Integrating oracle 11g with Grails and Hibernate - oracle

Question

I have created a simple grails 3 application. I am trying to connect it to an Oracle database in the datasource configuration.
When I run
SELECT * FROM V$VERSION
in sql developer, the following data is returned back about my database.
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
my application.yml file looks like this:
dataSources:
dataSource:
pooled: true
dialect: org.hibernate.dialect.Oracle10gDialect
driverClassName: 'oracle.jdbc.OracleDriver'
username: 'superCool'
password: 'password'
url: 'jdbc:oracle:thin:#127.0.0.1:1521:coolio'
dbCreate: ''
my build.gradle file contains these lines for hibernate and oracle dependencies.
dependencies {
(...)
compile "org.grails.plugins:hibernate:4.3.10.5"
(...)
compile "org.hibernate:hibernate-ehcache"
compile("com.oracle:ojdbc7:12.1.0.2")
}
My service file looks as follows:
class DatabaseService {
DataSource dataSource
public void testMyDb(User user) {
try {
registerUser(new Sql(dataSource), user)
} catch (SQLException e) {
LOGGER.error("unable to register the user", e)
throw e
}
}
public void registerUser(Sql sql, User user) {
sql.call("{call isertUser(?)}", [user.name])
}
If I remove the
compile "org.grails.plugins:hibernate:4.3.10.5"
from the build.gradle, I can run my integration tests and the database is successfully reached. If I keep it there, I get the following error:
ERROR DatabaseService - unable to register the user
java.sql.SQLRecoverableException: Closed Connection
at oracle.jdbc.driver.PhysicalConnection.getAutoCommit(PhysicalConnection.java:2254) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
UPDATE 1:
I updated my build.gradle file to reference
compile("com.oracle:ojdbc6:11.2.0.2")
as opposed to
compile("com.oracle:ojdbc7:12.1.0.2")
and the generated error now refers to the setter:
ERROR DatabaseService - unable to register the user
java.sql.SQLRecoverableException: Closed Connection
at oracle.jdbc.driver.PhysicalConnection.setAutoCommit(PhysicalConnection.java:2254) ~[ojdbc7-12.1.0.2.jar:12.1.0.2.0]
UPDATE 2:
I caught the SQLException and got the sql error code from it. The code returned back: 08003. According to https://docs.oracle.com/cd/E15817_01/appdev.111/b31228/appd.htm ,
08003 - connection does not exist
So at this point, I set the pooled flag to false in the datasource, and everything worked just fine. So the problem here is narrowed down to that. The plugin is not reacting well to the pooled properties.
I have issued the following sql commands to figure out the size of my pool:
SELECT name, value FROM v$parameter WHERE name = 'sessions';
that returns back 1524.
I have also issued the sql command to see the current allocated amount:
SELECT COUNT(*) FROM v$session;
which returns back 58.
I suppose the question now is, what is causing the pooled property to go crazy.

Answer 1

The solution to this was to disable my pooling. I cannot tell if its a bug, r why it fails, but it does. Thankfully for me, I used jndi lookup for my dataSources, so replacing that made the spark.
dataSources:
dataSource:
pooled: false
dialect: org.hibernate.dialect.Oracle10gDialect
driverClassName: 'oracle.jdbc.OracleDriver'
username: 'superCool'
password: 'password'
url: 'jdbc:oracle:thin:#127.0.0.1:1521:coolio'
dbCreate: ''