使用 Grail 2.4.4 配置 MySQL 数据库（无法创建池的初始连接）
Configuring a MySQL Database using Grail 2.4.4 (Unable to create initial connections of pool)
我真的是 Grails 技术的初学者。我为 Windows 64 位安装了 IDE Groovy/Grails Tool Suite™（GGTS，Grails 2.4.4）。
有关 JDK 和 Grails 的环境路径已正确更新。
我创建了一个名为 'test' 的新项目，添加了一个名为 'test.User' 的新域 class，如下所示：
package test
class User {
Integer id
String firstName
String lastName
static constraints = {
id(blank:false, unique:true)
firstName(blank:false)
lastName(blank:false)
}
}
应用静态脚手架生成相应的 UserController 和与 CRUD 操作关联的视图。
为了检查我的数据模型是否与 H2 数据库一起工作，我对 DataSource.groovy 文件进行了一些更新并且它有效：我添加了一个新用户抛出应用程序，当我 运行在我的 table 用户（使用 grails dbconsole）上的命令 SELECT* 并且我显示了我的新用户条目。所以，到此为止一切正常！
但现在我想使用不同的 JDBC 连接器将我的应用程序连接到另一个 SQL 数据库。我选择了（为了兼容性）在我的 BuildConfig.groovy 文件中提出的那个并取消注释：
runtime mysql:mysql-connector-java:5.1.29
当我 运行 应用程序 'run-app'（默认情况下我认为我们处于开发环境中）时，我注意到依赖项 mysql-connector-java-5.1。 29.jar 已添加到我的 .m2 目录 (C:\Users\my_user_name.m2\repository\mysql\mysql-connector-java.1.29)。所以我认为依赖项已在 Grails 中的一种 MAVEN 文件中正确注册。但是该文件不会出现在 ivy-cache 目录中。正常吗？
我的BuildConfig.groovy文件内容：
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 ivy
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/"
}
dependencies {
// specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
runtime 'mysql:mysql-connector-java:5.1.29'
// runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
//test "org.grails:grails-datastore-test-support:1.0.2-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:1.1.8'
compile ":asset-pipeline:1.9.9"
// plugins needed at runtime but not for compilation
runtime ":hibernate4:4.3.6.1" // or ":hibernate:3.6.10.18"
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"
}
}
关于 DataSource.groovy 文件，我替换了有关驱动程序名称的行：
driverClassName = "org.h2.Driver"
来自
driverClassName = "com.mysql.jdbc.Driver"
并且对于每个环境（我知道我只使用开发环境，但这只是为了避免一些错误）我替换了以下几行：
url = "jdbc:h2:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
来自
url = "jdbc:mysql://localhost/test"
我还在默认用户名和密码（作为 root 用户）+ 驱动程序 class 名称下方添加如下（再次针对每个环境）：
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
这是我的 DataSource.groovy 文件内容：
dataSource {
pooled = true
jmxExport = true
//driverClassName = "org.h2.Driver"
driverClassName = "com.mysql.jdbc.Driver"
username = "sa"
password = ""
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
// cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory' // Hibernate 3
cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory' // Hibernate 4
singleSession = true // configure OSIV singleSession mode
flush.mode = 'manual' // OSIV session flush mode outside of transactional context
}
// environment specific settings
environments {
development {
dataSource {
dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
//url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
test {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
production {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
properties {
// See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
jmxEnabled = true
initialSize = 5
maxActive = 50
minIdle = 5
maxIdle = 25
maxWait = 10000
maxAge = 10 * 60000
timeBetweenEvictionRunsMillis = 5000
minEvictableIdleTimeMillis = 60000
validationQuery = "SELECT 1"
validationQueryTimeout = 3
validationInterval = 15000
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
jdbcInterceptors = "ConnectionState"
defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
}
}
}
}
现在，当我 运行 应用程序时出现以下错误：
ERROR pool.ConnectionPool - Unable to create initial connections of pool.
这是整个错误堆栈：
2016-08-23 16:18:58,040 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool.
