I'm developing a Play 2.3 Application with JPA/Hibernate and use a Heroku/ClearDB.com MySQL Database for this but after the application connects successfully to the DB I get following error:
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://eu-cdbr-west-01.cleardb.com:3306/heroku_b7ea7b2d2972532 Sleeping for 1000ms and trying again. Attempts left: 10. Exception: null.Message:User 'badd25925bdd5f' has exceeded the 'max_user_connections' resource (current value: 10)
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: User 'badd25925bdd5f' has exceeded the 'max_user_connections' resource (current value: 10)
I tried almost everything I saw on other posts but nothing helped... I think it has to do with pooling...?
persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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">
<persistence-unit name="defaultPersistenceUnit" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://eu-cdbr-west-01.cleardb.com:3306/heroku_b7ea7b2d2972532?reconnect=true"/>
<property name="javax.persistence.jdbc.user" value="badd25925bdd5f"/>
<property name="javax.persistence.jdbc.password" value="XXX"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.c3p0.min_size" value="2"/>
<property name="hibernate.c3p0.max_size" value="9"/>
<property name="hibernate.c3p0.timeout" value="300"/>
<property name="hibernate.c3p0.max_statements" value="50"/>
<property name="hibernate.c3p0.idle_test_period" value="3000"/>
</properties>
</persistence-unit>
</persistence>
application.conf (relevant part)
db.default.driver=com.mysql.jdbc.Driver
db.default.url="jdbc:mysql://eu-cdbr-west-01.cleardb.com:3306/heroku_b7ea7b2d2972532"
db.default.user="badd25925bdd5f"
db.default.password="XXX"
jpa.default=defaultPersistenceUnit
Thanks a lot for your help!
I don't know about using Hibernate, but with Ebean the connection pool by default is managed by BoneCP. Try to configure it in your application.conf:
# Max connections = partitionCount * maxConnPerPartition
db.default.partitionCount=2
db.default.maxConnectionsPerPartition=5
or in your persistence.xml:
<property name="bonecp.partitionCount" value="2" />
<property name="bonecp.maxConnectionsPerPartition" value="5" />
The error says that you are using more connections then your plan .So you can
Either upgrade you db plans see https://addons.heroku.com/cleardb#ignite
or
You can try scaling down your aplication see https://devcenter.heroku.com/articles/scaling
Solution to this problem (for Play 2.3) was to add the play-hikaricp library to the application.
Related
My jpa application was working fine (in fact, my 2 jpa applications) since I update my mac to Catalina (and restart it, of course).
Since then I got
org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator initiateService
WARN: HHH000342: Could not obtain connection to query metadata : null
Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]
...
Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
But from mySQL Workbench I can access my databases with no problem.
I've tried to reinstall mysql, even using brew to do it. Nothing works.
I changed nothing on my persistence.xml file nor my code.
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" 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">
<persistence-unit name="MyProject" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/myschema"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.password" value="MyPassword"/>
<property name="javax.persistence.schema-generation.database.action" value="update"/>
</properties>
</persistence-unit>
</persistence>
My mysql version is 8.0.19.
Thank you!
Next day update (28/4):
By now, I have:
1) Added this line to my persistence.xml:
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
As I got a new error...
Access denied for user 'root'#'localhost' (using password: YES)
2) Followed this instructions to set root password:
https://medium.com/#aungzanbaw/how-to-reset-root-user-password-in-mysql-8-0-a5c328d098a8
Now my new error is
Connection refused
Next next day update (29/4):
Today I stoped and started mysql from terminal:
sudo /usr/local/bin/mysql.server stop
sudo /usr/local/bin/mysql.server start
I then I got a new error
The server time zone value 'CEST' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
Let's continue my investigation!
Following this question: https://es.stackoverflow.com/questions/48935/configurar-zona-horaria-jdbc-driver-java/48946?newreg=494e1840d4404575a81dc4ec10200266
I modified persistence.xml:
So I got a
Table 'myschema.mytable' doesn't exist
error.
Finally I got it, not sure how... probably restarting from comand line.
