记一次亲身踩过的hibernate的bug
记一次亲身踩过的hibernate的bug
在写实体类时，经常会对域增加校验，例如@NotNull表示哪个字段不能为空，昨天晚上调试代码，就遇到了问题，
@Entity
public class ApplicationCategory implements Serializable {
private static final long serialVersionUID = -8018302345969463947L;
@Id
@GeneratedValue
private Integer id;
@NotNull(message = "应用分类名称不能为空")
private String name;
private String remark;
@Override
public int hashCode() {
int result = id.hashCode();
result = 31 * result + name.hashCode();
result = 31 * result + (remark != null ? remark.hashCode() : 0);
return result;
}
.....
.....
//省略其他方法
}
程序启动，保存applicationCategory时，抛异常，错误如下：
2017-05-23 18:51:43.195 ERROR 16876 --- [http-nio-65009-exec-4] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is javax.validation.ValidationException: HV000041: Call to TraversableResolver.isReachable() threw an exception.] with root cause
java.lang.NullPointerException: null
at com.xxx.hhhh.cccc.machine.domain.ApplicationCategory.hashCode(ApplicationCategory.java:69)
at org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation$TraversableHolder.buildHashCode(CachingTraversableResolverForSingleValidation.java:143)
at org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation$TraversableHolder.<init>(CachingTraversableResolverForSingleValidation.java:104)
at org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation$TraversableHolder.<init>(CachingTraversableResolverForSingleValidation.java:86)
at org.hibernate.validator.internal.engine.resolver.CachingTraversableResolverForSingleValidation.isReachable(CachingTraversableResolverForSingleValidation.java:31)
at org.hibernate.validator.internal.engine.ValidatorImpl.isReachable(ValidatorImpl.java:1612)
at org.hibernate.validator.internal.engine.ValidatorImpl.isValidationRequired(ValidatorImpl.java:1597)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateMetaConstraint(ValidatorImpl.java:609)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:580)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForSingleDefaultGroupElement(ValidatorImpl.java:524)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:492)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:457)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:407)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:205)
at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:114)
at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:78)
at org.hibernate.action.internal.EntityIdentityInsertAction.preInsert(EntityIdentityInsertAction.java:197)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:75)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:619)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:273)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:254)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:299)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:317)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:272)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:178)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:109)
at org.hibernate.jpa.event.internal.core.JpaPersistEventListener.saveWithGeneratedId(JpaPersistEventListener.java:67)
at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:189)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:132)
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:58)
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:775)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:748)
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:753)
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1146)
at sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:347)
at com.sun.proxy.$Proxy113.persist(Unknown Source)
at sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:298)
at com.sun.proxy.$Proxy113.persist(Unknown Source)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:506)
at sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:503)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:488)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:460)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
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:213)
at com.sun.proxy.$Proxy126.save(Unknown Source)
at com.hikvision.hummer.pandora.machine.service.impl.ApplicationCategoryServiceImpl.save(ApplicationCategoryServiceImpl.java:42)
at com.hikvision.hummer.pandora.machine.service.impl.ApplicationCategoryServiceImpl$$FastClassBySpringCGLIB$$3748b453.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)
at com.hikvision.hummer.pandora.machine.service.impl.ApplicationCategoryServiceImpl$$EnhancerBySpringCGLIB$$2a6d0df9.save(<generated>)
at com.hikvision.hummer.pandora.controller.machine.MachineController.writeTestData1(MachineController.java:155)
at com.hikvision.hummer.pandora.controller.machine.MachineController.doTest(MachineController.java:123)
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.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
检查一下看到是validation报错，但是自己的变量的确已经赋值，并且提示hashCode代码有问题，但是我的代码都是IDE帮生成的，即使hashCode有问题，validation也不应该去调用此方法啊，@NotNull作用不是检查字段是否为空么，把@NotNull去掉或者换成@Column(nullable=false)就没问题。
在stackoverflow上找了答案https://stackoverflow.com/questions/30333779/javax-validation-validationexception-hv000041-call-to-traversableresolver-isre，发现正好有一位仁兄遇到相同的问题，有评论指出hashcode有问题，但是在save时，有的域对象确实为空，例如Integer Id，是数据库生成的，在save时肯定为null，但究竟是谁在save时调用了hashCode方法。
看到下面另外一条评论，也坚定了我的想法，这是hibernate的一个bug; 下面的又指出这是hibernate bug HV_1013，https://hibernate.atlassian.net/browse/HV-1013,在 5.3.0.CR1.修复.
