请大神指教这是什么错误？什么原因？如何解决。跪谢！~

[2018-03-05 10:57:31.465] [ERROR] [DubboServerHandler-192.168.0.147:20881-thread-39] [com.alibaba.dubbo.rpc.filter.ExceptionFilter] >>> [DUBBO] Got unchecked and undeclared exception which called by 192.168.0.147. service: com.broad.research.ucar.service.VoteService, method: getVoteList, exception: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named '__frch_criterion_2' in 'class com.broad.research.ucar.pojo.UcarGuessVoteTopicExample', dubbo version: 2.5.3, current host: 127.0.0.1

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named '__frch_criterion_2' in 'class com.broad.research.ucar.pojo.UcarGuessVoteTopicExample'

at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)

at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371)

at com.sun.proxy.$Proxy36.selectList(Unknown Source)

at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198)

at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:119)

at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63)

at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)

at com.sun.proxy.$Proxy194.selectByExample(Unknown Source)

at com.broad.research.ucar.service.impl.VoteServiceImpl.getVoteList(VoteServiceImpl.java:217)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)

at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)

at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)

at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)

at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)

at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)

at com.sun.proxy.$Proxy199.getVoteList(Unknown Source)

at com.alibaba.dubbo.common.bytecode.Wrapper35.invokeMethod(Wrapper35.java)

at com.alibaba.dubbo.rpc.proxy.javassist.JavassistProxyFactory$1.doInvoke(JavassistProxyFactory.java:46)

at com.alibaba.dubbo.rpc.proxy.AbstractProxyInvoker.invoke(AbstractProxyInvoker.java:72)

at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53)

at com.alibaba.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:64)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:42)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:78)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:60)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:112)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:38)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:38)

at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)

at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:108)

at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:84)

at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:170)

at com.alibaba.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:52)

at com.alibaba.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:82)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:748)

Caused by: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named '__frch_criterion_2' in 'class com.broad.research.ucar.pojo.UcarGuessVoteTopicExample'

at org.apache.ibatis.reflection.Reflector.getGetInvoker(Reflector.java:380)

at org.apache.ibatis.reflection.MetaClass.getGetInvoker(MetaClass.java:170)

at org.apache.ibatis.reflection.wrapper.BeanWrapper.getBeanProperty(BeanWrapper.java:152)

at org.apache.ibatis.reflection.wrapper.BeanWrapper.get(BeanWrapper.java:48)

at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:116)

at org.apache.ibatis.reflection.MetaObject.metaObjectForProperty(MetaObject.java:138)

at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:109)

at com.github.pagehelper.SqlUtil$SimpleParser.setPageParameter(SqlUtil.java:256)

at com.github.pagehelper.SqlUtil$MysqlParser.setPageParameter(SqlUtil.java:278)

at com.github.pagehelper.SqlUtil.setPageParameter(SqlUtil.java:132)

at com.github.pagehelper.SqlUtil.processPageMappedStatement(SqlUtil.java:157)

at com.github.pagehelper.PageHelper.intercept(PageHelper.java:154)

at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:60)

at com.sun.proxy.$Proxy215.query(Unknown Source)

at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)

at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)

... 50 more

[2018-03-05 10:57:31.473] [ERROR] [DubboServerHandler-192.168.0.147:20881-thread-40] [com.alibaba.dubbo.rpc.filter.ExceptionFilter] >>> [DUBBO] Got unchecked and undeclared exception which called by 192.168.0.147. service: com.broad.research.ucar.service.VoteService, method: getVoteList, exception: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: There is no getter for property named '__frch_criterion_2' in 'class com.broad.research.ucar.pojo.UcarGuessVoteTopicExample', dubbo version: 2.5.3, current host: 127.0.0.1