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
- TextField和TextView
本文概要 1.简介 2.介绍TextField控件 3.介绍TextView控件 4.键盘的打开和关闭 5.关闭和大开键盘的通知 6.键盘的种类 详情 1.简介 与Label一样,TextField和 ...
- 万能数据库连接类-Oracle、DB2 、Access 、Sql Server
package cc.apps.report; import java.sql.Connection; import java.sql.DriverManager; import java.sql ...
- 学习Sass之安装篇
Sass是基于ruby开发的,所以想要用Sass要先搭建ruby环境 1 Mac下安装 2 windows下安装 3 下载koala,只需要下载这个软件,其余什么都不需要你安装
- 移动端WEBAPP开发遇到的坑，以及填坑方案！持续更新~~~~
前言:在移动端WEBAPP开发中会遇到各种各样的问题,通过此文对遇到的问题做一个归纳总结,方便自己日后查询,也给各位前端开发友人做一个参考. 此文中涉及的问题是本人开发中遇到的,解决方案是本人思考 ...
- Python多层目录模块调用
一. 引用模块在 父+级目录中: 1. 将导入模块所在目录(../model/模块)添加到系统环境变量path下,可添加多个 import syssys.path.append("../mo ...
- IO流输入 输出流 字符字节流
一.流 1.流的概念 流是一组有顺序的,有起点和终点的字节集合,是对数据传输的总称或抽象.即数据在两设备间的传输称为流,流的本质是数据传输,根据数据传输特性将流抽象为各种类,方便更直观的进行数据操作. ...
- C#并行编程--命令式数据并行（Parallel.Invoke）
命令式数据并行 Visual C# 2010和.NETFramework4.0提供了很多令人激动的新特性,这些特性是为应对多核处理器和多处理器的复杂性设计的.然而,因为他们包括了完整的新的特性,开 ...
- 从花式swap引出的pointer aliasing问题
上次,一个同学问我,你知不知道可以不用引入中间变量就可以实现swap? 我说,我知道,可以用加减法或者异或实现,像是这样 void mySwap(int &x,int &y) { x= ...
- JS的块级作用域
今天带来的是 "对<你不知道的js>中块级作用域的总结" 分享: 1)用with从对象中创建出来的作用域只在with声明中而非外部作用域有效,同时可以访问已有对象的属性 ...
- 03(3) 基于GMM-HMM的SR基础
1.GMM-HMM的训练 1)训练GSM-HMM (1)确定HMM拓扑结构 (2)初始化HMM模型参数 (3)在所有的utterances中计算所需的统计量 (4)使用公式更新模型参数 (5)不收敛, ...