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HV000028: Unexpected exception during isValid call.
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javax.validation.ValidationException: HV000028: Unexpected exception during isValid call. at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:451)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:127)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateConstraints(ConstraintTree.java:87)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:73)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:621)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:584)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:528)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:496)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:461)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:411)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:208)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:114)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:78)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.action.internal.EntityIdentityInsertAction.preInsert(EntityIdentityInsertAction.java:197)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:75)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:619)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:273)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:254)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:299)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:317)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:272)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:178)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:109)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:67)[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:775)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:748)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:753)[hibernate-core-5.0.12.Final.jar:5.0.12.Final] at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1146)[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_151] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_151] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_151] at java.lang.reflect.Method.invoke(Method.java:498)[na:1.8.0_151] at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:347)[spring-orm-4.3.13.RELEASE.jar:4.3.13.RELEASE] at com.sun.proxy.$Proxy99.persist(Unknown Source)[na:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_151] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_151] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_151] at java.lang.reflect.Method.invoke(Method.java:498)[na:1.8.0_151] at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298)[spring-orm-4.3.13.RELEASE.jar:4.3.13.RELEASE] at com.sun.proxy.$Proxy99.persist(Unknown Source)[na:na] at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:508)[spring-data-jpa-1.11.9.RELEASE.jar:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_151] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_151] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_151] at java.lang.reflect.Method.invoke(Method.java:498)[na:1.8.0_151] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:520)[spring-data-commons-1.13.9.RELEASE.jar:na] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:505)[spring-data-commons-1.13.9.RELEASE.jar:na] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:477)[spring-data-commons-1.13.9.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:56)[spring-data-commons-1.13.9.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)[spring-tx-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)[spring-tx-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)[spring-tx-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)[spring-tx-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)[spring-data-jpa-1.11.9.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:57)[spring-data-commons-1.13.9.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)[spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE] at com.sun.proxy.$Proxy101.save(Unknown Source)[na:na] at uz.upay.service.MerchantUserServiceImpl.createUser(MerchantUserServiceImpl.java:52)[classes/:na] at uz.upay.controller.AuthController.createUser(AuthController.java:79)[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[na:1.8.0_151] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[na:1.8.0_151] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[na:1.8.0_151] at java.lang.reflect.Method.invoke(Method.java:498)[na:1.8.0_151] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)[spring-webmvc-4.3.13.RELEASE.jar:4.3.13.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)[tomcat-embed-websocket-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:114)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:170)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:64)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)[spring-security-web-4.2.3.RELEASE.jar:4.2.3.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)[spring-web-4.3.13.RELEASE.jar:4.3.13.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)[tomcat-embed-core-8.5.23.jar:8.5.23] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)[tomcat-embed-core-8.5.23.jar:8.5.23] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[na:1.8.0_151] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[na:1.8.0_151] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)[tomcat-embed-core-8.5.23.jar:8.5.23] at java.lang.Thread.run(Thread.java:748)[na:1.8.0_151]Caused by: java.lang.NullPointerException: null at uz.upay.validator.EmailValidator.isValid(EmailValidator.java:23)[classes/:na] at uz.upay.validator.EmailValidator.isValid(EmailValidator.java:10)[classes/:na] at org.hibernate.validator.internal.engine.constraintvalidation.ConstraintTree.validateSingleConstraint(ConstraintTree.java:448)[hibernate-validator-5.3.6.Final.jar:5.3.6.Final] ... 156 more