Message: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . . . . . . . . . . . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly . . . . . . in ''
| 2320 | createNewIO in ''
| 834 | <init> . . . . . . . . . . . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance . . . . . . in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . . . . . . . . . . . in com.mysql.jdbc.NonRegisteringDriver
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . . . . . . . . . . . in java.lang.Thread
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 345 | doConnect in java.net.AbstractPlainSocketImpl
| 206 | connectToAddress . . . . . . in ''
| 188 | connect in ''
| 172 | connect . . . . . . . . . . . in java.net.PlainSocketImpl
| 392 | connect in java.net.SocksSocketImpl
| 589 | connect . . . . . . . . . . . in java.net.Socket
| 538 | connect in ''
| 434 | <init> . . . . . . . . . . . in ''
| 244 | <init> in ''
| 256 | connect . . . . . . . . . . . in com.mysql.jdbc.StandardSocketFactory
| 308 | <init> in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO . . . . . . . . . in ''
| 834 | <init> in ''
| 46 | <init> . . . . . . . . . . . in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 347 | connect in com.mysql.jdbc.NonRegisteringDriver
| 266 | run . . . . . . . . . . . . . in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Error |
2016-08-23 16:19:00,132 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool.
Message: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . . . . . . . . . . . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly . . . . . . in ''
| 2320 | createNewIO in ''
| 834 | <init> . . . . . . . . . . . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance . . . . . . in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . . . . . . . . . . . in com.mysql.jdbc.NonRegisteringDriver
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . . . . . . . . . . . in java.lang.Thread
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 345 | doConnect in java.net.AbstractPlainSocketImpl
| 206 | connectToAddress . . . . . . in ''
| 188 | connect in ''
| 172 | connect . . . . . . . . . . . in java.net.PlainSocketImpl
| 392 | connect in java.net.SocksSocketImpl
| 589 | connect . . . . . . . . . . . in java.net.Socket
| 538 | connect in ''
| 434 | <init> . . . . . . . . . . . in ''
| 244 | <init> in ''
| 256 | connect . . . . . . . . . . . in com.mysql.jdbc.StandardSocketFactory
| 308 | <init> in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO . . . . . . . . . in ''
| 834 | <init> in ''
| 46 | <init> . . . . . . . . . . . in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 347 | connect in com.mysql.jdbc.NonRegisteringDriver
| 266 | run . . . . . . . . . . . . . in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Error |
2016-08-23 16:19:02,194 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool.
Message: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . . . . . . . . . . . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly . . . . . . in ''
| 2320 | createNewIO in ''
| 834 | <init> . . . . . . . . . . . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance . . . . . . in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . . . . . . . . . . . in com.mysql.jdbc.NonRegisteringDriver
| 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
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
Error |
2016-08-23 16:19:02,205 [localhost-startStop-1] ERROR context.GrailsContextLoaderListener - Error initializing the application: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Message: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 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
Caused by BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO in ''
| 834 | <init> . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . in com.mysql.jdbc.NonRegisteringDriver
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . in java.lang.Thread
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 345 | doConnect in java.net.AbstractPlainSocketImpl
| 206 | connectToAddress in ''
| 188 | connect in ''
| 172 | connect . in java.net.PlainSocketImpl
| 392 | connect in java.net.SocksSocketImpl
| 589 | connect . in java.net.Socket
| 538 | connect in ''
| 434 | <init> . in ''
| 244 | <init> in ''
| 256 | connect . in com.mysql.jdbc.StandardSocketFactory
| 308 | <init> in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO in ''
| 834 | <init> in ''
| 46 | <init> . in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect in com.mysql.jdbc.NonRegisteringDriver
| 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
Grails 似乎找不到驱动程序或类似的东西。但是我们已经看到 JAR 文件已在 .m2 目录中注册。我想知道一件事：这个 JAR 文件是否需要出现在 Grails 依赖项列表中：
整个列表不在图片上，但文件没有出现在列表中。正常吗？该文件是否必须只出现在 .m2 目录中（在常春藤缓存中，这是相同的，该文件不存在）？当我 运行 应用程序时，你认为依赖项可用吗？ Grails 是否识别驱动程序抛出 class 路径？
我真的迷路了
非常感谢您的帮助。
但我会说按照以下步骤一一进行：
检查您的机器上是否安装了 mysql 服务器。情况可能是您只安装了 Mysql-client。
在您的 DataSource.groovy 中，我看到很多东西丢失或配置不正确。我注意到的很少是：
a) 缺少方言配置
b) 缺少端口号连接到服务器
以下已更正DataSource.groovy
dataSource {
pooled = true
jmxExport = true
//driverClassName = "org.h2.Driver"
driverClassName = "com.mysql.jdbc.Driver"
dialect = "org.hibernate.dialect.MySQL5InnoDBDialect"
username = "sa"
password = ""
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
// cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory' // Hibernate 3
cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory' // Hibernate 4
singleSession = true // configure OSIV singleSession mode
flush.mode = 'manual' // OSIV session flush mode outside of transactional context
}
// environment specific settings
environments {
development {
dataSource {
dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
//url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost:3306/test"//you had a missing port here
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
test {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
production {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
properties {
// See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
jmxEnabled = true
initialSize = 5
maxActive = 50
minIdle = 5
maxIdle = 25
maxWait = 10000
maxAge = 10 * 60000
timeBetweenEvictionRunsMillis = 5000
minEvictableIdleTimeMillis = 60000
validationQuery = "SELECT 1"
validationQueryTimeout = 3
validationInterval = 15000
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
jdbcInterceptors = "ConnectionState"
defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
}
}
}
}
希望对您有所帮助！！如果您在新 DataSource.groovy.
