Hi All,
I am posting here an issue that i observed with NHibernate. Sorry to
post here if this is already (if so please redirect me to the same).
Details of my project:
NHibernate version used - 1.2
Underlying database - Oracle 11g.
.NET language - C#, .NET Framework - 3.5
Issue:
Code:
Attempted to read or write protected memory. This is often an
indication that other memory is corrupt.
The inner exception is:
An exception of type 'NHibernate.ADOException' occurred in method
'DoList' of class 'Loader'
The stack trace given is:
at NHibernate.Loader.Loader.DoList(ISessionImplementor session,
QueryParameters queryParameters) in C:\Documents and Settings\test
\Desktop\NHibernate-1.2.1.GA-src\src\NHibernate\Loader\Loader.cs:line
1803
at
NHibernate.Loader.Loader.ListIgnoreQueryCache(ISessionImplementor
session, QueryParameters queryParameters) in C:\Documents and Settings
\test\Desktop\NHibernate-1.2.1.GA-src\src\NHibernate\Loader
\Loader.cs:line 1745
at NHibernate.Loader.Loader.List(ISessionImplementor session,
QueryParameters queryParameters, ISet querySpaces, IType[]
resultTypes) in C:\Documents and Settings\test\Desktop
\NHibernate-1.2.1.GA-src\src\NHibernate\Loader\Loader.cs:line 1733
at NHibernate.Impl.SessionImpl.Find(CriteriaImpl criteria, IList
results) in C:\Documents and Settings\test\Desktop\NHibernate-1.2.1.GA-
src\src\NHibernate\Impl\SessionImpl.cs:line 4963
at NHibernate.Impl.SessionImpl.Find[T](CriteriaImpl criteria) in C:
\Documents and Settings\test\Desktop\NHibernate-1.2.1.GA-src\src
\NHibernate\Impl\SessionImpl.cs:line 4914
at NHibernate.Impl.CriteriaImpl.List[T]() in C:\Documents and
Settings\test\Desktop\NHibernate-1.2.1.GA-src\src\NHibernate\Impl
\CriteriaImpl.cs:line 323
The inner exception is:
An exception of type 'System.AccessViolationException' occurred in
method 'Read' of class 'OpsDac'
The stack trace given is:
at Oracle.DataAccess.Client.OpsDac.Read(IntPtr opsConCtx, IntPtr
opsErrCtx, IntPtr opsSqlCtx, IntPtr& opsDacCtx, OpoSqlValCtx*
pOpoSqlValCtx, OpoMetValCtx* pOpoMetValCtx, OpoDacValCtx*
pOpoDacValCtx)
at Oracle.DataAccess.Client.OracleDataReader.Read()
at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session,
QueryParameters queryParameters, Boolean returnProxies) in C:
\Documents and Settings\test\Desktop\NHibernate-1.2.1.GA-src\src
\NHibernate\Loader\Loader.cs:line 440
at
NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor
session, QueryParameters queryParameters, Boolean returnProxies) in C:
\Documents and Settings\test\Desktop\NHibernate-1.2.1.GA-src\src
\NHibernate\Loader\Loader.cs:line 181
at NHibernate.Loader.Loader.DoList(ISessionImplementor session,
QueryParameters queryParameters) in C:\Documents and Settings\test
\Desktop\NHibernate-1.2.1.GA-src\src\NHibernate\Loader\Loader.cs:line
1793
Code Accessing NHibernate:
I save an object say 'OBJ1' in database using ADO.NET, and then i try
to load it from NHibernate, but at this time i get the above reported
exception.
Below is the sample code.
Code:
public void Main()
{
//Placeholder for saving ID of new record that is saved through
ADO.
decimal static ADOSavedObjectID;
ADONewTestRecord obj = new ADONewTestRecord();
//ADO.NET code to save this returns saved object db ID.
ADOSavedObjectID = SaveThroughADO(obj);
//Fetch the Saved record through NHibernate.
TestNewRecordFromNHibernate =
GetTestRecordThroughNHibernate(ADOSavedObjectID)
public decimal SaveThroughADO(ADONewTestRecord obj)
{
//ADO code.
}
public TestNewRecordFromNHibernate
GetTestRecordThroughNHibernate(decimal ADOSavedObjectID)
{
return LoadNHibernateObject(ADOSavedObjectID);
}
public TestNewRecordFromNHibernate LoadNHibernateObject(decimal
ADOSavedObjectID)
{
//NHibernate session is already opened, i am not providing
details.
Session.Clear();
IList<TestNewRecordFromNHibernate> results;
ICriteria criteria = Session.CreateCriteria(typeof
(TestNewRecordFromNHibernate));
criteria.Add(Expression.Eq("ID", ADOSavedObjectID));
//In this line i get the reported exception see above.
results = criteria.List<TestNewRecordFromNHibernate>();
return results[0];
}
}
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