Could not find constructor warning in logs

[rangler2]

Hi,

Since using the module I have Lots of these warnings in the Sitecore logs:

ManagedPoolThread #10 15:20:11 WARN Could not find constructor in ReflectionUtil.CreateObject: JCore.SitecoreModules.ImageCropping.Data.Fields.ExtendedImageField. The constructor parameters may not match or it may be an abstract class. Parameter info: Count: 1. Parameter types: Sitecore.Data.Fields.Field

Not sure exactly when they occur but seem to be a lot when installing packaged items. Have you had this in your logs?
Thanks

[jcore]

I added a constructor with Field signature which should eliminate the exception. However, I need to look more into the reason why this constructor is required, because none of other custom fields seem to need it.

[rangler2]

Hi,

This fix seems to cause other errors. For example if you call Item.Links.GetValidLinks() then it throws the following exception:

ManagedPoolThread #19 09:31:33 ERROR Could not update index entry. Action: 'Saved', Item: '{FA745EEE-94B8-4FFC-AFB6-1BDA853ED91E}'
Exception: System.Reflection.TargetInvocationException
Message: Exception has been thrown by the target of an invocation.
Source: mscorlib
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.ConstructorInfo.Invoke(Object[] parameters)
at Sitecore.Reflection.ReflectionUtil.CreateObject(Type type, Object[] parameters)
at Sitecore.Data.Fields.FieldType.GetField(Field field)
at Sitecore.Data.Fields.FieldTypeManager.GetField(Field field, String runtimeValue)
at Sitecore.Links.ItemLinks.AddLinks(Field field, List`1 links, ItemLinkState linkState)
at Sitecore.Links.ItemLinks.GetLinks(ItemLinkState linkState, Boolean allVersions, Boolean includeStandardValuesLinks)
at Sitecore.Search.Crawlers.DatabaseCrawler.GetItemLinks(Item item)
at Sitecore.Search.Crawlers.DatabaseCrawler.AddSpecialFields(Document document, Item item)
at Sitecore.Search.Crawlers.DatabaseCrawler.IndexVersion(Item item, Item latestVersion, IndexUpdateContext context)
at Sitecore.Search.Crawlers.DatabaseCrawler.AddItem(Item item, IndexUpdateContext context)
at Sitecore.Search.Crawlers.DatabaseCrawler.AddItem(Item item)
at System.EventHandler.Invoke(Object sender, EventArgs e)
at Sitecore.Data.Managers.IndexingProvider.UpdateItem(HistoryEntry entry, Database database)
at Sitecore.Data.Managers.IndexingProvider.UpdateIndex(HistoryEntry entry, Database database)

Nested Exception

Exception: System.NullReferenceException
Message: Object reference not set to an instance of an object.
Source: Sitecore.Kernel
at Sitecore.Web.UI.Sheer.SheerResponse.SetAttribute(String id, String name, String value)
at Sitecore.Web.UI.HtmlControls.Control.set_Class(String value)
at Sitecore.Shell.Applications.ContentEditor.Image..ctor()

This gets called, for this example, when the item is updated in the search index, then this error comes up in the logs...

[kjetilb]

Hi we face a similar issue using this component on Sitecore 7.2 (rev. 140228)

The issue arises when we publish an item that uses the image cropper module. And we get the following error message in the body of the publishing wizard

