minutes! From our logs, it seemed that randomly a select request will get stuck and will be able to complete only after an update request was received and served.
Above problem goes away if we remove the C3P0 config. Can somebody suggest what we could be doing wrong?
Here is the complete hibernate config for reference:
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://xxx.xxx.xxx</property>
<property name="connection.username">xxx</property>
<property name="connection.password">xxx</property>
<property name="connection.pool_size">1</property>
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="current_session_context_class">thread</property>
<property name="hibernate.cache.use_query_cache">false</property>
<property name="hibernate.cache.use_second_level_cache">false</property>
<property name="show_sql">true</property>
<!-- Transaction isolation 2 = READ_COMMITTED -->
<property name="connection.isolation">2</property>
<property name="connection.autocommit">true</property>
<!-- configuration pool via c3p0-->
<property name="c3p0.acquire_increment">1</property>
<property name="c3p0.idle_test_period">3600</property> <!-- seconds -->
<property name="c3p0.max_size">1</property>
<property name="c3p0.max_statements">0</property>
<property name="c3p0.min_size">1</property>
<property name="c3p0.timeout">3605</property> <!-- seconds -->
<property name="hibernate.c3p0.preferredTestQuery">select 1;</property>
</session-factory>
</hibernate-configuration>

<property name="c3p0.acquire_increment">1</property>
<property name="c3p0.idle_test_period">120</property> <!-- seconds -->
<property name="c3p0.max_size">100</property>
<property name="c3p0.max_statements">0</property>
<property name="c3p0.min_size">10</property>
<property name="c3p0.timeout">180</property> <!-- seconds -->
override these settings on your config file. It ll helps to you.