mvn jetty:run failing Caused by: java.lang.RuntimeException: 错误扫描条目 META-INF/versions/9/javax/xml/bind/ModuleUtil.class
mvn jetty:run failing Caused by: java.lang.RuntimeException: Error scanning entry META-INF/versions/9/javax/xml/bind/ModuleUtil.class
我正在尝试对我的项目执行 mvn jetty:run，但是该过程一直失败，我无法在本地获取项目 运行ning。从错误堆栈跟踪中，我认为需要关注的一个相关问题是 Caused by: java.lang.RuntimeException: Error scanning entry META-INF/versions/9/javax/xml/bind/ModuleUtil.class from jar file:///C:/Users/Tabish/.m2/repository/javax/xml/bind/jaxb-api/2.3.0/jaxb-api-2.3.0.jar。我尝试更改 jaxb 的版本但无济于事。
这是错误轨迹
[WARNING] Failed startup of context o.e.j.m.p.JettyWebAppContext@4998e74b{/myntra-v4-proxy,[file:///C:/Users/Tabish/Documents/Increff/Code/proxies/myntra-v4-proxy/target/webapp-tmp/, jar:file:///C:/Users/Tabish/.m2/repository/io/springfox/springfox-swagger-ui/2.4.0/springfox-swagger-ui-2.4.0.jar!/META-INF/resources],STARTING}{file:///C:/Users/Tabish/Documents/Increff/Code/proxies/myntra-v4-proxy/target/webapp-tmp/}
org.eclipse.jetty.util.MultiException: Multiple exceptions
at org.eclipse.jetty.annotations.AnnotationConfiguration.scanForAnnotations (AnnotationConfiguration.java:536)
at org.eclipse.jetty.annotations.AnnotationConfiguration.configure (AnnotationConfiguration.java:447)
at org.eclipse.jetty.webapp.WebAppContext.configure (WebAppContext.java:491)
at org.eclipse.jetty.webapp.WebAppContext.startContext (WebAppContext.java:1336)
at org.eclipse.jetty.server.handler.ContextHandler.doStart (ContextHandler.java:772)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart (ServletContextHandler.java:263)
at org.eclipse.jetty.webapp.WebAppContext.doStart (WebAppContext.java:517)
at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart (JettyWebAppContext.java:398)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart (ContextHandlerCollection.java:161)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
at org.eclipse.jetty.server.Server.start (Server.java:405)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:106)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
at org.eclipse.jetty.server.Server.doStart (Server.java:372)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.startJetty (AbstractJettyMojo.java:460)
at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.execute (AbstractJettyMojo.java:328)
at org.eclipse.jetty.maven.plugin.JettyRunMojo.execute (JettyRunMojo.java:170)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:566)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
at org.codehaus.classworlds.Launcher.main (Launcher.java:47)
Caused by: org.eclipse.jetty.util.MultiException: Multiple exceptions
at org.eclipse.jetty.annotations.AnnotationParser.parseJar (AnnotationParser.java:923)
at org.eclipse.jetty.annotations.AnnotationParser.parse (AnnotationParser.java:851)
at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call (AnnotationConfiguration.java:163)
at org.eclipse.jetty.annotations.AnnotationConfiguration.run (AnnotationConfiguration.java:548)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run (QueuedThreadPool.java:572)
at java.lang.Thread.run (Thread.java:834)
Caused by: java.lang.RuntimeException: Error scanning entry META-INF/versions/9/javax/xml/bind/ModuleUtil.class from jar file:///C:/Users/Tabish/.m2/repository/javax/xml/bind/jaxb-api/2.3.0/jaxb-api-2.3.0.jar
at org.eclipse.jetty.annotations.AnnotationParser.parseJar (AnnotationParser.java:937)
at org.eclipse.jetty.annotations.AnnotationParser.parse (AnnotationParser.java:851)
at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call (AnnotationConfiguration.java:163)
at org.eclipse.jetty.annotations.AnnotationConfiguration.run (AnnotationConfiguration.java:548)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run (QueuedThreadPool.java:572)
at java.lang.Thread.run (Thread.java:834)
Caused by: java.lang.IllegalArgumentException
