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我们在 JSP Web 应用程序上使用 java 1.4,有时我们的 Web 应用程序会完全停止。当用户尝试访问主页时,他们得到的页面找不到。

发生这种情况时,我们运行堆栈转储并使用 samurai 我可以看到多个阻塞线程具有相同的消息

at java.util.Collections$SynchronizedMap.get(Collections.java:1942)      
- waiting to lock <0x23e40898> (a 
java.util.Collections$SynchronizedMap)      at 
org.hibernate.tuple.EntityModeToTuplizerMapping.getTuplizerOrNull(EntityModeToTuplizerMapping.java:53)      at 
org.hibernate.tuple.EntityModeToTuplizerMapping.getTuplizer(EntityModeToTuplizerMapping.java:66)      at 
org.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:353)      at 
org.hibernate.type.ComponentType.toLoggableString(ComponentType.java:379)      at 
org.hibernate.pretty.MessageHelper.infoString(MessageHelper.java:89)      at 
org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1355)      at 
org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1308)      at org.hibernate.loader.Loader.getRow(Loader.java:1206) 
     at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:580)      at 
org.hibernate.loader.Loader.doQuery(Loader.java:701)      at 
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)      at 
org.hibernate.loader.Loader.doList(Loader.java:2220)      at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104) 
     at org.hibernate.loader.Loader.list(Loader.java:2099)      at 
org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378)      at 
org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)      at 
org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)      at 
org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)      at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)      at 
org.springframework.orm.hibernate3.HibernateTemplate$29.doInHibernate(HibernateTemplate.java:849)      at
org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:372)      at 
org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:840)      at
org.springframework.orm.hibernate3.HibernateTemplate.find(HibernateTemplate.java:836)

我怎样才能确定是什么阻碍了这个线程。有什么工具可以用来识别吗?

谢谢


嗨,Mprivat,非常感谢。我也会把它带给我们的建筑师,看看我们是否可以完成这个升级。由于这只是每隔一段时间才会发生一次,因此需要一些时间才能确定这是否是原因。我会在几个月后反馈,因为只有时间才能告诉我们。多谢

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根据其他研究,在我之前的答案之前:

Sounds like you are using a Hibernate version older than 3.2.6 (where they addressed this defect). Defect ID: HHH-2645

http://lists.jboss.org/pipermail/hibernate-issues/2008-February/009043.html


Normally, you should be able to match the "waiting to lock <0x23e40898>" messages with a "setting lock <0x23e40898>" message (spelling may wary). Do a complete stack dump (you can use jstack by the way, it's standard with the JDK), and search for your lock ID. You'll see a bunch of waits, but also the thread that sets it.

于 2012-07-05T13:58:24.413 回答