HTTP Status 500 - Request processing failed; nested exception is org.springframework.dao.DuplicateKeyException:

type Exception report

message Request processing failed; nested exception is org.springframework.dao.DuplicateKeyException:

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.dao.DuplicateKeyException: 
### Error updating database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
### The error may involve com.mmall.dao.UserMapper.insert-Inline
### The error occurred while setting parameters
### SQL: insert into mmall_user (id, username, password,       email, phone, question,       answer, role, create_time,       update_time)     values (?, ?, ?,       ?, ?, ?,       ?, ?, now(),       now())
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
; SQL []; Duplicate entry 'admin' for key 'user_name_unique'; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:943)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

root cause

org.springframework.dao.DuplicateKeyException: 
### Error updating database.  Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
### The error may involve com.mmall.dao.UserMapper.insert-Inline
### The error occurred while setting parameters
### SQL: insert into mmall_user (id, username, password,       email, phone, question,       answer, role, create_time,       update_time)     values (?, ?, ?,       ?, ?, ?,       ?, ?, now(),       now())
### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
; SQL []; Duplicate entry 'admin' for key 'user_name_unique'; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
	org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:239)
	org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
	org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:447)
	com.sun.proxy.$Proxy19.insert(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:279)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:57)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
	com.sun.proxy.$Proxy20.insert(Unknown Source)
	com.mmall.service.impl.UserServiceImpl.register(UserServiceImpl.java:53)
	com.mmall.controller.portal.UserController.register(UserController.java:65)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
	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:748)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

root cause

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'user_name_unique'
	sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
	com.mysql.jdbc.Util.getInstance(Util.java:381)
	com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)
	com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
	com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
	com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
	com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
	com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
	com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)
	com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)
	com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:995)
	org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
	org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59)
	com.sun.proxy.$Proxy25.execute(Unknown Source)
	org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:46)
	org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74)
	org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50)
	org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
	org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
	com.sun.proxy.$Proxy23.update(Unknown Source)
	org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)
	org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:434)
	com.sun.proxy.$Proxy19.insert(Unknown Source)
	org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:279)
	org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:57)
	org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
	com.sun.proxy.$Proxy20.insert(Unknown Source)
	com.mmall.service.impl.UserServiceImpl.register(UserServiceImpl.java:53)
	com.mmall.controller.portal.UserController.register(UserController.java:65)
	sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
	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:748)
	org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
	org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
	org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
	org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
	org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)
	org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
	org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

note The full stack trace of the root cause is available in the Apache Tomcat/7.0.75 logs.