使用gradle迁移到Java 11; UnsupportedOperationException异常

Question

尝试从jdk 10切换到11并且无法确定哪个库调用此异常:

Caused by: org.gradle.api.GradleException: failed to read class file ../../SomeTestFile.class
...
...
Caused by: java.lang.UnsupportedOperationException
        at org.objectweb.asm.ClassVisitor.visitNestMemberExperimental(ClassVisitor.java:248)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:651)
        at org.objectweb.asm.ClassReader.accept(ClassReader.java:391)
        at org.gradle.api.internal.tasks.testing.detection.AbstractTestFrameworkDetector.classVisitor(AbstractTestFrameworkDetector.java:124)

我正在使用gradle包装器(v4.10.2),其中包括build.gradle:

buildscript {
    ext {
        springBootVersion = '2.0.5.RELEASE'
        schemaDownloadVersion = '1.6'
        generateAvroVersion = '0.14.2'
    }
    repositories {
        mavenCentral()
        maven { url "https://plugins.gradle.org/m2/" }
        maven { url "http://packages.confluent.io/maven/" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
        classpath("gradle.plugin.com.amit.plugin.download-registry:registry-schema-download-plugin:${schemaDownloadVersion}")
        classpath("com.commercehub.gradle.plugin:gradle-avro-plugin:${generateAvroVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'jacoco'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'com.amit.plugin.download-registry'
apply plugin: 'com.commercehub.gradle.plugin.avro'

group = 'com.example'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 11

repositories {
    mavenCentral()
}

ext {
    springCloudVersion = 'Finchley.RELEASE'
    jaxbVersion = '2.3.0'
    activationVersion = '1.1.1'
    jmockitVersion = '1.43'
    lombokVersion = '1.18.2'
}

jacoco {
    toolVersion = '0.8.2'
}

dependencies {
    compile('org.springframework.cloud:spring-cloud-starter-oauth2')
    compile("javax.xml.bind:jaxb-api:${jaxbVersion}")
    compile("com.sun.xml.bind:jaxb-core:${jaxbVersion}")
    compile("com.sun.xml.bind:jaxb-impl:${jaxbVersion}")
    compile("javax.activation:activation:${activationVersion}")
    compileOnly("org.projectlombok:lombok:${lombokVersion}")
    testCompile("org.jmockit:jmockit:${jmockitVersion}")
    testCompile('org.springframework.boot:spring-boot-starter-test') {
        exclude(group: 'org.mockito')
    }
}

dependencyManagement {
    imports {
        mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
    }
}

...

调查这个问题我只弄清楚gradle本身,lombok和jmockit使用的asm库可能会导致这个异常.有人可以回答我什么库调用此异常？

UPDATE

我发现有关同一问题的文章:https: //matsumana.info/blog/2018/09/25/gradle-with-jdk11/,这里指向gradle问题https://github.com/gradle/gradle/issues/5120 所以这意味着gradle还不支持Java 11吗？

Answer 1

Java 11添加了基于嵌套的访问,因此必须更新任何像ASM这样编写API的字节代码以支持类文件更改.

查看6.2.1版ASM中该方法的源代码(gradle似乎正在使用该代码):

  @Deprecated
  public void visitNestMemberExperimental(final String nestMember) {
    if (api < Opcodes.ASM7_EXPERIMENTAL) {
      throw new UnsupportedOperationException();
    }
    if (cv != null) {
      cv.visitNestMemberExperimental(nestMember);
    }
  }

所需的API级别为7,目前处于测试阶段.我猜他们在更新依赖项之前正在等待ASM 7的发布版本.

Answer 2

ASM v7已发布。

Gradle 问题已关闭，可以在Gradle 5.0 RC1或更高版本中获得修复。

二进制文件应该很快就可以下载了。

Answer 3

Gradle 4.10.3 版似乎也解决了。