grails3.3 升级grails4 问题解决
升级教程
需要注意，如果引入插件，需要确认查看插件版本，有需要升级的要升级版本，否则各种问题
需要注意：
需要手动在build.gradle中添加相关依赖包
如果出现执行报错：
则手动将gradle包从3.5升级到gradle5就可以了，即：
更改为
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-bin.zip
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists再运行 ：
./gradlew wrapper --gradle-version 5.0如果出现以下报错，则：
需要修改build.gradle
buildscript {
repositories {
mavenLocal()
maven { url "https://repo.grails.org/grails/core" }
}
dependencies {
classpath "org.grails:grails-gradle-plugin:$grailsVersion"
classpath "org.grails.plugins:hibernate5:7.0.0"
classpath "org.grails.plugins:views-gradle:1.2.9"
classpath "gradle.plugin.com.energizedwork.webdriver-binaries:webdriver-binaries-gradle-plugin:$webdriverBinariesVersion"
}
}
需要把初始化数据放到service里面，然后引用，其实也就是需要有事务
如果是service报错，需要在service上添加事务注解
@Transactional
注意：
升级Grails4.0.1后，可能启动时卡主，卡在：compileGroovy,如图：
或者
接着你们会发现风扇呼呼呼，，，，最后，内存溢出
运行：grails compile --verbose
19:22:43.308 [DEBUG] [org.gradle.internal.operations.DefaultBuildOperationExecutor] Build operation 'compiler daemon' started
19:22:44.264 [DEBUG] [org.gradle.internal.nativeintegration.services.NativeServices] Native-platform posix files integration is not available. Continuing with fallback.
19:22:45.397 [LIFECYCLE] [org.gradle.process.internal.health.memory.MemoryManager]
19:22:45.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 6195093504}
19:22:45.397 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 6195093504}
19:22:45.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:22:48.341 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 312475648}
19:22:50.396 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 6082039808}
19:22:50.396 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 6082039808}
19:22:50.396 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:22:52.007 [DEBUG] [org.gradle.launcher.daemon.server.Daemon] DaemonExpirationPeriodicCheck running
19:22:52.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:22:52.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
19:22:52.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
19:22:52.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:22:52.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
19:22:52.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
19:22:53.342 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 363855872}
19:22:55.396 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 6093733888}
19:22:55.396 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 6093733888}
19:22:55.396 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:22:45.319 [LIFECYCLE] [class org.gradle.internal.buildevents.TaskExecutionLogger]
19:22:45.319 [LIFECYCLE] [class org.gradle.internal.buildevents.TaskExecutionLogger] > Task :compileGroovy
19:22:57.686 [INFO] [org.gradle.api.internal.tasks.compile.JdkJavaCompiler] Compiling with JDK Java compiler API.
19:22:58.339 [LIFECYCLE] [org.gradle.process.internal.health.memory.MemoryManager]
19:22:58.339 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 357564416}
19:23:00.396 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 5980852224}
19:23:00.396 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 5980852224}
19:23:00.396 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:23:02.007 [DEBUG] [org.gradle.launcher.daemon.server.Daemon] DaemonExpirationPeriodicCheck running
19:23:02.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:23:02.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
19:23:02.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
19:23:02.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:23:02.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
19:23:02.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
19:23:03.342 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 350748672}
19:23:05.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 5909340160}
19:23:05.397 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 5909340160}
19:23:05.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:23:08.342 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 464519168}
19:23:10.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 5804036096}
19:23:10.397 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 5804036096}
19:23:10.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:23:12.007 [DEBUG] [org.gradle.launcher.daemon.server.Daemon] DaemonExpirationPeriodicCheck running
19:23:12.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:23:12.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
19:23:12.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
19:23:12.009 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:23:12.010 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
19:23:12.010 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.
19:23:13.398 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 439353344}
19:23:15.398 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 5803118592}
19:23:15.398 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 5803118592}
19:23:15.398 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:23:18.342 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 439353344}
19:23:20.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting OS memory status event {Total: 17017151488, Free: 5803638784}
19:23:20.397 [DEBUG] [org.gradle.launcher.daemon.server.health.LowMemoryDaemonExpirationStrategy] Received memory status update: {Total: 17017151488, Free: 5803638784}
19:23:20.397 [DEBUG] [org.gradle.process.internal.health.memory.MemoryManager] Emitting JVM memory status event {Maximum: 477626368, Committed: 330825728}
19:23:22.006 [DEBUG] [org.gradle.launcher.daemon.server.Daemon] DaemonExpirationPeriodicCheck running
19:23:22.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
19:23:22.008 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
一直在重复，直到内存溢出，
解决办法：官方回复
- Set the following properties in gradle.properties
.gradle.properties
org.gradle.daemon=true
org.gradle.parallel=true
org.gradle.jvmargs=-Xmx1024M
- In build.gradle file set the
forkOptionsfor compileGroovy task as:
.build.gradle
compileGroovy.groovyOptions.forkOptions.jvmArgs = ['-Xmx1024m']idea启动报错，
但是，直接Application.groovy里面启动是可以的
个人感觉解决方式有点勉强，但是应该有更好的解决办法，没办法，技不如人，自己又找不到问题所在，只能先用着了，，，哎（技不如人，技不如人，技不如人）