abhishek bafna created OPENJPA-2638:
---------------------------------------
Summary: mysql master/slave replication configuration with openjpa
DataSource
Key: OPENJPA-2638
URL: https://issues.apache.org/jira/browse/OPENJPA-2638
Project: OpenJPA
Issue Type: Bug
Components: jpa
Affects Versions: 2.2.2
Reporter: abhishek bafna
Here is the setup/code I am using to connect with mysql in replication mode,
using openjpa datasource. How do I solve this problem.
mysql expects the master/slave hosts in a comma (,) separated format.
[Configuring Master/Slave
Replication|https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-master-slave-replication-connection.html]
While the *openjpa.ConnectionProperties* is also comma (,) separated and mapped
to the DataSource instance. [opejpa
JDBC|http://openjpa.apache.org/builds/1.2.3/apache-openjpa/docs/ref_guide_dbsetup.html].
That is reason, url which reaches to the mysql have only one host. I have
attached a debugging screen shot.
{code}
String driver ="com.mysql.jdbc.ReplicationDriver";
String url = "jdbc:mysql:replication://master:3306,slave:3306/oozie";
String user = "abc";
String password = "123";
String connProps = "DriverClassName={0},Url={1},Username={2},Password={3}";
public void method() {
connProps = MessageFormat.format(connProps, driver, url, user,
password);
Properties props = new Properties();
props.setProperty("openjpa.ConnectionProperties", connProps);
props.setProperty("openjpa.ConnectionDriverName",
"org.apache.commons.dbcp.BasicDataSource");
EntityManagerFactory factory =
Persistence.createEntityManagerFactory("mysql", props);
EntityManager manager = factory.createEntityManager();
}
{code}
Exception:
{noformat}
Exception in thread "main" <openjpa-2.4.1-r422266:1730418 fatal general error>
org.apache.openjpa.persistence.PersistenceException: Cannot create
PoolableConnectionFactory (Must specify at least one slave host to connect to
for master/slave replication load-balancing functionality)
at
org.apache.openjpa.jdbc.sql.DBDictionaryFactory.newDBDictionary(DBDictionaryFactory.java:106)
at
org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getDBDictionaryInstance(JDBCConfigurationImpl.java:603)
at
org.apache.openjpa.jdbc.meta.MappingRepository.endConfiguration(MappingRepository.java:1520)
at
org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:533)
at
org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:458)
at
org.apache.openjpa.lib.conf.PluginValue.instantiate(PluginValue.java:121)
at
org.apache.openjpa.conf.MetaDataRepositoryValue.instantiate(MetaDataRepositoryValue.java:68)
at
org.apache.openjpa.lib.conf.ObjectValue.instantiate(ObjectValue.java:83)
at
org.apache.openjpa.conf.OpenJPAConfigurationImpl.newMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:967)
at
org.apache.openjpa.conf.OpenJPAConfigurationImpl.getMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:958)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:642)
at
org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:202)
at
org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:154)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:226)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:153)
at
org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:59)
at ExampleJPA.method(ExampleJPA.java:22)
at ExampleJPA.main(ExampleJPA.java:27)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create
PoolableConnectionFactory (Must specify at least one slave host to connect to
for master/slave replication load-balancing functionality)
at
org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549)
at
org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388)
at
org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044)
at
org.apache.openjpa.lib.jdbc.DelegatingDataSource.getConnection(DelegatingDataSource.java:110)
at
org.apache.openjpa.lib.jdbc.DecoratingDataSource.getConnection(DecoratingDataSource.java:86)
at
org.apache.openjpa.jdbc.sql.DBDictionaryFactory.newDBDictionary(DBDictionaryFactory.java:90)
... 22 more
Caused by: java.sql.SQLException: Must specify at least one slave host to
connect to for master/slave replication load-balancing functionality
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:896)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:885)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:860)
at
com.mysql.jdbc.NonRegisteringDriver.connectReplicationConnection(NonRegisteringDriver.java:414)
at
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:313)
at
org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
at
org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582)
at
org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556)
at
org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545)
... 27 more
{noformat}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
