Hi Jason,
I finally manage to find a little time to verify that with other Oracle this
time. Basically I have used "generate-controller" and "generate-view"
on both the Race and Registration. The problem was associated with the registrations
property of the Race class. I clicked on "Edit" button on the "Show
Race" page to edit a race and clicked the "Update" button to get
the error. The error only showed up for the "old" race object that
had been created before the web server restart. New races created since the
restart are ok.
I can work around this issue by “touching” the registrations property before save the race object, as shown in
the RaceController.groovy:
def update = {
def race = Race.get(
params.id )
if(race) {
race.properties = params
////// touch the registrations property to work around the save()
failure on “old” race objects
//
System.out.println("race registrations: ${race.registrations.size()}----")
//////
if(race.save()) {
redirect(action:show,id:race.id)
}
else
{
render(view:'edit',model:[race:race])
}
}
else {
flash.message
= "Race not found with id ${params.id}"
redirect(action:edit,id:params.id)
}
}
I attach the exception here:
org.hibernate.LazyInitializationException: failed to lazily initialize a
collection of role: Race.registrations, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358)
at
org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350)
at
org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:343)
at
org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:163) at
org.codehaus.groovy.runtime.DefaultGroovyMethods.each(DefaultGroovyMethods.java:681)
at gjdk.org.hibernate.collection.PersistentSet_GroovyReflector.invoke(Unknown
Source) at
groovy.lang.MetaMethod.invoke(MetaMethod.java:115) at
org.codehaus.groovy.runtime.NewInstanceMetaMethod.invoke(NewInstanceMetaMethod.java:109)
at
org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:713)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:559) at
groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:449) at
org.codehaus.groovy.runtime.Invoker.invokePojoMethod(Invoker.java:129) at
org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:117) at
org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:111)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:187)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodNSafe(ScriptBytecodeAdapter.java:195)
at race_edit_gsp$_run_closure4.doCall(edit.gsp:85) 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.ReflectionMetaMethod.invoke(ReflectionMetaMethod.java:69)
at
org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:713)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:559) at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnCurrentN(ScriptBytecodeAdapter.java:97)
at race_edit_gsp$_run_closure4.doCall(edit.gsp) at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.groovy.runtime.ReflectionMetaMethod.invoke(ReflectionMetaMethod.java:69)
at
org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:713)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:559) at
groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:449) at
org.codehaus.groovy.runtime.Invoker.invokePogoMethod(Invoker.java:140) at
org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:121) at
org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:111)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodN(ScriptBytecodeAdapter.java:187)
at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeClosure(ScriptBytecodeAdapter.java:626)
at FormTagLib$_closure6.doCall(FormTagLib:145) at sun.reflect.GeneratedMethodAccessor71.invoke(Unknown
Source) at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597) at
org.codehaus.groovy.runtime.ReflectionMetaMethod.invoke(ReflectionMetaMethod.java:69)
at
org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:713)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:559) at
groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:449) at groovy.lang.Closure.call(Closure.java:188)
at
org.codehaus.groovy.grails.web.pages.GroovyPage.invokeTag(GroovyPage.java:200)
at gjdk.race_edit_gsp_GroovyReflector.invoke(Unknown Source) at
groovy.lang.MetaMethod.invoke(MetaMethod.java:115) at org.codehaus.groovy.runtime.MetaClassHelper.doMethodInvoke(MetaClassHelper.java:713)
at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:559) at
org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethodOnCurrentN(ScriptBytecodeAdapter.java:97)
at race_edit_gsp.run(edit.gsp:128) at
org.codehaus.groovy.grails.web.pages.GroovyPagesTemplateEngine$GroovyPageTemplateWritable.writeTo(GroovyPagesTemplateEngine.java:418)
at
org.codehaus.groovy.grails.web.pages.GroovyPagesServlet.doPage(GroovyPagesServlet.java:154)
at org.codehaus.groovy.grails.web.pages.GroovyPagesServlet.doPost(GroovyPagesServlet.java:116)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427) at
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:473)
at org.mortbay.jetty.servlet.Dispatcher.dispatch(Dispatcher.java:280) at
org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:171) at
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:112)
at
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:249)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1063)
at
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:827)
at
org.codehaus.groovy.grails.web.servlet.GrailsDispatcherServlet.doDispatch(GrailsDispatcherServlet.java:84)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:736)
at
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
at
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:360)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427) at
org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
at
org.codehaus.groovy.grails.web.servlet.filter.GrailsReloadServletFilter.doFilterInternal(GrailsReloadServletFilter.java:170)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at
org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at
com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
at
org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at
org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:78)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:138)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at
org.codehaus.groovy.grails.web.servlet.mvc.GrailsWebRequestFilter.doFilterInternal(GrailsWebRequestFilter.java:53)
at
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568) at
org.mortbay.http.HttpContext.handle(HttpContext.java:1565) at
org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:635)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1517) at
org.mortbay.http.HttpServer.service(HttpServer.java:954) at
org.mortbay.http.HttpConnection.service(HttpConnection.java:816) at
org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983) at
org.mortbay.http.HttpConnection.handle(HttpConnection.java:833) at
org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244) at
org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357) at
org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
-----邮件原件-----
发件人: Jason Rudolph [mailto:[hidden email]]
发送时间: 2007年1月23日 9:13
收件人: [hidden email]
主题: [grails-user] Re: 答复:
[grails-user] free Grails Book on infoq
Hi Bing,
Thanks for reporting this issue. You're probably the first person
to
test this app out on Grails 0.4 + JDK 6 + XP. (The sample app
is
known to work using Grails 0.3.1 and
JDK 5 on OS X and XP.) Can you
tell me where you are in the book, and I'll give it a try with the
current Grails 0.4 snapshot.
Also, if you have a moment, can you please list the exact steps
you
followed to get the error? For example...
1. Start app
2. Create new race
3. Add registration
...and so on
That level of detail would be greatly appreciated.
As a side note, I'll be verifying that this app works against 0.4
when we get ready for the official 0.4 release. So, any issues
that
you can find like this in advance are much appreciated.
Cheers,
Jason
On Jan 22, 2007, at 12:55 AM, Bing Ran wrote:
> Thanks for the free online book!
>
> I was following the book and I got an error when editing a
Race
> object that
> has a couple of registrations.
>
> Message: failed to lazily initialize a collection of role:
> Race.registrations, no session or session was closed
> Class: edit.gsp
> At Line: [67]
>
> The funny thing is that once I restarted the jetty server, it
always
> complained that there was no session available to instantiate the
lazy
> registrations property. This does not happen if I had kept the
server
> running in the same session as I have created the race and added
new
> registrations.
>
> Here is my config:
>
> Latest trunk from Grails + Embedded db + jdk1.6 + XP
>
> Any idea why this is happening?
>
> Thanks
>
> Bing
>
>
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