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From "Marc Gabriel-Willem" <marc.gabriel-wil...@side-international.com>
Subject Cayenne -- Apache re-deploy problem -- NullPointerException
Date Tue, 13 Mar 2007 10:20:42 GMT
Hi,

 

I'm using Cayenne (2.0.2) with the apache web server (5.5.20) and I'm
facing to the following problem.

 

When apache does an automatic deploy, all objects are serialized /
deserialized without any error. 

But after that, when the code accesses a cayenne persistent object
(member variable of a jsf backing bean), the following problem occurs:

 

Caused by: java.lang.NullPointerException

        at
org.apache.cayenne.access.DataContextQueryAction.interceptPaginatedQuery
(DataContextQueryAction.java:91)

        at
org.apache.cayenne.access.DataContextQueryAction.execute(DataContextQuer
yAction.java:50)

        at
org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1387)

        at
org.apache.cayenne.access.DataContext.performQuery(DataContext.java:1376
)

        at
org.apache.cayenne.access.ToManyList.resolvedObjectList(ToManyList.java:
307)

        at
org.apache.cayenne.access.ToManyList.size(ToManyList.java:260)

        at
com.sideinternational.web.profiling.group.GroupEditor.save(GroupEditor.j
ava:246)

        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav
a:39)

        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor
Impl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:585)

        at
org.apache.myfaces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:13
2)

 

For information, the following code throws that exception (the call to
the size() method) :

List itemsToRemove = m_editableGroup.getGroupContentArray();

      for (int i=0; i < itemsToRemove.size(); i++)

            ...

Note: Child data context and ObjectEntities are stored in a serializable
jsf backing bean.

 

Thank you for your help.

 

Marc Gabriel

 

 

 


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