[#GRAILS-4453] org.hibernate.AssertionFailure: collection [...] was not processed by flush() when changing child records in beforeXXX event methods in parent record - Grails JIRA

Details

Type: Bug
Status: Closed
Priority: Critical
Resolution: Fixed
Affects Version/s: 1.1
Fix Version/s: 1.2-M2
Component/s: Persistence
Labels:
None

Description

I could not get this error to occur in a test unfortunately, but occurs just fine in a controller. See the 3 domain classes below. The problem seems to be with changing the child in the beforeUpdate of the Parent. The error complains that the subChilds (children of Child) were not processed by the flush.

Parent.groovy

class Parent {
    static hasMany = [ childs : Child ]

    def beforeUpdate =
    {
        calc()
    }

    def calc =
    {
        this.childs.each {it.s = "change"}
    }
}

Child.groovy

class Child {
    static belongsTo = [Parent];
    static hasMany = [ subChilds : SubChild ]
    String s    
}

SubChild.groovy

class SubChild {
    static belongsTo = [Child];
    String s
}

WooController.groovy

class WooController {

    def index = {
        Parent p = Parent.get(1)
        p.addToChilds(new Child(s:"testy"))
        Parent.withTransaction
        {
            p.save(flush:true)
        }
        render "${p} -> ${p.childs}"
    }
}

bootstrap.groovy

class BootStrap {
    def init = { servletContext ->
        Parent p1 = new Parent().save(flush:true)
        p1.save(flush:true)
    }
    def destroy = {}
}

Run the app. Now the first time you go to

 http://localhost:8080/<appname>/woo

you get:
Parent : 1 -> [Child : 1]
As expected. But if you refresh the page again you get the error:

2009-03-16 22:09:10,682 [1834410164@qtp0-0] ERROR hibernate.AssertionFailure - an assertion failure occured (this may indicate a bug in Hibernate, but is more likely due to unsafe use of the session)
org.hibernate.AssertionFailure: collection [Child.subChilds] was not processed by flush()
at org.hibernate.engine.CollectionEntry.postFlush(CollectionEntry.java:228)
at org.hibernate.event.def.AbstractFlushingEventListener.postFlush(AbstractFlushingEventListener.java:356)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027)
at org.springframework.orm.hibernate3.HibernateTemplate$28.doInHibernate(HibernateTemplate.java:892)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.flush(HibernateTemplate.java:890)
at org.codehaus.groovy.grails.orm.hibernate.metaclass.SavePersistentMethod$1.doInHibernate(SavePersistentMethod.java:56)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:419)
at org.springframework.orm.hibernate3.HibernateTemplate.execute(HibernateTemplate.java:339)
at org.codehaus.groovy.grails.orm.hibernate.metaclass.SavePersistentMethod.performSave(SavePersistentMethod.java:52)
at org.codehaus.groovy.grails.orm.hibernate.metaclass.AbstractSavePersistentMethod.doInvokeInternal(AbstractSavePersistentMethod.java:113)
at org.codehaus.groovy.grails.orm.hibernate.metaclass.AbstractDynamicPersistentMethod.invoke(AbstractDynamicPersistentMethod.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoCachedMethodSite.invoke(PojoMetaMethodSite.java:188)
at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:52)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:132)
at org.codehaus.groovy.grails.plugins.orm.hibernate.HibernatePluginSupport$_addBasicPersistenceMethods_closure61.doCall(HibernatePluginSupport.groovy:588)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:86)
at org.codehaus.groovy.runtime.metaclass.ClosureMetaMethod.invoke(ClosureMetaMethod.java:81)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoMetaMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:307)
at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.call(PogoMetaMethodSite.java:63)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124)
at WooController$_closure1_closure2.doCall(WooController.groovy:8)
...

org.hibernate.AssertionFailure: collection [...] was not processed by flush() when changing child records in beforeXXX event methods in parent record

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