Jersey 2 + solr 4.6.1 maven ClassNotFoundException com.sun.jersey.spi.inject.InjectableProvider

Question

我在 Tomcat8 上部署了一个 REST 应用程序，没有任何问题。当我尝试在 Jetty9 服务器中执行相同操作时，它会引发异常：

Caused by:
java.lang.ClassNotFoundException: com.sun.jersey.spi.inject.InjectableProvider
        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
        at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:487)
        at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:428)
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
        at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
        at org.eclipse.jetty.webapp.WebAppClassLoader.findClass(WebAppClassLoader.java:550)
        at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:475)
        at org.eclipse.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:428)
        at org.eclipse.jetty.util.Loader.loadClass(Loader.java:86)
        at org.eclipse.jetty.plus.annotation.ContainerInitializer.callStartup(ContainerInitializer.java:130)
        at org.eclipse.jetty.annotations.ServletContainerInitializersStarter.doStart(ServletContainerInitializersStarter.java:63)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
        at org.eclipse.jetty.servlet.ServletContextHandler.startContext(ServletContextHandler.java:330)
        at org.eclipse.jetty.webapp.WebAppContext.startWebapp(WebAppContext.java:1404)
        at org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1366)
        at org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:778)
        at org.eclipse.jetty.servlet.ServletContextHandler.doStart(ServletContextHandler.java:262)
        at org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:520)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
        at org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:41)
        at org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:188)
        at org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:499)
        at org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:147)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180)
        at org.eclipse.jetty.deploy.providers.WebAppProvider.fileAdded(WebAppProvider.java:452)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64)
        at org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:610)
        at org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:529)
        at org.eclipse.jetty.util.Scanner.scan(Scanner.java:392)
        at org.eclipse.jetty.util.Scanner.doStart(Scanner.java:313)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
        at org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:150)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
        at org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:561)
        at org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:236)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:131)
        at org.eclipse.jetty.server.Server.start(Server.java:411)
        at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:113)
        at org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61)
        at org.eclipse.jetty.server.Server.doStart(Server.java:378)
        at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
        at org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1516)
        at java.security.AccessController.doPrivileged(Native Method)
        at org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1441)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.eclipse.jetty.start.Main.invokeMain(Main.java:214)
        at org.eclipse.jetty.start.Main.start(Main.java:457)
        at org.eclipse.jetty.start.Main.main(Main.java:75)

我没有使用 Jersey1 依赖项 (com.sun.jersey)，所以这很奇怪。出于这个原因，我尝试通过仅使用 pom.xml 创建一个空项目来隔离问题，如下所示：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>bigBoWS_test</artifactId>
    <packaging>war</packaging>
    <version>1.0</version>
    <name>BigBoWS Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.14</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.22.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-core</artifactId>
            <version>4.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-solrj</artifactId>
            <version>4.6.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

我尝试一一删除依赖，直到我发现问题是 solr-core 依赖。如果我删除该依赖项，Jetty 服务器不会给出任何错误。这是没有那种依赖的 pom。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>bigBoWS_test</artifactId>
    <packaging>war</packaging>
    <version>1.0</version>
    <name>BigBoWS Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.14</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.22.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.solr</groupId>
            <artifactId>solr-solrj</artifactId>
            <version>4.6.1</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>${project.artifactId}</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

我不明白为什么使用这个库，“某人”会要求 com.sum.jersey...当我使用 Jersey 2 时，它使用 org.glassfish.jersey...

提前致谢。

Answer 1

我的项目在从 tomcat8 迁移到 jetty9 时遇到了同样的问题。我们能够通过将 solr-core 的范围从“编译”更改为“测试”来解决问题。当然，幸运的是，这对我们的特定项目来说是可能的，而对您的项目来说可能是不可能的。

    <dependency>
        <groupId>org.apache.solr</groupId>
        <artifactId>solr-core</artifactId>
        <version>6.3.0</version>
        <scope>test</scope>
    </dependency>

注意：非常感谢您的提问。我永远不会发现根本原因是对 solr-core 的依赖。事实上，为什么使用这个库会导致“某人”要求 com.sum.jersey 是一个谜。