看一下官方是怎么说的
A couple of comments.
SingleThreadCachedTraversableResolver (or CachingTraversableResolverForSingleValidation as it is called in later
versions of Validator is there to speed up TraversableResolver calls by caching calls to this class during a single
validation call. How much this really improves the performance is a good question. This caching approach has been
around since Validator 4 and it might be worth checking the actual benefit of this implementation.
Secondly, I was about to suggest that you can always plugin your own implementation of a TraversableResolver in
case you want to bypass CachingTraversableResolverForSingleValidation, but I actually think we wrap any configured
TraversableResolver into this caching one. There I think it would be beneficial to provide a configuration
property which allows to bypass the caching.
Last but not least, regardless of any potential changes in Validator, I suggest to change your hashCode
implementation to take into account potential null values. What if you are going to use an instance of your class
in a Collection or Map or something similar. You will get exceptions in this case as well. Bean Validation occurs
at given life cycle events, for example in the case of JPA during pre-persist. This means that until you call
persist followed by a explicit flush or transaction commit, your entity will be un-validated. What if your entity
is used in a one to many relation ship. Again you would get exceptions while still assembling your final object
graph to persist. IMO hashCode must deal with potentially null values if it is possible that an instance can exist
in a state where the value is null (even if from a business point of view the field is mandatory).
三条观点，
为什么会调用hashCode 大体意思是好像加快什么，提升性能, 官方已承认是bug，在后面的版本进行了修改。
对TraversalbeResolver自己实现
最后一条，完善hashCode，因为自身带码本身就有潜在的空值
采用了最后一条，将hashCode重写 如下
@Override
public int hashCode() {
int result = id != null ? id.hashCode() : 0;
result = 31 * result + (name != null ? name.hashCode() : 0);
result = 31 * result + (remark != null ? remark.hashCode() : 0);
return result;
}
记一次亲身踩过的hibernate的bug的更多相关文章
- Java小菜求职记-以前在Dubbo踩的坑，这次全被问到了，这下舒服了
前传 小林求职记(五)上来就一连串的分布式缓存提问,我有点上头.... 终于,在小林的努力下,获得了王哥公司那边的offer,但是因为薪水没有谈妥,小林又重新进入了求职的旅途,在经历了多次求职过程之后 ...
- 记一次亲身体验的勒索病毒事件 StopV2勒索病毒
昨天给笔记本装了 windows server 2016 操作系统,配置的差不多之后,想使用注册机激活系统.使用了几个本地以前下载的注册机激活失败后,尝试上网搜索. 于是找到下面这个网站(这个网站下载 ...
- 记一次lombok踩坑记
引言 今天中午正在带着耳机遨游在代码的世界里,被运营在群里@了,气冲冲的反问我最近有删生产的用户数据的吗?我肯定客气的回答道没有呀?生产的数据我怎么能随随便便可以删除,这可是公司的红线,再说了我也没有 ...
- 记安装AWVS14过程踩的坑
由于之前的AWVS14用着用着无法扫描了,一扫就是失败,一气之下就重装系统了.重装系统后发现安装还是不行,折腾了好久,终于找到方法了. 安装acunetix_14.1.210324124.exe 没啥 ...
