我正在 Tomcat 7 上开发 webapp。在本地版本的 Tomcat 上一切正常，但是当我将它部署到生产服务器上时，它会引发此异常。

java.lang.VerifyError: (class: org/apache/commons/logging/impl/Log4JLogger, method: fatal signature: (Ljava/lang/Object;Ljava/lang/Throwable;)V) Incompatible object argument for function call
    at java.lang.Class.getDeclaredConstructors0(Native Method)
    at java.lang.Class.privateGetDeclaredConstructors(Class.java:2595)
    at java.lang.Class.getConstructor0(Class.java:2895)
    at java.lang.Class.getConstructor(Class.java:1731)
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
    at org.apache.fop.apps.FopFactory.<clinit>(FopFactory.java:68)
    at cz.soma.tomcat.generator.DokumentaceUtils.createPdfDocument(DokumentaceUtils.java:818)
    at cz.soma.tomcat.generator.FileFactory.createPdfDocument(FileFactory.java:58)
    at cz.soma.tomcat.generator.Generator.doPost(Generator.java:111)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)

当我尝试 FopFactory.newInstance(); 时抛出错误(来自 Apache FOP 1.0)。之后，它会尝试LogFactory.getLog(FopFactory.class);。它导致调用 logClass.getConstructor(logConstructorSignature);，其中 logConstructorSignature 包含一个 String.class。 (至少在我的本地机器上)

try {
    logConstructor = logClass.getConstructor(logConstructorSignature);
    return (logConstructor);
} catch (Throwable t) {
    throw new LogConfigurationException
        ("No suitable Log constructor " +
         logConstructorSignature+ " for " + logClassName, t);
}

之后调用 java.lang.Class 函数并抛出异常。 你有什么想法，为什么错误只在生产服务器上抛出，而不是在我的本地机器上？

最佳答案

为什么会出现这个错误(java.lang.VerifyError)？

java.lang.VerifyError 将是您针对与在运行时(在您的生产服务器中)使用的库不同的库进行编译时的结果。

建议#1:

您可以使用 commons-logging-1.1.1.jar 代替 commons-logging-1.0.4.jar。然后重建您的项目并检查。

资源链接: http://www.java-samples.com/showtutorial.php?tutorialid=674

建议#2:

如果你使用的是maven，那么在你的pom.xml中添加这个依赖，

<dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.1.1</version>
</dependency>

并从您的 pom.xml 中删除以下依赖项

<dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>1.0.4</version>
</dependency>

资源链接: Getting java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory exception

建议#3:

templatetypedef已经挖掘了问题并给出了2个解决方案

A VerifyError usually means that you loaded in a class file that is somehow malformed or which references another class file that has changed in a way that causes the code in another class file to no longer be valid. For example, if you compiled a class file that referenced a method in some other class, then independently modified and recompiled the second class after altering that method's signature, you'd get this sort of error.

I'd suggest doing a clean build and seeing if this issue goes away. If not, check whether you're using up-to-date JARs and source files.

资源链接: https://stackoverflow.com/a/5411528/2293534

建议#4:

如果本地服务器和生产服务器之间的 JDK 版本不匹配，请尽可能使其相同。您也可以尝试在不同的机器上使用不同的 JDK 版本进行编译。

资源链接: Causes of getting a java.lang.VerifyError

希望对你有所帮助。

关于java - Tomcat 7 生产服务器上的 VerifyError 可能由 Apache Commons Logging 1.0.4 引起，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42575362/