It's hibernate thing (I guess db connection timeout). What's your DB? mysql?
2010/10/29 cellterry <cellte...@gmail.com>: > > Dear all, > > I encountered LazyInitializationException today in my SSH project today as > follows. > >>>>>>>>LOG4J<<<<<<< 1 2010-10-29 17:37:42,454 [http-8080-2] ERROR > org.hibernate.LazyInitializationException - > #org.hibernate.LazyInitializationException.<init>(LazyInitializationException.java:19)# > - failed to lazily initialize a collection of role: model.Customer.people, > no session or session was closed > org.hibernate.LazyInitializationException: failed to lazily initialize a > collection of role: model.Customer.people, no session or session was closed > at > org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358) > at > org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350) > at > org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343) > at > org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86) > at > org.hibernate.collection.PersistentBag.iterator(PersistentBag.java:249) > at org.apache.struts2.json.JSONWriter.process(JSONWriter.java:155) > at org.apache.struts2.json.JSONWriter.value(JSONWriter.java:131) > at org.apache.struts2.json.JSONWriter.add(JSONWriter.java:329) > at org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:228) > at org.apache.struts2.json.JSONWriter.process(JSONWriter.java:165) > at org.apache.struts2.json.JSONWriter.value(JSONWriter.java:131) > at org.apache.struts2.json.JSONWriter.add(JSONWriter.java:329) > at org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:228) > ... > > > I had searched online and found that someone suggested to use > OpenSessionInViewFilter in web.xml like the following. However, it had no > effect to me and the same error still happened. > > <filter> > <filter-name>hibernateFilter</filter-name> > <filter-class> > > org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> > </filter> > <filter-mapping> > <filter-name>hibernateFilter</filter-name> > <url-pattern>*.action</url-pattern> > </filter-mapping> > > And someone suggested to set "lazy" to be true for many-to-one items in > hibernate xml. > However, after modifying the code another error happened as below. > >>>>>>>>LOG4J<<<<<<< 2 2010-10-29 17:46:59,907 [http-8080-2] ERROR > org.hibernate.LazyInitializationException - > #org.hibernate.LazyInitializationException.<init>(LazyInitializationException.java:19)# > - could not initialize proxy - no Session > org.hibernate.LazyInitializationException: could not initialize proxy - no > Session > at > org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:57) > at > org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:111) > at > org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.invoke(CGLIBLazyInitializer.java:150) > at model.Customer$$EnhancerByCGLIB$$4d304287.getAddress(<generated>) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:616) > at org.apache.struts2.json.JSONWriter.bean(JSONWriter.java:227) > at org.apache.struts2.json.JSONWriter.process(JSONWriter.java:165) > at org.apache.struts2.json.JSONWriter.value(JSONWriter.java:131) > at org.apache.struts2.json.JSONWriter.add(JSONWriter.java:329) > ... > > It is an ajax action and the result is in json format to be passed back. > > > <package name="ajax" namespace="/" extends="json-default"> > ... > <action name="getInfoByCustomer" class="ajaxGetInfoByCustomer"> > <result type="json" /> > </action> > ... > </package> > I attached here the action file and model files and also hibernate xmls. > > http://old.nabble.com/file/p30084356/GetInfoByCustomer.java > GetInfoByCustomer.java > http://old.nabble.com/file/p30084356/customer.person.hbm.xml > customer.person.hbm.xml > http://old.nabble.com/file/p30084356/Warehouse.java Warehouse.java > http://old.nabble.com/file/p30084356/CustomerPerson.java CustomerPerson.java > http://old.nabble.com/file/p30084356/Warehouse.java Warehouse.java > > Could anyone kindly to glance it? > > Terry. > > -- > View this message in context: > http://old.nabble.com/LazyInitializationException-tp30084356p30084356.html > Sent from the Struts - User mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@struts.apache.org > For additional commands, e-mail: user-h...@struts.apache.org > > -- Maurizio Cucchiara --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@struts.apache.org For additional commands, e-mail: user-h...@struts.apache.org