之后遇到任何问题，请告诉我
我真的是 Grails 技术的初学者。我为 Windows 64 位安装了 IDE Groovy/Grails Tool Suite™（GGTS，Grails 2.4.4）。
有关 JDK 和 Grails 的环境路径已正确更新。
我创建了一个名为 'test' 的新项目，添加了一个名为 'test.User' 的新域 class，如下所示：
package test
class User {
Integer id
String firstName
String lastName
static constraints = {
id(blank:false, unique:true)
firstName(blank:false)
lastName(blank:false)
}
}
应用静态脚手架生成相应的 UserController 和与 CRUD 操作关联的视图。
为了检查我的数据模型是否与 H2 数据库一起工作，我对 DataSource.groovy 文件进行了一些更新并且它有效：我添加了一个新用户抛出应用程序，当我 运行在我的 table 用户（使用 grails dbconsole）上的命令 SELECT* 并且我显示了我的新用户条目。所以，到此为止一切正常！
但现在我想使用不同的 JDBC 连接器将我的应用程序连接到另一个 SQL 数据库。我选择了（为了兼容性）在我的 BuildConfig.groovy 文件中提出的那个并取消注释：
runtime mysql:mysql-connector-java:5.1.29
当我 运行 应用程序 'run-app'（默认情况下我认为我们处于开发环境中）时，我注意到依赖项 mysql-connector-java-5.1。 29.jar 已添加到我的 .m2 目录 (C:\Users\my_user_name.m2\repository\mysql\mysql-connector-java.1.29)。所以我认为依赖项已在 Grails 中的一种 MAVEN 文件中正确注册。但是该文件不会出现在 ivy-cache 目录中。正常吗？
我的BuildConfig.groovy文件内容：
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 ivy
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/"
}
dependencies {
// specify dependencies here under either 'build', 'compile', 'runtime', 'test' or 'provided' scopes e.g.
runtime 'mysql:mysql-connector-java:5.1.29'
// runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
//test "org.grails:grails-datastore-test-support:1.0.2-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:1.1.8'
compile ":asset-pipeline:1.9.9"
// plugins needed at runtime but not for compilation
runtime ":hibernate4:4.3.6.1" // or ":hibernate:3.6.10.18"
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"
}
}
关于 DataSource.groovy 文件，我替换了有关驱动程序名称的行：
driverClassName = "org.h2.Driver"
来自
driverClassName = "com.mysql.jdbc.Driver"
并且对于每个环境（我知道我只使用开发环境，但这只是为了避免一些错误）我替换了以下几行：
url = "jdbc:h2:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
来自
url = "jdbc:mysql://localhost/test"
我还在默认用户名和密码（作为 root 用户）+ 驱动程序 class 名称下方添加如下（再次针对每个环境）：
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
这是我的 DataSource.groovy 文件内容：
dataSource {
pooled = true
jmxExport = true
//driverClassName = "org.h2.Driver"
driverClassName = "com.mysql.jdbc.Driver"
username = "sa"
password = ""
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
// cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory' // Hibernate 3
cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory' // Hibernate 4
singleSession = true // configure OSIV singleSession mode
flush.mode = 'manual' // OSIV session flush mode outside of transactional context
}
// environment specific settings
environments {
development {
dataSource {
dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
//url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
test {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
production {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
properties {
// See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
jmxEnabled = true
initialSize = 5
maxActive = 50
minIdle = 5
maxIdle = 25
maxWait = 10000
maxAge = 10 * 60000
timeBetweenEvictionRunsMillis = 5000
minEvictableIdleTimeMillis = 60000
validationQuery = "SELECT 1"
validationQueryTimeout = 3
validationInterval = 15000
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
jdbcInterceptors = "ConnectionState"
defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
}
}
}
}
现在，当我 运行 应用程序时出现以下错误：
ERROR pool.ConnectionPool - Unable to create initial connections of pool.