at org.objectweb.asm.ClassReader.<init> (Unknown Source)
at org.objectweb.asm.ClassReader.<init> (Unknown Source)
at org.objectweb.asm.ClassReader.<init> (Unknown Source)
at org.eclipse.jetty.annotations.AnnotationParser.scanClass (AnnotationParser.java:1003)
at org.eclipse.jetty.annotations.AnnotationParser.parseJarEntry (AnnotationParser.java:984)
at org.eclipse.jetty.annotations.AnnotationParser.parseJar (AnnotationParser.java:933)
at org.eclipse.jetty.annotations.AnnotationParser.parse (AnnotationParser.java:851)
at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call (AnnotationConfiguration.java:163)
at org.eclipse.jetty.annotations.AnnotationConfiguration.run (AnnotationConfiguration.java:548)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run (QueuedThreadPool.java:572)
at java.lang.Thread.run (Thread.java:834)
[INFO] Started ServerConnector@721bf7ad{HTTP/1.1,[http/1.1]}{0.0.0.0:9000}
[INFO] Started @31575ms
[INFO] Started Jetty Server
我是运行jdk-11.0.2。我的 pom.xml 具有以下依赖项和码头插件（我认为其中之一导致了问题）
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.el</artifactId>
<version>3.0.0</version>
</dependency>
<!-- Lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mockito/mockito-all -->
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>${mockito.version}</version>
</dependency>
...
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.7.v20160115</version>
</plugin>
...
如何解决这个问题，让我的项目 运行 在本地机器上运行？
- 参考pom of jaxb-api/2.3.0，目标jdk版本为9.
- 通过查找jetty-annotations/9.3.7.v20160115的依赖，对
“org.ow2.asm/asm”是 5.0.1
由于JDK 9是2017年9月发布的，asm库肯定不会支持java 9，
ClassReader 也可以参考源码
public class ClassReader {
...
/**
* Constructs a new {@link ClassReader} object.
*
* @param b
* the bytecode of the class to be read.
* @param off
* the start offset of the class data.
* @param len
* the length of the class data.
*/
public ClassReader(final byte[] b, final int off, final int len) {
this.b = b;
// checks the class version
if (readShort(off + 6) > Opcodes.V1_8) {
throw new IllegalArgumentException();
}
...
}
我们看到如果版本高于 1.8，则会检查 class 版本。
以下程序显示如何检查 jar 是否包含 class 不支持 ClassReader。
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;
import org.objectweb.asm.ClassReader;
public class ClassReaderJarVersionCheck {
public static void main(String[] args) throws FileNotFoundException, IOException {
checkClassVersion();
}
private static void checkClassVersion() {
String jarPath = "{path_to_jar}\jaxb-api-2.3.0.jar";
try (JarFile jarFile = new JarFile(jarPath)) {
jarFile.stream().forEach(jarEntry -> {
if (jarEntry.isDirectory() || !jarEntry.getName().endsWith(".class")) {
return;
}
int version = -1;
try {
byte[] byteArray = toByteArray(jarFile.getInputStream(jarEntry));
version = readShort(byteArray, 6);
new ClassReader(byteArray);
} catch (IOException e) {
throw new RuntimeException(e);
} catch (IllegalArgumentException e) {
System.out.println(jarEntry.getName() + " version: " + version);
}
});
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
private static short readShort(byte[] b, int index) {
return (short) (((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF));
}
private static byte[] toByteArray(InputStream is) throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
byte[] data = new byte[1024];
while ((nRead = is.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
byte[] byteArray = buffer.toByteArray();
return byteArray;
}
}
解决方案
为 JDK>=11
升级 Jetty
参考jetty 9.4.12 release announcement, update the dependency of jetty to version 9.4.12支持JDK11应该可以解决问题
降级 jaxb-api 为 JDK 8
使用版本 2.2.11 作为 next version 2.3.0 start adopting JDK 9
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2.11</version>
</dependency>
我正在尝试对我的项目执行 mvn jetty:run，但是该过程一直失败，我无法在本地获取项目 运行ning。从错误堆栈跟踪中，我认为需要关注的一个相关问题是 Caused by: java.lang.RuntimeException: Error scanning entry META-INF/versions/9/javax/xml/bind/ModuleUtil.class from jar file:///C:/Users/Tabish/.m2/repository/javax/xml/bind/jaxb-api/2.3.0/jaxb-api-2.3.0.jar。我尝试更改 jaxb 的版本但无济于事。
