实体由两个类加载器加载时，调用序列化方法提示NoClassDefFoundError

[ccc910283013]

实体对象

public class QueryStatisticRequest implements AbstractRequest {
//这个枚举是来源于另一个jar文件
private SubTypeEnum subType;
}

打包后调用
JSON.toJSONString(new QueryStatisticRequest())
提示NoClassDefFoundError:Lxxxxxx

后调试发现SubTypeEnum 来源于launchclassloader
而QueryStatisticRequest 来源于appclassloader

最后通过修改打包方式解决了这个问题, 好奇这是fastjson的bug吗？

原打包方式：

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>

            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                            <version>${lombok.version}</version>
                        </path>
                        <!-- This is needed when using Lombok 1.18.16 and above -->
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok-mapstruct-binding</artifactId>
                            <version>0.2.0</version>
                        </path>
                        <!-- Mapstruct should follow the lombok path(s) -->
                        <path>
                            <groupId>org.mapstruct</groupId>
                            <artifactId>mapstruct-processor</artifactId>
                            <version>${org.mapstruct.version}</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>

            <!-- 打包jar文件时，配置manifest文件，加入lib包的jar依赖 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.0.2</version>
                <configuration>
                    <archive>
                        <!-- 生成的jar中，不要包含pom.xml和pom.properties这两个文件 -->
                        <addMavenDescriptor>false</addMavenDescriptor>
                        <!-- 给清单文件添加键值对(配置文件外置) -->
                        <manifestEntries>
                            <Class-Path>configs/</Class-Path>
                        </manifestEntries>
                        <!-- 清单文件 -->
                        <manifest>
                            <!--应用的main class-->
                            <mainClass>cn.jinka.gcdp.metacenter.MetaCenterApplication</mainClass>
                            <!--是否要把第三方jar添加到classpath中-->
                            <addClasspath>true</addClasspath>
                            <!--生成的manifest中classpath的前缀，因为要把第三方jar放到lib目录下，所以classpath的前缀是lib/-->
                            <classpathPrefix>lib/</classpathPrefix>
                        </manifest>
                    </archive>
                    <!--过滤掉不希望包含在jar中的文件-->
                    <excludes>
                        <exclude>mapper/**</exclude>
                        <exclude>*.yml</exclude>
                        <exclude>*.xml</exclude>
                        <exclude>*.txt</exclude>
                    </excludes>
                </configuration>
            </plugin>
            <!-- 拷贝依赖的jar包到lib目录 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>3.0.2</version>
                <executions>
                    <execution>
                        <id>copy</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-dependencies</goal>
                        </goals>
                        <configuration>
                            <overWriteReleases>false</overWriteReleases>
                            <overWriteSnapshots>false</overWriteSnapshots>
                            <overWriteIfNewer>true</overWriteIfNewer>
                            <outputDirectory>${project.build.directory}/lib/</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
            <!-- 解决资源文件的编码问题 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>3.0.2</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                </configuration>
                <executions>
                    <execution>
                        <id>copy-resources</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${project.build.directory}/configs</outputDirectory>
                            <resources>
                                <resource>
                                    <directory>${basedir}/src/main/resources</directory>
                                    <filtering>true</filtering>
                                </resource>
                            </resources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>

            <!-- 自定义打zip包 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>3.1.0</version>
                <configuration>
                    <descriptors>
                        <descriptor>src/main/assembly/assembly.xml</descriptor>
                    </descriptors>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>install</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

新的打包方式

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                    <annotationProcessorPaths>
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                            <version>${lombok.version}</version>
                        </path>
                        <!-- This is needed when using Lombok 1.18.16 and above -->
                        <path>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok-mapstruct-binding</artifactId>
                            <version>0.2.0</version>
                        </path>
                        <!-- Mapstruct should follow the lombok path(s) -->
                        <path>
                            <groupId>org.mapstruct</groupId>
                            <artifactId>mapstruct-processor</artifactId>
                            <version>1.5.2.Final</version>
                        </path>
                    </annotationProcessorPaths>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <includeSystemScope>true</includeSystemScope>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

[ccc910283013]

使用版本是1.2.70