Here my final persistence.xml:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" 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">
<persistence-unit name="MyProject" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/myschema?serverTimezone=UTC"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.password" value="MyPassword"/>
<property name="javax.persistence.schema-generation.database.action" value="update"/>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL8Dialect" />
</properties>
</persistence-unit>
</persistence>
Using MySQL8Dialect is necessary to be able to create the tables without that error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'type=MyISAM' at line 1
i'm having difficulty get Wildfly to use MySQL as a database, no connections are made. I have the following in the persistence.xml file:
<persistence version="2.1" 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">
<persistence-unit name="primary">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/X" />
<property name="javax.persistence.jdbc.user" value="X" />
<property name="javax.persistence.jdbc.password" value="X" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect" />
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.show_sql" value="true"/>
</properties>
</persistence-unit>
</persistence>
Changing e.g the dialect shows up in the logfiles, changing the persistence-unit name also affects the application so the persistence.xml is picked up except for the mysql part.
Any help appreciated,
--
Michel
I'm developing an application in a container managed environment (Java EE). Therefore, I shouldn't have to worry about handling and closing transactions. I simply inject the EntityManager:
#PersistenceContext(unitName = "WebApplication")
private EntityManager em;
And my corresponding persistence.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" 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">
<persistence-unit name="WebApplication" transaction-type="JTA">
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"></property>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://link-to-my-database.us-east-1.rds.amazonaws.com:3306/TestDB"></property>
<property name="javax.persistence.jdbc.user" value="admin"/>
<property name="javax.persistence.jdbc.password" value="password"/>
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create"/>
<property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
</properties>
</persistence-unit>
However, this does not work. According to the JPA 2.0 specification, javax.persistence.jdbc.driver is "attended for use in Java SE environments." (Section 8.2.1.9; page 317). And even the jta-datasource and non-jta-datasource only "name the data source in the local environment" (Section 8.2.1.5; page 313).
Then how can I connect to a remote database server? Obviously, I can explicitly create an EntityManager but then I would be responsible for handling the transactions, then what's the point of being in a container managed environment? If it's possible to connect to a remote database server using JPA and a container managed environment, can you provide an example on how to do so?
I'm new to glass-fish & persistence and while trying to run a query on MySQL database in my machine i get the following error:
Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: No database selected
Error Code: 1046
before running the server i made sure that the server configuration are done using this guide : mysql site manual for using connector with glassfish, and configured my persistence.xml like this:
<persistence version="2.0" 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">
<persistence-unit name="StudentRecipieWebsite" transaction-type="RESOURCE_LOCAL">
<non-jta-data-source>jdbc/mySql</non-jta-data-source>
<class>il.musehunter.studentRecipes.dbModel.Image</class>
<class>il.musehunter.studentRecipes.dbModel.Ingrediant</class>
<class>il.musehunter.studentRecipes.dbModel.Recipe</class>
<class>il.musehunter.studentRecipes.dbModel.User</class>
<properties>
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/recipes_data"/>
<property name="javax.persistence.jdbc.user" value="root"/>
<property name="javax.persistence.jdbc.password" value="moshe1475"/>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
<property name="eclipselink.jdbc.batch-writing" value="JDBC"/>
</properties>
</persistence-unit>
I'm really new to this and does not have a clue to what i should do next so any help would be very appreciated.
edit:
adding part of the domain.xml from my glassfish server :
<applications>
<application context-root="/StudentRecipieWebsite" location="${com.sun.aas.instanceRootURI}/applications/StudentRecipieWebsite/" name="StudentRecipieWebsite" object-type="user">
<property name="appLocation" value="${com.sun.aas.instanceRootURI}/applications/__internal/StudentRecipieWebsite/StudentRecipieWebsite.war"></property>
<property name="org.glassfish.ejb.container.application_unique_id" value="89812698949156864"></property>
<property name="org.glassfish.persistence.app_name_property" value="StudentRecipieWebsite"></property>
<property name="defaultAppName" value="StudentRecipieWebsite"></property>
<module name="StudentRecipieWebsite">
<engine sniffer="ejb"></engine>