这是错误轨迹
[WARNING] Failed startup of context o.e.j.m.p.JettyWebAppContext@4998e74b{/myntra-v4-proxy,[file:///C:/Users/Tabish/Documents/Increff/Code/proxies/myntra-v4-proxy/target/webapp-tmp/, jar:file:///C:/Users/Tabish/.m2/repository/io/springfox/springfox-swagger-ui/2.4.0/springfox-swagger-ui-2.4.0.jar!/META-INF/resources],STARTING}{file:///C:/Users/Tabish/Documents/Increff/Code/proxies/myntra-v4-proxy/target/webapp-tmp/}
org.eclipse.jetty.util.MultiException: Multiple exceptions
at org.eclipse.jetty.annotations.AnnotationConfiguration.scanForAnnotations (AnnotationConfiguration.java:536)
at org.eclipse.jetty.annotations.AnnotationConfiguration.configure (AnnotationConfiguration.java:447)
at org.eclipse.jetty.webapp.WebAppContext.configure (WebAppContext.java:491)
at org.eclipse.jetty.webapp.WebAppContext.startContext (WebAppContext.java:1336)
at org.eclipse.jetty.server.handler.ContextHandler.doStart (ContextHandler.java:772)
at org.eclipse.jetty.servlet.ServletContextHandler.doStart (ServletContextHandler.java:263)
at org.eclipse.jetty.webapp.WebAppContext.doStart (WebAppContext.java:517)
at org.eclipse.jetty.maven.plugin.JettyWebAppContext.doStart (JettyWebAppContext.java:398)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.doStart (ContextHandlerCollection.java:161)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:114)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start (ContainerLifeCycle.java:132)
at org.eclipse.jetty.server.Server.start (Server.java:405)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart (ContainerLifeCycle.java:106)
at org.eclipse.jetty.server.handler.AbstractHandler.doStart (AbstractHandler.java:61)
at org.eclipse.jetty.server.Server.doStart (Server.java:372)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start (AbstractLifeCycle.java:68)
at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.startJetty (AbstractJettyMojo.java:460)
at org.eclipse.jetty.maven.plugin.AbstractJettyMojo.execute (AbstractJettyMojo.java:328)
at org.eclipse.jetty.maven.plugin.JettyRunMojo.execute (JettyRunMojo.java:170)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:956)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:566)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:347)
at org.codehaus.classworlds.Launcher.main (Launcher.java:47)
Caused by: org.eclipse.jetty.util.MultiException: Multiple exceptions
at org.eclipse.jetty.annotations.AnnotationParser.parseJar (AnnotationParser.java:923)
at org.eclipse.jetty.annotations.AnnotationParser.parse (AnnotationParser.java:851)
at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call (AnnotationConfiguration.java:163)
at org.eclipse.jetty.annotations.AnnotationConfiguration.run (AnnotationConfiguration.java:548)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run (QueuedThreadPool.java:572)
at java.lang.Thread.run (Thread.java:834)
Caused by: java.lang.RuntimeException: Error scanning entry META-INF/versions/9/javax/xml/bind/ModuleUtil.class from jar file:///C:/Users/Tabish/.m2/repository/javax/xml/bind/jaxb-api/2.3.0/jaxb-api-2.3.0.jar
at org.eclipse.jetty.annotations.AnnotationParser.parseJar (AnnotationParser.java:937)
at org.eclipse.jetty.annotations.AnnotationParser.parse (AnnotationParser.java:851)
at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call (AnnotationConfiguration.java:163)
at org.eclipse.jetty.annotations.AnnotationConfiguration.run (AnnotationConfiguration.java:548)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run (QueuedThreadPool.java:572)
at java.lang.Thread.run (Thread.java:834)
Caused by: java.lang.IllegalArgumentException
at org.objectweb.asm.ClassReader.<init> (Unknown Source)
at org.objectweb.asm.ClassReader.<init> (Unknown Source)