这是整个错误堆栈：
2016-08-23 16:18:58,040 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool.
Message: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . . . . . . . . . . . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly . . . . . . in ''
| 2320 | createNewIO in ''
| 834 | <init> . . . . . . . . . . . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance . . . . . . in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . . . . . . . . . . . in com.mysql.jdbc.NonRegisteringDriver
| 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
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 345 | doConnect in java.net.AbstractPlainSocketImpl
| 206 | connectToAddress . . . . . . in ''
| 188 | connect in ''
| 172 | connect . . . . . . . . . . . in java.net.PlainSocketImpl
| 392 | connect in java.net.SocksSocketImpl
| 589 | connect . . . . . . . . . . . in java.net.Socket
| 538 | connect in ''
| 434 | <init> . . . . . . . . . . . in ''
| 244 | <init> in ''
| 256 | connect . . . . . . . . . . . in com.mysql.jdbc.StandardSocketFactory
| 308 | <init> in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO . . . . . . . . . in ''
| 834 | <init> in ''
| 46 | <init> . . . . . . . . . . . in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 347 | connect in com.mysql.jdbc.NonRegisteringDriver
| 266 | run . . . . . . . . . . . . . in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Error |
2016-08-23 16:19:00,132 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool.
Message: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . . . . . . . . . . . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly . . . . . . in ''
| 2320 | createNewIO in ''
| 834 | <init> . . . . . . . . . . . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance . . . . . . in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . . . . . . . . . . . in com.mysql.jdbc.NonRegisteringDriver
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . . . . . . . . . . . in java.lang.Thread
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 345 | doConnect in java.net.AbstractPlainSocketImpl
| 206 | connectToAddress . . . . . . in ''
| 188 | connect in ''
| 172 | connect . . . . . . . . . . . in java.net.PlainSocketImpl
| 392 | connect in java.net.SocksSocketImpl
| 589 | connect . . . . . . . . . . . in java.net.Socket
| 538 | connect in ''
| 434 | <init> . . . . . . . . . . . in ''
| 244 | <init> in ''
| 256 | connect . . . . . . . . . . . in com.mysql.jdbc.StandardSocketFactory
| 308 | <init> in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO . . . . . . . . . in ''
| 834 | <init> in ''
| 46 | <init> . . . . . . . . . . . in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance . . . . . . . . . in com.mysql.jdbc.ConnectionImpl
| 347 | connect in com.mysql.jdbc.NonRegisteringDriver
| 266 | run . . . . . . . . . . . . . in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Error |
2016-08-23 16:19:02,194 [localhost-startStop-1] ERROR pool.ConnectionPool - Unable to create initial connections of pool.
Message: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . . . . . . . . . . . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly . . . . . . in ''
| 2320 | createNewIO in ''
| 834 | <init> . . . . . . . . . . . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance . . . . . . in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . . . . . . . . . . . in com.mysql.jdbc.NonRegisteringDriver
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker . . . . . . . . . . in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . . . . . . . . . . . in java.lang.Thread
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
Error |
2016-08-23 16:19:02,205 [localhost-startStop-1] ERROR context.GrailsContextLoaderListener - Error initializing the application: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Message: Error creating bean with name 'transactionManagerPostProcessor': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Line | Method
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'transactionManager': Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'sessionFactory': Cannot resolve reference to bean 'hibernateProperties' while setting bean property 'hibernateProperties'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'hibernateProperties': Cannot resolve reference to bean 'dialectDetector' while setting bean property 'properties' with key [hibernate.dialect]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by BeanCreationException: Error creating bean with name 'dialectDetector': Invocation of init method failed; nested exception is org.springframework.jdbc.support.MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by MetaDataAccessException: Error while extracting DatabaseMetaData; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 266 | run in java.util.concurrent.FutureTask
