Grails: SQLException: No suitable driver found for jdbc:oracle:thin - oracle

Question

When I run my app in GGTS 3.6.2 using Grails 2.4.3 I've got a message:
Caused by SQLException: No suitable driver found for jdbc:oracle:thin:#server:port/OCI
->> 689 | getConnection in java.sql.DriverManager
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 247 | getConnection in ''
| 18 | <init> . in awtool.Controller
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . in java.lang.Thread
Error |
Forked Grails VM exited with errorJava HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
I read many posts about this error and used some recommendations.
I added ojdbc6.jar to project /lib
also I added ojdbc6.jar at project Java Build Path using Add External JAR..
Java and Grails PATHs is OK
Is there is a way how I can resolve this problem ?
BuildConfig.groovy:
grails.servlet.version = "3.0" // Change depending on target container compliance (2.5 or 3.0)
grails.project.class.dir = "target/classes"
grails.project.test.class.dir = "target/test-classes"
grails.project.test.reports.dir = "target/test-reports"
grails.project.work.dir = "target/work"
grails.project.target.level = 1.6
grails.project.source.level = 1.6
//grails.project.war.file = "target/${appName}-${appVersion}.war"
grails.project.fork = [
// configure settings for compilation JVM, note that if you alter the Groovy version forked compilation is required
compile: [maxMemory: 256, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
// configure settings for the test-app JVM, uses the daemon by default
// test: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, daemon:true],
// configure settings for the run-app JVM
run: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
// configure settings for the run-war JVM
war: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256, forkReserve:false],
// configure settings for the Console UI JVM
console: [maxMemory: 768, minMemory: 64, debug: false, maxPerm: 256]
]
grails.project.dependency.resolver = "maven" // or ivymaven
grails.project.dependency.resolution = {
// inherit Grails' default dependencies
inherits("global") {
// specify dependency exclusions here; for example, uncomment this to disable ehcache:
// excludes 'ehcache'
}
log "error" // log level of Ivy resolver, either 'error', 'warn', 'info', 'debug' or 'verbose'
checksums true // Whether to verify checksums on resolve
legacyResolve false // whether to do a secondary resolve on plugin installation, not advised and here for backwards compatibility
repositories {
inherits true // Whether to inherit repository definitions from plugins
grailsPlugins()
grailsHome()
mavenLocal()
grailsCentral()
mavenCentral()
// uncomment these (or add new ones) to enable remote dependency resolution from public Maven repositories
// mavenRepo "http://repository.codehaus.org"
// mavenRepo "http://download.java.net/maven/2/"
// mavenRepo "http://repository.jboss.com/maven2/"
mavenRepo "http://repo.spring.io/milestone/"
}
dependencies {
// specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
runtime 'mysql:mysql-connector-java:5.1.34'
// runtime "com.oracle:ojdbc6:11.2.0.4"
// runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
test "org.grails:grails-datastore-test-support:1.0-grails-2.4"
}
plugins {
// plugins for the build system only
build ":tomcat:7.0.55"
// plugins for the compile step
compile ":scaffolding:2.1.2"
compile ':cache:1.1.7'
compile ":asset-pipeline:1.9.6"
compile ":spring-security-core:2.0-RC4"
compile ":spring-security-ldap:2.0-RC2"
compile ":force-ssl:1.0.0"
// plugins needed at runtime but not for compilation
runtime ":hibernate4:4.3.5.5" // or ":hibernate:3.6.10.17"
runtime ":database-migration:1.4.0"
runtime ":jquery:1.11.1"
// Uncomment these to enable additional asset-pipeline capabilities
//compile ":sass-asset-pipeline:1.9.0"
//compile ":less-asset-pipeline:1.10.0"
//compile ":coffee-asset-pipeline:1.8.0"
//compile ":handlebars-asset-pipeline:1.3.0.3"
}
}
grails.server.port.http=8088
DataSource.groovy
import groovy.sql.*
dataSource {
pooled = true
dialect = "org.hibernate.dialect.MySQL5InnoDBDialect"
driverClassName = "com.mysql.jdbc.Driver"
username = "login"
password = "pass"
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory'
}
// environment specific settings
environments {
development {
dataSource {
dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
url = "jdbc:mysql://server:port/login"
}
}
test {
dataSource {
dbCreate = "update"
url = "jdbc:mysql://server:port/login"
}
}
production {
dataSource {
dbCreate = "update"
url = "jdbc:mysql://server:port/login"
}
}
}

Answer 1

"Add External JAR.." and other ways of adding to the IDE classpath aren't useful when using Grails - the IDEs build their classpaths from the Grails dependencies, so you only need to ensure that Grails has access.
When adding jars to the lib dir (which should be avoided in general, but is needed in this case because Oracle annoyingly refuses to put their driver jars in public repos) you need to run
grails compile --refresh-dependencies
to get it added to the classpath - Grails hasn't had auto-detection of jars in /lib for a while.
Once you do that, if you need the jar for compilation (you don't in this case) then refresh the IDE from Grails. In GGTS/STS you can do this by right-clicking the project root node in the tree on the left and selecting Grails Tools | Refresh Dependencies.

Answer 2

In addition to Burt's answer explaining how to get Grails to find your Oracle library, you need to change DataSource.groovy to connect to an Oracle database (it's currently configured for MySQL). You need to change it to something like:
dataSource {
pooled = true
driverClassName = "oracle.jdbc.driver.OracleDriver"
dialect = "org.hibernate.dialect.Oracle10gDialect"
dbCreate = "update"
url = 'jdbc:oracle:thin:#localhost:1521:mydb'
username = "root"
password = "password"
properties {
// See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
jmxEnabled = false
initialSize = 5
maxActive = 50
minIdle = 5
maxIdle = 25
maxWait = 10000
maxAge = 10 * 60000
timeBetweenEvictionRunsMillis = 5000
minEvictableIdleTimeMillis = 60000
validationQuery = "select 1 from dual"
validationQueryTimeout = 3
validationInterval = 15000
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
jdbcInterceptors = "ConnectionState;StatementCache(max=200)"
defaultTransactionIsolation = Connection.TRANSACTION_READ_COMMITTED
}
}
hibernate {
flush.mode = 'manual'
cache.use_second_level_cache = true
cache.use_query_cache = true
cache.region.factory_class = "net.sf.ehcache.hibernate.EhCacheRegionFactory"
}
Replace mydb, root, and password with the name of your schema, and the username and password you'll use to access it.