Question

I have configured for the MySql database in grails by installing MySql in my system and placed its driver in X/lib directory(where X is my app name). I have changed the DataSource.groovy to conflict the changes. But when i run my app using the command grails run-app i’m getting an error as

 ERROR spring.BeanBuilder  - WARNING: Your cache provider is set to 'com.opensymphony.oscache.hibernate.OSCacheProvider' in DataSource.groovy, however the class for this provider cannot be found.

And Grails started to use its built in database..

How to get rid of this error?

DataSource.groovy Code is:

dataSource {
pooled = true
driverClassName = "com.mysql.jdbc.Driver"
username = "grails"
password = "server"
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = true
cache.provider_class =
'com.opensymphony.oscache.hibernate.OSCacheProvider'
}
// environment specific settings
environments {
development {
dataSource {
// one of 'create', 'create-drop','update'
dbCreate = "create-drop"
url = "jdbc:mysql://localhost:3306/racetrack_dev?autoreconnect=true"
}
}
test {
dataSource {
dbCreate = "update"
url = "jdbc:mysql://localhost:3306/racetrack_dev?autoreconnect=true"
}
}
production {
dataSource {
dbCreate = "update"
url = "jdbc:mysql://localhost:3306/racetrack_dev?autoreconnect=true"
}
}
}

Thanks in advance.

Answer 1

What version of grails are you using to create that DataSource.groovy file?

Grails 1.3.7 has the hibernate block as:

hibernate {
    cache.use_second_level_cache = true
    cache.use_query_cache = true
    cache.provider_class = 'net.sf.ehcache.hibernate.EhCacheProvider'
}

Which I think would explain your error message? (as you have set it up to use the old OSCacheProvider

---

Edit

These are the steps I just tried, and it all worked as expected:

1. Make a new database (I called mine ants)

2. Create the grails app

   grails create-app ants
   cd ants
   

3. Edit the grails-app/conf/BuildConfig.groovy file, and uncomment the lines:

   mavenCentral()
   

   and

   runtime 'mysql:mysql-connector-java:5.1.13'
   

4. Edit the file grails-app/conf/DataSource.groovy.

   Change the dataSource block to:

   dataSource {
       pooled = true
       driverClassName = "com.mysql.jdbc.Driver"
       username = ""
       password = ""
   }
   

   And the url (in each of the environments) to

       url = "jdbc:mysql://localhost:3306/ants?autoreconnect=true"
   

5. Create a domain class:

   grails create-domain-class ants.Runners
   

6. Run the app

   grails run-app
   

Then, when you inspect the DB, you will have a runners table

I am guessing that you are inspecting the wrong database (you have a dev, test, and main db set up, one for each environment)