<engine sniffer="security"></engine>
<engine sniffer="jpa"></engine>
<engine sniffer="web"></engine>
</module>
</application>
and:
<resources>
<jdbc-resource pool-name="__TimerPool" jndi-name="jdbc/__TimerPool" object-type="system-admin"></jdbc-resource>
<jdbc-resource pool-name="DerbyPool" jndi-name="jdbc/__default"></jdbc-resource>
<jdbc-connection-pool datasource-classname="org.apache.derby.jdbc.EmbeddedXADataSource" res-type="javax.sql.XADataSource" name="__TimerPool">
<property name="databaseName" value="${com.sun.aas.instanceRoot}/lib/databases/ejbtimer"></property>
<property name="connectionAttributes" value=";create=true"></property>
</jdbc-connection-pool>
<jdbc-connection-pool is-isolation-level-guaranteed="false" datasource-classname="org.apache.derby.jdbc.ClientDataSource" res-type="javax.sql.DataSource" name="DerbyPool">
<property name="PortNumber" value="1527"></property>
<property name="Password" value="APP"></property>
<property name="User" value="APP"></property>
<property name="serverName" value="localhost"></property>
<property name="DatabaseName" value="sun-appserv-samples"></property>
<property name="connectionAttributes" value=";create=true"></property>
</jdbc-connection-pool>
<jdbc-connection-pool datasource-classname="com.mysql.jdbc.jdbc2.optional.MysqlDataSource" res-type="javax.sql.DataSource" name="MySQLConnPool">
<property name="portNumber" value="3306"></property>
<property name="databaseName" value="recipes_data"></property>
<property name="serverName" value="localhost"></property>
<property name="user" value="root"></property>
<property name="password" value="moshe1475"></property>
<property name="URL" value="jdbc:mysql://:3306/"></property>
</jdbc-connection-pool>
<jdbc-resource pool-name="MySQLConnPool" description="" jndi-name="jdbc/mySql"></jdbc-resource></resources>
My first guess is that the connection URL in the data source definition is not quite right because "No database selected Error Code: 1046" is a MySQL error.
You do not need to configure the data source in persistence.xml if you have already defined a data source in your application server (which is the common way). Can you post the data source definition from your $GLASSFISH_HOME/glassfish/domains/$GLASSFISH_DOMAIN/config/domain.xml?
This is an example persistence.xml I took from an project of mine (more or less from the Netbeans template) that might help you:
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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">
<persistence-unit name="MyPU" transaction-type="JTA">
<provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
<jta-data-source>jdbc/sample</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="eclipselink.ddl-generation" value="create-tables"/>
</properties>
</persistence-unit>
</persistence>
Good luck!
Answering to the comment:
You need to add the database name to the URL:
<property name="URL" value="jdbc:mysql://nameOrIPOfYourServerOrLocalhost:3306/nameOfYourDatabase"></property>
That should resolve the problem.
I'm working in flex, blazeds,hibernate jpa, tomcat and mysql.
This is the problem that I face when I start the project:
05.06.2012 22:33:29.459 INFO org.hibernate.cfg.annotations.Version - Hibernate Annotations 3.4.0.GA
05.06.2012 22:33:29.479 INFO org.hibernate.cfg.Environment - Hibernate 3.3.2.GA
05.06.2012 22:33:29.482 INFO org.hibernate.cfg.Environment - hibernate.properties not found
05.06.2012 22:33:29.487 INFO org.hibernate.cfg.Environment - Bytecode provider name : javassist
05.06.2012 22:33:29.493 INFO org.hibernate.cfg.Environment - using JDK 1.4 java.sql.Timestamp handling
05.06.2012 22:33:29.645 INFO org.hibernate.annotations.common.Version - Hibernate Commons Annotations 3.1.0.GA
05.06.2012 22:33:29.650 INFO org.hibernate.ejb.Version - Hibernate EntityManager 3.4.0.GA
And this is my persistence.xml file under src/META-INF:
<persistence version="1.0"
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_1_0.xsd">
<persistence-unit name="consultant_db">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.adobe.demo.domain.Permission</class>
<class>com.adobe.demo.domain.Role</class>
<class>com.adobe.demo.domain.User</class>
<properties>
<property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
<property name="hibernate.connection.url" value="jdbc:mysql://localhost/consultant_db" />
<property name="hibernate.connection.username" value="root" />
<property name="hibernate.connection.password" value="" />
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect" />
<property name="hibernate.connection.pool_size" value="6" />
<property name="hibernate.connection.autoReconnect" value="true" />
<property name="hibernate.generate_statistics" value="false" />
<property name="hibernate.show_sql" value="true" />
<property name="hibernate.use_sql_comments" value="false" />
<property name="hibernate.hbm2ddl.auto" value="update" />
</properties>
</persistence-unit>
But if I delete the line: <class>com.adobe.demo.domain.User</class>
the other 2 tables will be created.
What should I do?
Here is a similar question. The OP was trying to create a "User" table, which failed. The OP was able to resolve the issue by annotation his User class with #Table(name = "\"user\"").
I also gave some tips on how to troubleshoot such problems.