I'm having problems with a server in Spring 4 and Mysql with Hibernate, Every first connection it is answering me org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection
My properties.xml is:
<persistence-unit name="defaultPersistenceUnit"
transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.url"
value="jdbc:mysql://mysql.******?reconnect=true" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.connection.password" value="****" />
<property name="hibernate.hbm2ddl.auto" value="update" />
<property name="hibernate.event.merge.entity_copy_observer"
value="allow" />
<property name="c3p0.acquire_increment" value="1" />
<property name="c3p0.idle_test_period" value="100" />
<property name="c3p0.max_size" value="100" />
<property name="c3p0.max_statements" value="0" />
<property name="c3p0.min_size" value="10" />
<property name="c3p0.timeout" value="100" />
<property name="hibernate.c3p0.preferredTestQuery" value="SELECT 1" />
</properties>
</persistence-unit>
Someone is having the same problem or knows a solution?
Thanks in advance!!!
Try with the following JDBC url
jdbc:mysql://localhost:3306/poc
poc is schema name
Related
In persistence.xml I am creating a database (in-memory database for test) like this:
<persistence-unit name="TestDatabase" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<jar-file>pathToMyJar.jar</jar-file>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.archive.autodetection" value="class, hbm" />
<property name="javax.persistence.schema-generation.database.action" value="create"/>
</properties>
</persistence-unit>
That works as expected but is slow. So I saved a sql-script for schema generation like this:
<persistence-unit name="TestDatabase" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<jar-file>pathToMyJar.jar</jar-file>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.archive.autodetection" value="class, hbm" />
<property name="javax.persistence.schema-generation.database.action" value="create"/>
<property name="javax.persistence.schema-generation.scripts.action" value="create"/>
<property name="javax.persistence.schema-generation.scripts.create-target" value="pathToSchemaGeneratonScript.sql"/>
</properties>
</persistence-unit>
And then tried to use it like this:
<persistence-unit name="TestDatabase" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" />
<property name="javax.persistence.jdbc.url" value="jdbc:h2:mem:test" />
<property name="javax.persistence.jdbc.driver" value="org.h2.Driver" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.show_sql" value="true" />
<property name="javax.persistence.schema-generation.database.action" value="create"/>
<property name="javax.persistence.schema-generation.create-source" value="script"/>
<property name="javax.persistence.schema-generation.create-script-source" value="pathToSchemaGeneratonScript.sql"/>
</properties>
</persistence-unit>
Since show_sql is set to true I can see that the script runs, e.g "create table xxx (...".
But no tables seems to exist, e.g:
entityManagerFactory = Persistence.createEntityManagerFactory("TestDatabase");
entityManager = entityManagerFactory.createEntityManager();
transaction = entityManager.getTransaction();
transaction.begin();
Query query = entityManager.createNativeQuery("insert into xxx (someColumns) values (someValues)");
query.executeUpdate();
Will result in "org.hibernate.engine.jdbc.spi.SqlExceptionHelper - Table "xxx" not found".
I have connected manually and verified that the tables are not there. I also applied the generated sql file manually and then the tables are created as expected.
I am trying to connect Postgres and mysql simultaneously in JPA with Ejb following is my persistence.xml and I am deploying the code in wildfly 10
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="pl4smsMYSQL-persistence">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<!-- <shared-cache-element>ENABLE_SELECTIVE</shared-cache-element> -->
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/newtable" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="root" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.format_sql" value="true" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="validate" />
<!-- Configuring Connection Pool -->
<property name="hibernate.c3p0.min_size" value="5" />
<property name="hibernate.c3p0.max_size" value="20" />
<property name="hibernate.c3p0.timeout" value="500" />
<property name="hibernate.c3p0.max_statements" value="50" />
<property name="hibernate.c3p0.idle_test_period" value="2000" />
<!-- <property name="hibernate.hbm2ddl.auto" value="create"/> -->
<!-- <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/newtable" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.connection.password" value="root" />
<property name="hibernate.listeners.envers.autoRegister"
value="false" />
<property name="hibernate.id.new_generator_mappings" value="true" />
<property name="hibernate.cache.use_second_level_cache"
value="false" />
<property name="show_sql" value="true"/>
<property name="hibernate.c3p0.min_size" value="50" /> <property
name="hibernate.c3p0.max_size" value="100" /> <property name="hibernate.c3p0.timeout"
value="100" /> <property name="hibernate.c3p0.idle_test_period" value="1"
/> <property name="hibernate.cache.use_query_cache" value="false" /> <property
name="javax.persistence.sharedCache.mode" value="ENABLE_SELECTIVE" /> <property
name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.EhCacheRegionFactory"
/> <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.SingletonEhCacheProvider"
/> <property name="hibernate.cache.use_query_cache" value="true" /> <property
name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory"
/> <property name="net.sf.ehcache.configurationResourceName" value="/ehcache.xml"
/>
<property name="hibernate.enable_lazy_load_no_trans" value="true" />
uncomment generate_statistics line to generate cache statistics
<property name="hibernate.generate_statistics" value="true" />
<property name="eclipselink.jdbc.batch-writing" value="JDBC" /> <property
name="eclipselink.jdbc.batch-writing.size" value="20" />