Job started: Publish to 'web'|#Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Sitecore.Web.UI.Sheer.ClientPage..ctor()
at Sitecore.Web.UI.Sheer.SheerResponse.SetAttribute(String id, String name, String value)
at Sitecore.Web.UI.HtmlControls.Control.set_Class(String value)
at Sitecore.Shell.Applications.ContentEditor.Image..ctor()
at JCore.SitecoreModules.ImageCropping.Data.Fields.ExtendedImageField..ctor(Field field) in \JCore.SitecoreModules.ImageCropping\Data\Fields\ExtendedImageField.cs:line 34
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Sitecore.Reflection.ReflectionUtil.CreateObject(Type type, Object[] parameters)
at Sitecore.Data.Fields.FieldType.GetField(Field field)
at Sitecore.Data.Fields.FieldTypeManager.GetField(Field field, String runtimeValue)
at Sitecore.Links.ItemLinks.AddLinks(Field field, List1 links, ItemLinkState linkState) at Sitecore.Links.ItemLinks.GetLinks(ItemLinkState linkState, Boolean allVersions, Boolean includeStandardValuesLinks) at Sitecore.Links.LinkDatabase.UpdateItemVersionReferences(Item item) at Sitecore.Events.Event.EventSubscribers.RaiseEvent(String eventName, Object[] parameters, EventResult result) at Sitecore.Events.Event.RaiseEvent(String eventName, Object[] parameters) at Sitecore.Events.Event.RaiseItemSaved(Object sender, ItemSavedEventArgs args) at System.EventHandler1.Invoke(Object sender, TEventArgs e)
at Sitecore.Data.Engines.EngineCommand2.RaiseEvent[TArgs](EventHandler1 handlers, Func2 argsCreator) at Sitecore.Data.Engines.EngineCommand2.Execute()
at Sitecore.Data.Engines.DataEngine.SaveItem(Item item)
at Sitecore.Data.Managers.ItemProvider.SaveItem(Item item)
at Sitecore.Data.Items.ItemEditing.AcceptChanges(Boolean updateStatistics, Boolean silent)
at Sitecore.Data.Items.EditContext.Dispose()
at Sitecore.Publishing.PublishHelper.CopyToTarget(Item sourceVersion)
at Sitecore.Publishing.PublishHelper.PublishVersionToTarget(Item sourceVersion, Item targetItem, Boolean targetCreated)
at Sitecore.Publishing.Pipelines.PublishItem.PerformAction.ExecuteAction(PublishItemContext context)
at Sitecore.Publishing.Pipelines.PublishItem.PerformAction.Process(PublishItemContext context)
at (Object , Object[] )
at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
at Sitecore.Publishing.Pipelines.PublishItem.PublishItemPipeline.Run(PublishItemContext context)
at Sitecore.Publishing.Pipelines.Publish.ProcessQueue.ProcessEntries(IEnumerable`1 entries, PublishContext context)
at Sitecore.Publishing.Pipelines.Publish.ProcessQueue.Process(PublishContext context)
at (Object , Object[] )
at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
at Sitecore.Publishing.Pipelines.Publish.PublishPipeline.Run(PublishContext context)
at Sitecore.Publishing.Publisher.PublishWithResult()
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)
at (Object , Object[] )
at Sitecore.Pipelines.CorePipeline.Run(PipelineArgs args)
at Sitecore.Jobs.Job.ThreadEntry(Object state)

[dhruska]

@rangler2 @jcore @kjetilb Were you ever able to reach a resolution for this issue? I'm having the exact same issue on another project and creating the alternate constructor results in numerous NullReferenceExceptions as it did for you.

[mihaela-radu]

Hello,

I work in @rangler2's development team, we still have no solution for this.
This warning is flooding the logs for one of our production websites, did anyone find a fix for it (without causing bigger issues)?

Thanks
M.

[mklimmasch]

Hi @mihaela-radu ,

I could not reproduce this in Sitecore 8.1, but could you maybe try to add the field to the fieldTypes configuration and see if that fixes the Exceptions?

Greetz,
Markus

[marcelgruber]

Try this patch

<?xml version="1.0" encoding="utf-8" ?>
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
	<sitecore>
		<fieldTypes>
			<!-- Register field so that image references will appear in the link database. -->
			<fieldType name="Advance Image" type="SitecoreFramework.Fields.Fields.AdvanceImageField,SitecoreFramework.Fields" />
		</fieldTypes>
	</sitecore>
</configuration>