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Re: NullPointerException in EODatabaseContext java
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Re: NullPointerException in EODatabaseContext java

  • Subject: Re: NullPointerException in EODatabaseContext java
  • From: "Cheong Hee (Gmail)" <email@hidden>
  • Date: Fri, 01 Jun 2012 14:11:53 +0800
i guessed one quick way is to invalidate the objects in ec and force it to refetch from db.
----- Original Message ----- From: "Raghavender Bokka" <email@hidden> 
To: "Development WebObjects" <email@hidden>
Sent: Thursday, May 31, 2012 9:04 PM
Subject: NullPointerException in EODatabaseContext java



Hi Team,
I have created an enterprise object with one-to-many relationship objects associating. Then in the search page searched for these enterprise objects (that has WODisplayGroup), I am able to view the newly created object, but when I try to select that object to view the details it is generating the following exception. If I restart the application then I am able to view the details of the newly created object without any error, or If we try accessing the newly created object after sometime (around half an hour later) then without error able to view the object details. Otherwise the enterprise object is getting null.
This enterprise object's super class has the database table, and this object does not has the database table, it points to the same database table of the super class. And the to-many relationship is existing with this enterprise object (sub-class), not the super class. 

Any help would be appreciated.

------------------------EXCEPTION--------------------------------------------------
[2012-5-31 8:25:4 EDT] <WorkerThread7> java.lang.NullPointerException
at com.webobjects.eoaccess.EODatabaseContext.arrayFaultWithSourceGlobalID(EODatabaseContext.java:3510) at com.webobjects.eoaccess.EODatabaseContext._fireDeferredFaultWithSourceObject(EODatabaseContext.java:2377) at com.webobjects.eoaccess.EOAccessDeferredFaultHandler.createFaultForDeferredFault(EOAccessDeferredFaultHandler.java:49) at com.webobjects.eocontrol.EOCustomObject.willReadRelationship(EOCustomObject.java:1279) at com.webobjects.eocontrol._EOMutableKnownKeyDictionary$Initializer$_LazyGenericRecordBinding.valueInObject(_EOMutableKnownKeyDictionary.java:614) at com.webobjects.eocontrol.EOCustomObject.storedValueForKey(EOCustomObject.java:1634) 
       at _StoredDistrictTest.storedTestItems(_StoredDistrictTest.java:33)
       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 KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60) at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134) at com.webobjects.eocontrol.EOCustomObject.valueForKey(EOCustomObject.java:1498) at com.webobjects.eocontrol.EOCustomObject.eoDescription(EOCustomObject.java:793) at com.webobjects.eocontrol.EOCustomObject.toString(EOCustomObject.java:299) 
       at java.lang.String.valueOf(String.java:2826)
       at java.lang.StringBuilder.append(StringBuilder.java:115)
       at StoredTestListPage.printTestSession(StoredTestListPage.java:276)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
       at java.lang.reflect.Method.invoke(Method.java:597)
at KeyValueCodingProtectedAccessor.methodValue(KeyValueCodingProtectedAccessor.java:60) at com.webobjects.foundation.NSKeyValueCoding$_MethodBinding.valueInObject(NSKeyValueCoding.java:1134) at com.webobjects.foundation.NSKeyValueCoding$DefaultImplementation.valueForKey(NSKeyValueCoding.java:1324) at com.webobjects.appserver.WOComponent.valueForKey(WOComponent.java:1736) at com.webobjects.foundation.NSKeyValueCoding$Utility.valueForKey(NSKeyValueCoding.java:447) at com.webobjects.foundation.NSKeyValueCodingAdditions$DefaultImplementation.valueForKeyPath(NSKeyValueCodingAdditions.java:212) at com.webobjects.appserver.WOComponent.valueForKeyPath(WOComponent.java:1804) at com.webobjects.appserver._private.WOKeyValueAssociation.valueInComponent(WOKeyValueAssociation.java:50) at com.webobjects.appserver._private.WOHyperlink.invokeAction(WOHyperlink.java:98) at er.extensions.components._private.ERXHyperlink.invokeAction(ERXHyperlink.java:66) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at er.extensions.components._private.ERXWORepetition.invokeAction(ERXWORepetition.java:496) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at er.extensions.components._private.ERXWOForm.invokeAction(ERXWOForm.java:219) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver._private.WOComponentContent.invokeAction(WOComponentContent.java:38) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver._private.WOConditional.invokeAction(WOConditional.java:86) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver._private.WOHTMLURLValuedElement.invokeAction(WOHTMLURLValuedElement.java:149) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079) at er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:102) at com.webobjects.appserver._private.WOComponentReference.invokeAction(WOComponentReference.java:127) at com.webobjects.appserver._private.WODynamicGroup.invokeChildrenAction(WODynamicGroup.java:105) at com.webobjects.appserver._private.WODynamicGroup.invokeAction(WODynamicGroup.java:115) at com.webobjects.appserver.WOComponent.invokeAction(WOComponent.java:1079) at er.extensions.components.ERXComponent.invokeAction(ERXComponent.java:102) at com.webobjects.appserver.WOSession.invokeAction(WOSession.java:1357) 
       at Session.invokeAction(Session.java:179)
at com.webobjects.appserver.WOApplication.invokeAction(WOApplication.java:1745) at er.extensions.appserver.ajax.ERXAjaxApplication.invokeAction(ERXAjaxApplication.java:93) at er.extensions.appserver.ERXApplication.invokeAction(ERXApplication.java:1869) at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedPage(WOComponentRequestHandler.java:206) at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:298) at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332) at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369) at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442) at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687) at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1984) at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1949) 
       at Application.dispatchRequest(Application.java:742)
at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144) at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226) 
       at java.lang.Thread.run(Thread.java:619)
-------------------- 
Regards,
Raghu.



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