<property name="hibernate.hbm2ddl.auto" value="create"/> -->
</properties>
</persistence-unit>
<persistence-unit name="pl4sms-persistence">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<!-- <shared-cache-element>ENABLE_SELECTIVE</shared-cache-element> -->
<properties>
<property name="hibernate.connection.driver_class" value="org.postgresql.Driver" />
<property name="hibernate.connection.url" value="jdbc:postgresql://localhost:5432/pl4smstest" />
<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.connection.password" value="password" />
<property name="hibernate.listeners.envers.autoRegister"
value="false" />
<property name="hibernate.id.new_generator_mappings" value="true" />
<property name="hibernate.cache.use_second_level_cache"
value="false" />
<!-- <property name="hibernate.c3p0.min_size" value="50" /> <property
name="hibernate.c3p0.max_size" value="100" /> <property name="hibernate.c3p0.timeout"
value="100" /> <property name="hibernate.c3p0.idle_test_period" value="1"
/> <property name="hibernate.cache.use_query_cache" value="false" /> <property
name="javax.persistence.sharedCache.mode" value="ENABLE_SELECTIVE" /> <property
name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.EhCacheRegionFactory"
/> <property name="hibernate.cache.provider_class" value="net.sf.ehcache.hibernate.SingletonEhCacheProvider"
/> <property name="hibernate.cache.use_query_cache" value="true" /> <property
name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.SingletonEhCacheRegionFactory"
/> <property name="net.sf.ehcache.configurationResourceName" value="/ehcache.xml"
/>
<property name="hibernate.enable_lazy_load_no_trans" value="true" />
uncomment generate_statistics line to generate cache statistics
<property name="hibernate.generate_statistics" value="true" />
<property name="eclipselink.jdbc.batch-writing" value="JDBC" /> <property
name="eclipselink.jdbc.batch-writing.size" value="20" />
<property name="hibernate.hbm2ddl.auto" value="create"/> -->
</properties>
</persistence-unit>
</persistence>
and this is the pom.xml I am using
<dependency>
<groupId>org.apache.openejb</groupId>
<artifactId>tomee-embedded</artifactId>
<version>1.0.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.3.Final</version>
</dependency>
I am able to connect to postgres , but for mysql its giving wrong username and password error , i tried connecting mysql with commad prompt its get connected with same username and password. I tried removing Postgres connection and connected using only mysql still it gives the same error.
follwing is the error I am getting
Throwable while attempting to get a new connection: null: javax.resource.ResourceException: IJ031084: Unable to create connection
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:336)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:343)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:278)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.createConnectionEventListener(SemaphoreArrayListManagedConnectionPool.java:1289)
at org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedConnectionPool.getConnection(SemaphoreArrayListManagedConnectionPool.java:492)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getSimpleConnection(AbstractPool.java:627)
at org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:599)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:579)
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:430)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:737)
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:162)
at org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:74)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcServicesImpl.java:279)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:124)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.jboss.as.jpa.hibernate4.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:154)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117)
at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:665)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:182)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: org.h2.jdbc.JdbcSQLException: Wrong user name or password [28000-173]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:331)
at org.h2.message.DbException.get(DbException.java:171)
at org.h2.message.DbException.get(DbException.java:148)
at org.h2.message.DbException.get(DbException.java:137)
at org.h2.engine.Engine.validateUserAndPassword(Engine.java:302)
at org.h2.engine.Engine.createSessionAndValidate(Engine.java:147)
at org.h2.engine.Engine.createSession(Engine.java:122)
at org.h2.engine.Engine.createSession(Engine.java:28)
at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:313)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:105)
at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:90)
at org.h2.Driver.connect(Driver.java:73)
at org.jboss.jca.adapters.jdbc.local.LocalManagedConnectionFactory.createLocalManagedConnection(LocalManagedConnectionFactory.java:312)
... 32 more
A better idea will be to create two datasources in WildFly and then reference them in your persistence.xml files:
<persistence-unit name="pl4smsMYSQL-persistence" transaction-type="JTA">
<jta-data-source>java:jboss/datasources/MySqlDS</jta-data-source>
...
</persistence-unit>
<persistence-unit name="pl4sms-persistence" transaction-type="JTA">
<jta-data-source>java:jboss/datasources/PostgreSqlDS</jta-data-source>
...
</persistence-unit>
The great majority of your configuration properties then become redundant.
This will also have the benefit that your servers will be independently configured for each environment so you won't need different application builds for test and production.
Note that you can then also remove the driver jars from your application as they are separately deployed to the server.
We are making a web application where we are using PayPal for the users to make a subscription but we are having some problems. When we are creating accounts, logging in and doing various requests we have no problems but when we are making 4-7 simultaneous payments our connection pool is not behaving properly.
