HTTP Status 500 – Internal Server Error
Type Exception Report
Message Handler dispatch failed; nested exception is java.lang.AbstractMethodError: Method oracle/jdbc/driver/T4CPreparedStatement.isClosed()Z is abstract
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.AbstractMethodError: Method oracle/jdbc/driver/T4CPreparedStatement.isClosed()Z is abstract
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1053)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
Root Cause
java.lang.AbstractMethodError: Method oracle/jdbc/driver/T4CPreparedStatement.isClosed()Z is abstract
oracle.jdbc.driver.T4CPreparedStatement.isClosed(T4CPreparedStatement.java)
net.sf.log4jdbc.sql.jdbcapi.StatementSpy.isClosed(StatementSpy.java:860)
org.apache.ibatis.executor.BaseExecutor.closeStatement(BaseExecutor.java:285)
org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:65)
org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:326)
org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:136)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
com.sun.proxy.$Proxy8.selectList(Unknown Source)
org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:222)
com.example.spring01.model.dao.MemberDAOImpl.memberList(MemberDAOImpl.java:29)
com.example.spring01.service.MemberServiceImpl.memberList(MemberServiceImpl.java:20)
com.example.spring01.controller.MemberController.memberList(MemberController.java:28)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
Note The full stack trace of the root cause is available in the server logs.
Apache Tomcat/8.5.41
5월 31, 2019 10:46:54 오전 org.apache.catalina.core.StandardWrapperValve invoke
심각: Servlet.service() for servlet [appServlet] in context with path [/spring01] threw exception [Handler dispatch failed; nested exception is java.lang.AbstractMethodError: Method oracle/jdbc/driver/T4CPreparedStatement.isClosed()Z is abstract] with root cause
java.lang.AbstractMethodError: Method oracle/jdbc/driver/T4CPreparedStatement.isClosed()Z is abstract
에러 해결
메이븐 프로젝트는 pom.xml에서 라이브러리를 기본적으로 다운받아 사용하는데 JRE 라이브러리 안에 JDBC 2개가 중복해서 존재하였고, 이 점때문에 서로 충돌해서 안되었던 것이었다. JRE 라이브러리 안에 JDBC 2개를 삭제하였더니 정상적으로 출력되었음
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