WSO2 Identity Server 6.1 JSP类编译失败问题求助

错误原因 #

该错误说明JSP编译器尝试导入org.wso2.carbon.identity.application.authentication.endpoint.util.TemplateMgtAPIClient时，无法找到对应的类，反而将其识别为一个包，通常由以下情况导致：

• 目标类未被正确编译生成
• 类所在的jar包未部署到authenticationendpoint应用的类路径中
• JSP中的导入语句存在拼写错误

解决方案 #

• 检查类的存在性

  1. 确认源码中org.wso2.carbon.identity.application.authentication.endpoint.util包下是否存在TemplateMgtAPIClient.java文件
  2. 查看编译后的target目录，确认是否生成了TemplateMgtAPIClient.class文件（路径通常为target/classes/org/wso2/carbon/identity/application/authentication/endpoint/util/）

• 验证类路径配置

  1. 检查<IS_HOME>/repository/deployment/server/webapps/authenticationendpoint/WEB-INF/lib目录，确认包含该类的jar包是否存在
  2. 若为源码编译部署，确认authenticationendpoint模块的pom.xml中是否正确依赖了包含TemplateMgtAPIClient的模块

• 清理并重新编译部署

  1. 删除Tomcat工作目录下的缓存文件：rm -rf /usr/lib/wso2/wso2is/6.1.0/lib/tomcat/work/Catalina/localhost/authenticationendpoint
  2. 清理项目编译缓存：执行mvn clean
  3. 重新编译打包：执行mvn install -DskipTests
  4. 重新部署WSO2 IS并启动服务

• 检查JSP导入语句
  打开dynamic_prompt.jsp文件，确认导入语句是否正确，示例正确写法：

  <%@ page import="org.wso2.carbon.identity.application.authentication.endpoint.util.TemplateMgtAPIClient" %>
  

  检查是否存在类名拼写错误，或误将类导入写成包导入（如org.wso2.carbon.identity.application.authentication.endpoint.util.*但包内无对应类）

错误日志 #

[2023-08-03 16:57:33,988] [] ERROR {org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/authenticationendpoint]} - Servlet [dynamic_prompt.do] in web application [/authenticationendpoint] threw load() exception org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: [18] in the generated java file: [/usr/lib/wso2/wso2is/6.1.0/lib/tomcat/work/Catalina/localhost/authenticationendpoint/org/apache/jsp/dynamic_005fprompt_jsp.java]
Only a type can be imported. org.wso2.carbon.identity.application.authentication.endpoint.util.TemplateMgtAPIClient resolves to a package

Stacktrace:
    at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
    at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:213)
    at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:498)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:397)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:367)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:351)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:605)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:399)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:379)
    at org.apache.jasper.servlet.JspServlet.init(JspServlet.java:135)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1164)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1117)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1010)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5264)

内容的提问来源于stack exchange，提问作者Raghav