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run in java.lang.Thread
Caused by CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
->> 411 | handleNewInstance in com.mysql.jdbc.Util
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 1129 | createCommunicationsException in com.mysql.jdbc.SQLError
| 358 | <init> . in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO in ''
| 834 | <init> . in ''
| 46 | <init> in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect . in com.mysql.jdbc.NonRegisteringDriver
| 266 | run in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run in java.util.concurrent.ThreadPoolExecutor$Worker
^ 745 | run . . . in java.lang.Thread
Caused by ConnectException: Connection refused: connect
->> 79 | socketConnect in java.net.DualStackPlainSocketImpl
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
| 345 | doConnect in java.net.AbstractPlainSocketImpl
| 206 | connectToAddress in ''
| 188 | connect in ''
| 172 | connect . in java.net.PlainSocketImpl
| 392 | connect in java.net.SocksSocketImpl
| 589 | connect . in java.net.Socket
| 538 | connect in ''
| 434 | <init> . in ''
| 244 | <init> in ''
| 256 | connect . in com.mysql.jdbc.StandardSocketFactory
| 308 | <init> in com.mysql.jdbc.MysqlIO
| 2498 | coreConnect in com.mysql.jdbc.ConnectionImpl
| 2535 | connectOneTryOnly in ''
| 2320 | createNewIO in ''
| 834 | <init> in ''
| 46 | <init> . in com.mysql.jdbc.JDBC4Connection
| 411 | handleNewInstance in com.mysql.jdbc.Util
| 416 | getInstance in com.mysql.jdbc.ConnectionImpl
| 347 | connect in com.mysql.jdbc.NonRegisteringDriver
| 266 | run . . . in java.util.concurrent.FutureTask
| 1142 | runWorker in java.util.concurrent.ThreadPoolExecutor
| 617 | run . . . in java.util.concurrent.ThreadPoolExecutor$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
Grails 似乎找不到驱动程序或类似的东西。但是我们已经看到 JAR 文件已在 .m2 目录中注册。我想知道一件事：这个 JAR 文件是否需要出现在 Grails 依赖项列表中：
整个列表不在图片上，但文件没有出现在列表中。正常吗？该文件是否必须只出现在 .m2 目录中（在常春藤缓存中，这是相同的，该文件不存在）？当我 运行 应用程序时，你认为依赖项可用吗？ Grails 是否识别驱动程序抛出 class 路径？
我真的迷路了
非常感谢您的帮助。
但我会说按照以下步骤一一进行：
检查您的机器上是否安装了 mysql 服务器。情况可能是您只安装了 Mysql-client。
在您的 DataSource.groovy 中，我看到很多东西丢失或配置不正确。我注意到的很少是： a) 缺少方言配置 b) 缺少端口号连接到服务器
以下已更正DataSource.groovy
dataSource {
pooled = true
jmxExport = true
//driverClassName = "org.h2.Driver"
driverClassName = "com.mysql.jdbc.Driver"
dialect = "org.hibernate.dialect.MySQL5InnoDBDialect"
username = "sa"
password = ""
}
hibernate {
cache.use_second_level_cache = true
cache.use_query_cache = false
// cache.region.factory_class = 'net.sf.ehcache.hibernate.EhCacheRegionFactory' // Hibernate 3
cache.region.factory_class = 'org.hibernate.cache.ehcache.EhCacheRegionFactory' // Hibernate 4
singleSession = true // configure OSIV singleSession mode
flush.mode = 'manual' // OSIV session flush mode outside of transactional context
}
// environment specific settings
environments {
development {
dataSource {
dbCreate = "update" // one of 'create', 'create-drop', 'update', 'validate', ''
//url = "jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost:3306/test"//you had a missing port here
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
test {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
}
}
production {
dataSource {
dbCreate = "update"
//url = "jdbc:h2:prodDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE"
url = "jdbc:mysql://localhost/test"
driverClassName = "com.mysql.jdbc.Driver"
username = "root"
password = ""
properties {
// See http://grails.org/doc/latest/guide/conf.html#dataSource for documentation
jmxEnabled = true
initialSize = 5
maxActive = 50
minIdle = 5
maxIdle = 25
maxWait = 10000
maxAge = 10 * 60000
timeBetweenEvictionRunsMillis = 5000
minEvictableIdleTimeMillis = 60000
validationQuery = "SELECT 1"
validationQueryTimeout = 3
validationInterval = 15000
testOnBorrow = true
testWhileIdle = true
testOnReturn = false
jdbcInterceptors = "ConnectionState"
defaultTransactionIsolation = java.sql.Connection.TRANSACTION_READ_COMMITTED
}
}
}
}
希望对您有所帮助！！如果您在新 DataSource.groovy.
之后遇到任何问题，请告诉我