- hibernate日常BUG总结
在使用hibernate自动生产表的时候失败, 是配置文件我是从别地方拷贝过来忘记更改,所以报了这个错误. 重新命名了生成表的名称,问题解决! 问题很明显,自动增长的主键应该使用整型. 这里写的是St ...
- wordpress插件bug排查后记（记一次由于开启memecached引起的插件bug）
这篇文章是写给自己的. 周三的时候我在维护公司的一个wordpress项目页面时发现了一个非常奇怪的情况:当我尝试更新网站上的一个页面后,在wordpress后台的编辑器中发现其内容并没有按我预期的将 ...
- 记VUE的v-on:textInput无法执行事件的BUG
<div id="wrap"> <input type="text" v-on:textInput="fn"> &l ...
- 【Unity游戏开发】记一次解决 LuaFunction has been disposed 的bug的过程
一.引子 RT,本篇博客记录的是马三的一次解决 LuaFunction has been disposed 的bug的全过程,事情还要从马三的自研框架 ColaFrameWork 说起.最近,马三在业 ...
- [BUG]自己的bug自己解，记一次在变量使用过程引发的bug
[实现的功能要求]在短信编辑界面,将所有的emoji表情全部插入到编辑区域,其中表情共有5页,每遍历完一页时需要自动翻页重新获取表情并插入,在第5页中只有10个表情 下面先看看这段代码,大家能否看出有 ...
随机推荐
- Git版本切换
前面的话 本文将以一个简单实例的形式来介绍Git版本切换 初始版本 首先,在一个自定义的位置,创建目录a,比如在D盘下 [注意]本文会用到一些常用的Linux的Shell命令,详细信息移步至此 先使用 ...
- toastr.js插件用法
toastr.js插件用法 toastr.js是一个基于jQuery的非阻塞通知的JavaScript库.toastr.js可以设定四种通知模式:成功.出错.警告.提示.提示窗口的位置.动画效果等都可 ...
- Google官方MVP模式示例项目解析 todo-mvp
转载请注明出处:http://www.cnblogs.com/cnwutianhao/p/6700668.html 引言:在Google没有给出一套权威的架构实现之前,很多App项目在架构方面都有或多 ...
- JS数组根据属性来实现排序
var data = [{ name: "zhao", age: }, { name: "qian", age: }, { name: "sun&qu ...
- Doctype 文档类型，标准模式，混杂模式
HTML4.01和XHTML1.0 基于 SGML,支持DTD声明,HTML5不是,但是需要 doctype 来规范浏览器的行为. 标准模式是指,DTD声明定义了标准文档的类型后,浏览器按W3C标准解 ...
- 【C和指针】笔记1
数据 基本数据类型 整型家族:包含字符,短整型,整型和长整型 整型相互之间大小规定如下: 长整型至少和整型一样长,而整型至少应该和短整型一样长. short int至少16位,long int至少32 ...
- javascript中json对象json数组json字符串互转及取值
今天用到了json数组和json对象和json类型字符串之间互转及取值,记录一下: 1.json类型的字符串转换为json对象及取值 var jsonString = '{"bar" ...
- 简单的利用JS来判断页面是在手机端还是在PC端打开的方法
在移动设备应用越来越广泛的今天,许多网站都开始做移动端的界面展示,两者屏幕尺寸差异很大,所以展示的内容也有所差别.于是就遇到一个问题,如何判断你的页面是在移动端还是在PC端打开的,很简单的问题,那我们 ...
- C# 调用C++dll出现的问题。
问题描述: 对 PInvoke 函数“winform应用!winform应用.Form1::add”的调用导致堆栈不对称.原因可能是托管的 PInvoke 签名与非托管的目标签名不匹配.请检查 PIn ...
- configure: error: Cannot find php-config. Please use --with-php-config=PATH 错误的解决方案
一般出现这个错误说明你执行 ./configure 时 --with-php-config 这个参数配置路径错误导致的. 修改为: ./configure --with-php-config=/us ...