HTTP Status 500 – Internal Server Error


Type Exception Report

Message Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:963)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:195)
	org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:159)
	org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
	org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
	org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
	com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:65)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)

Root Cause

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
	org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:365)
	com.sun.proxy.$Proxy11.selectOne(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:160)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:95)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:40)
	com.sun.proxy.$Proxy12.getTeamsProfileByEmailPrefix(Unknown Source)
	com.unikl.biz.dao.ResearcherPortalDao.getExpertByEmailPrefix(ResearcherPortalDao.java:148)
	com.unikl.controller.ResearcherPortalController.view(ResearcherPortalController.java:263)
	sun.reflect.GeneratedMethodAccessor336.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:195)
	org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:159)
	org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
	org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
	org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
	com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:65)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)

Root Cause

org.apache.ibatis.exceptions.TooManyResultsException: Expected one result (or null) to be returned by selectOne(), but found: 2
	org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:63)
	sun.reflect.GeneratedMethodAccessor326.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:355)
	com.sun.proxy.$Proxy11.selectOne(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:160)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:95)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:40)
	com.sun.proxy.$Proxy12.getTeamsProfileByEmailPrefix(Unknown Source)
	com.unikl.biz.dao.ResearcherPortalDao.getExpertByEmailPrefix(ResearcherPortalDao.java:148)
	com.unikl.controller.ResearcherPortalController.view(ResearcherPortalController.java:263)
	sun.reflect.GeneratedMethodAccessor336.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
	org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
	org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:743)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:672)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:82)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:933)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
	org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:626)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:733)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:195)
	org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:159)
	org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:141)
	org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:90)
	org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:417)
	com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:65)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:106)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/8.5.64