如何将 logback-access 与 Tomcat 5.5 结合使用？

发布于 2024-07-20 14:26:23 字数 931 浏览 7 评论 0原文

我在 Tomcat 5.5 服务器上运行了多个 Web 应用程序，并且我正在努力改进/更新整个系统中使用的整体日志记录系统。我已经在 logback-classic 方面取得了一些成功。但是，当我尝试使用 logback-access （即访问 lbAccessStatus servlet）时，我收到此异常：

exception

javax.servlet.ServletException:
  Wrapper cannot find servlet class
    ch.qos.logback.access.ViewStatusMessagesServlet
  or a class it depends on

org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
...

root cause

java.lang.ClassNotFoundException:
  ch.qos.logback.access.ViewStatusMessagesServlet

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386)
...

我已根据 docs：

  common/lib:
    logback-classic-0.9.15.jar
    logback-core-0.9.15.jar
  server/lib:
    logback-access-0.9.15.jar

在库中移动似乎没有帮助。 logback-classic 似乎工作正常，只是 logback-access 导致了问题。

原文

I've got several Web apps running on a Tomcat 5.5 server, and I'm working on improving/updating the overall logging system used throughout the system. I already had some success with logback-classic. However, when I try to use logback-access (i.e. access the lbAccessStatus servlet), I get this exception:

exception

javax.servlet.ServletException:
  Wrapper cannot find servlet class
    ch.qos.logback.access.ViewStatusMessagesServlet
  or a class it depends on

org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
...

root cause

java.lang.ClassNotFoundException:
  ch.qos.logback.access.ViewStatusMessagesServlet

org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1386)
...

I have everything set up according to the docs:

  common/lib:
    logback-classic-0.9.15.jar
    logback-core-0.9.15.jar
  server/lib:
    logback-access-0.9.15.jar

Moving around the libraries doesn't seem to help. logback-classic seems to work fine, it's just logback-access that causes problems.

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陌生 2024-07-27 14:26:23

我已经成功了。使用maven和logback-classic，jars以WEB-INF/lib结尾，并且运行良好。
仅当部署旧版本的 WAR 时，我才看到相同的错误。

我的 pom.xml 的依赖项部分摘录

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>${slf4j.version}</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>0.9.21</version>
</dependency>

...以及我的 web.xml 的相关部分：

  <servlet>
    <servlet-name>LogbackViewStatusMessages</servlet-name>
    <servlet-class>ch.qos.logback.classic.ViewStatusMessagesServlet</servlet-class>
  </servlet>
  <!-- see http://localhost:8080/oam-portal-portlets/logs -->
  <servlet-mapping>
    <servlet-name>LogbackViewStatusMessages</servlet-name>
    <url-pattern>/logback</url-pattern>
  </servlet-mapping>

I've got it working. With maven and logback-classic the jars end in WEB-INF/lib and it works well.
I've seen the same error only when deploying old version of my WAR.

excerpt of dependencies section of my pom.xml

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>${slf4j.version}</version>
</dependency>
<dependency>
    <groupId>ch.qos.logback</groupId>
    <artifactId>logback-classic</artifactId>
    <version>0.9.21</version>
</dependency>

... and relevant part of my web.xml:

  <servlet>
    <servlet-name>LogbackViewStatusMessages</servlet-name>
    <servlet-class>ch.qos.logback.classic.ViewStatusMessagesServlet</servlet-class>
  </servlet>
  <!-- see http://localhost:8080/oam-portal-portlets/logs -->
  <servlet-mapping>
    <servlet-name>LogbackViewStatusMessages</servlet-name>
    <url-pattern>/logback</url-pattern>
  </servlet-mapping>

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聆听风音 2024-07-27 14:26:23

我还没有在 tomcat 中使用 logback-access 。我只将它与 jetty 一起使用...

不过，我建议尝试以下设置：

common/lib:
  logback-access-0.9.15.jar
  logback-classic-0.9.15.jar
  logback-core-0.9.15.jar
server/lib:
  logback-access-0.9.15.jar
  logback-core-0.9.15.jar

logback-access 将 logback-core 作为依赖项。由于您在服务器（Valve）和 Web 应用程序（ViewStatusMessagesServlet）中都使用它，因此您应该将其添加到两个类路径中。

您还可以（并且应该？）将 logback-access、logback-classic 和 logback-core 添加到您的 web 应用程序类路径中，而不是将其添加到 common/lib 中，使其可供所有 web 应用程序使用。

希望有帮助。

I haven't used logback-access with tomcat, yet. I only used it with jetty...

I'd suggest to try the following setup, though:

common/lib:
  logback-access-0.9.15.jar
  logback-classic-0.9.15.jar
  logback-core-0.9.15.jar
server/lib:
  logback-access-0.9.15.jar
  logback-core-0.9.15.jar

logback-access has logback-core as a dependency. Since you use it both in the server (the Valve) and in your webapp (the ViewStatusMessagesServlet) you should add it to both classpaths.

You could (and should?) also add logback-access, logback-classic and logback-core to your webapp classpath instead of adding it to common/lib, making it available to all webapps.

Hope that helps.

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