at org.objectweb.asm.ClassReader.<init> (Unknown Source)
at org.eclipse.jetty.annotations.AnnotationParser.scanClass (AnnotationParser.java:1003)
at org.eclipse.jetty.annotations.AnnotationParser.parseJarEntry (AnnotationParser.java:984)
at org.eclipse.jetty.annotations.AnnotationParser.parseJar (AnnotationParser.java:933)
at org.eclipse.jetty.annotations.AnnotationParser.parse (AnnotationParser.java:851)
at org.eclipse.jetty.annotations.AnnotationConfiguration$ParserTask.call (AnnotationConfiguration.java:163)
at org.eclipse.jetty.annotations.AnnotationConfiguration.run (AnnotationConfiguration.java:548)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob (QueuedThreadPool.java:654)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run (QueuedThreadPool.java:572)
at java.lang.Thread.run (Thread.java:834)
[INFO] Started ServerConnector@721bf7ad{HTTP/1.1,[http/1.1]}{0.0.0.0:9000}
[INFO] Started @31575ms
[INFO] Started Jetty Server
我是运行jdk-11.0.2。我的 pom.xml 具有以下依赖项和码头插件（我认为其中之一导致了问题）
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<dependency>
<groupId>org.glassfish</groupId>
<artifactId>javax.el</artifactId>
<version>3.0.0</version>
</dependency>
<!-- Lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.8</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mockito/mockito-all -->
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-all</artifactId>
<version>${mockito.version}</version>
</dependency>
...
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.7.v20160115</version>
</plugin>
...
如何解决这个问题，让我的项目 运行 在本地机器上运行？
- 参考pom of jaxb-api/2.3.0，目标jdk版本为9.
- 通过查找jetty-annotations/9.3.7.v20160115的依赖，对
“org.ow2.asm/asm”是 5.0.1
由于JDK 9是2017年9月发布的，asm库肯定不会支持java 9，
ClassReader也可以参考源码
public class ClassReader {
...
/**
* Constructs a new {@link ClassReader} object.
*
* @param b
* the bytecode of the class to be read.
* @param off
* the start offset of the class data.
* @param len
* the length of the class data.
*/
public ClassReader(final byte[] b, final int off, final int len) {
this.b = b;
// checks the class version
if (readShort(off + 6) > Opcodes.V1_8) {
throw new IllegalArgumentException();
}
...
}
我们看到如果版本高于 1.8，则会检查 class 版本。
以下程序显示如何检查 jar 是否包含 class 不支持 ClassReader。
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarFile;
import org.objectweb.asm.ClassReader;
public class ClassReaderJarVersionCheck {
public static void main(String[] args) throws FileNotFoundException, IOException {
checkClassVersion();
}
private static void checkClassVersion() {
String jarPath = "{path_to_jar}\jaxb-api-2.3.0.jar";
try (JarFile jarFile = new JarFile(jarPath)) {
jarFile.stream().forEach(jarEntry -> {
if (jarEntry.isDirectory() || !jarEntry.getName().endsWith(".class")) {
return;
}
int version = -1;
try {
byte[] byteArray = toByteArray(jarFile.getInputStream(jarEntry));
version = readShort(byteArray, 6);
new ClassReader(byteArray);
} catch (IOException e) {
throw new RuntimeException(e);
} catch (IllegalArgumentException e) {
System.out.println(jarEntry.getName() + " version: " + version);
}
});
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
private static short readShort(byte[] b, int index) {
return (short) (((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF));
}
private static byte[] toByteArray(InputStream is) throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
int nRead;
byte[] data = new byte[1024];
while ((nRead = is.read(data, 0, data.length)) != -1) {
buffer.write(data, 0, nRead);
}
buffer.flush();
byte[] byteArray = buffer.toByteArray();
return byteArray;
}
}
解决方案
为 JDK>=11
升级 Jetty参考jetty 9.4.12 release announcement, update the dependency of jetty to version 9.4.12支持JDK11应该可以解决问题
降级 jaxb-api 为 JDK 8
使用版本 2.2.11 作为 next version 2.3.0 start adopting JDK 9
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2.11</version>
</dependency>