This is an image of the number of connections. You can see the number of connections spikes after a few payments. When we reset the server it drops down. The last time where the connections are high, you can see what's happening when the server gets to take care of the connection itself -
as you can see it takes hours to drop connections.
This is our persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"
version="2.1">
<persistence-unit name="up2u">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/up2u_user?autoReconnect=true&useUnicode=yes&characterEncoding=UTF-8" />
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.connection.username" value="up2u_user2"/>
<property name="hibernate.connection.password" value="e2f2c2ac87"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="hibernate.temp.use_jdbc_metadata_defaults" value="true"/>
<!-- Connectionpool-->
<property name="hibernate.connection.provider_class" value="org.hibernate.connection.C3P0ConnectionProvider" />
<property name="hibernate.c3p0.max_size" value="200" />
<property name="hibernate.c3p0.min_size" value="10" />
<property name="hibernate.c3p0.max_statements" value="400" />
<property name="hibernate.c3p0.acquireIncrement" value="10"/>
<property name="hibernate.c3p0.acquireRetryAttempts" value="3"/>
<property name="hibernate.c3p0.acquireRetryDelay" value="100"/>
<property name="hibernate.c3p0.checkoutTimeout" value="300" />
<property name="hibernate.c3p0.timeout" value="300" />
<property name="hibernate.c3p0.idle_test_period" value="300" />
<property name="hibernate.c3p0.idleConnectionTestPeriod" value="300" />
<property name="hibernate.c3p0.maxConnectionAge" value="300" />
<property name="hibernate.c3p0.maxStatementsPerConnection" value="2" />
<property name="hibernate.c3p0.testConnectionOnCheckin" value="true"/>
</properties>
</persistence-unit>
</persistence>
Why is the number connections not dropping when doing payments? The CPU and memory aren't working significantly more when doing payments and I can see nothing more than the connections building and a few more packets/second in firewall throughput.
We are using the bellow properties in our persistence.xml file.
<properties>
<property name="javax.persistence.jdbc.driver" value="oracle.jdbc.driver.OracleDriver" />
<property name="javax.persistence.jdbc.dialect" value="org.hibernate.dialect.OracleDialect" />
<property name="javax.persistence.jdbc.url" value="jdbc:oracle:thin:#XYZDB01:78111:TATAD1" />
<property name="javax.persistence.jdbc.user" value="admin" />
<property name="javax.persistence.jdbc.password" value="admin#123" />
<property name="javax.persistence.jdbc.Schema" value="CSMVC" />
</properties>
But I want to externalize the dynamic properties from persistence.xml something like bellow.
<properties>
<property name="javax.persistence.jdbc.driver" value="${db.driver}" />
<property name="javax.persistence.jdbc.dialect" value="${db.dialect}" />
<property name="javax.persistence.jdbc.url" value="${db.url}" />
<property name="javax.persistence.jdbc.user" value="${db.user}" />
<property name="javax.persistence.jdbc.password" value="${db.password}" />
<property name="javax.persistence.jdbc.Schema" value="${db.schema}" />
</properties>
Note: We are using openJpa as the JPA provider.
Normally, you would define your datasource in your container and have JPA look it up via JNDI. Are you running JPA in Spring/TomEE/Tomcat/Wildfly/Liberty or anything else?
I am developing an application where persistence is done via JPA and Hibernate 4.2.3. everything is working normally the first moment.
However when you spend a certain time (in my case one day) application aprensenta the following error.
ERROR: Communications link failure
The last packet successfully received from the server was 259.217.434 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.
Abaixo deixo meu persistence.xml...
<persistence-unit name="amh_sys" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/amh_sys" />
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.password" value="root"/>
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.format_sql" value="false" />
<property name="hibernate.use_sql_comments" value="false" />
<property name="hibernate.jdbc.wrap_result_sets" value="false" />
<property name="hibernate.hibernate.cache.use_query_cache" value="true" />
<property name="hibernate.c3p0.validate" value="true" />
</properties>
</persistence-unit>
I tried to configure using C3P0 connection pool, however had the same error ... Below configuration of C3P0.
<!-- Important -->
<property name="hibernate.connection.provider_class" value="org.hibernate.connection.C3P0ConnectionProvider" />
<property name="hibernate.c3p0.max_size" value="100" />
<property name="hibernate.c3p0.min_size" value="0" />
<property name="hibernate.c3p0.acquire_increment" value="1" />
<property name="hibernate.c3p0.idle_test_period" value="300" />
<property name="hibernate.c3p0.max_statements" value="0" />
<property name="hibernate.c3p0.timeout" value="100" />
I can force the error by changing the date on your computer, because MySQL gets the same date as a reference. I can not solve this problem, I hope someone here had the same problem trying to share your solution applied.
Felipe.
The MySQL server will timeout the connect if it has been idle for too long. http://dev.mysql.com/doc/refman/5.0/en/gone-away.html You can do use a scheduled query within the timeout to keep the connect active or re-establish the connection by closing and re-creating the EntityManager