Hello colleagues,
At this moment we have a real big problem using a .NET application with an
Oracle database (v8.1.6).
I hope someone has encountered this problem before and is able to help me
with it.
The problem is that we *Sometimes* get the ORA-24338 error when executing a
query.
This problem occurs random, sometimes twice a day, sometimes not at all. In
the eventlog we
get an exception like this one (stacktrace):
Additonal Info:
ExceptionManage r.MachineName: TEST-DIG
ExceptionManage r.TimeStamp: 23-2-2004 16:38:25
ExceptionManage r.FullName: Microsoft.Appli cationBlocks.Ex ceptionManageme nt,
Version=1.0.137 6.20570, Culture=neutral , PublicKeyToken= 9f1cd949e9897e4 a
ExceptionManage r.AppDomainName :
/LM/W3SVC/1818675049/Root-1-127219909862343 750
ExceptionManage r.ThreadIdentit y:
ExceptionManage r.WindowsIdenti ty: NT AUTHORITY\NETWO RK SERVICE
Exception Information
System.Web.Http UnhandledExcept ion: Exception of type
System.Web.Http UnhandledExcept ion was thrown.
---AnalyzeIT.Web.P ortalFramework. Common.PortalDa taException: PF DB: Het
opvragen van de databaseversie is mislukt. --->
System.Data.Ora cleClient.Oracl eException: ORA-24338: Statement handle not
executed
at System.Data.Ora cleClient.Oracl eException.Chec k(OciHandle errorHandle,
Int32 rc)
at System.Data.Ora cleClient.OciHa ndle.GetAttribu te(ATTR attribute, Int32&
value, OciHandle errorHandle)
at System.Data.Ora cleClient.Oracl eDataReader.Fil lColumnInfo()
at System.Data.Ora cleClient.Oracl eDataReader..ct or(OracleConnec tion
connection, OciHandle statementHandle )
at
System.Data.Ora cleClient.Oracl eParameterBindi ng.GetOutputVal ue(NativeBuffer
parameterBuffer , OracleConnectio n connection, Boolean needCLSType)
at
System.Data.Ora cleClient.Oracl eParameterBindi ng.PostExecute( NativeBuffer
parameterBuffer , OracleConnectio n connection)
at System.Data.Ora cleClient.Oracl eCommand.Execut e(OciHandle
statementHandle , CommandBehavior behavior, Boolean isReader, Boolean
needRowid, OciHandle& rowidDescriptor , ArrayList&
refCursorParame terOrdinals)
at System.Data.Ora cleClient.Oracl eCommand.Execut e(OciHandle
statementHandle , CommandBehavior behavior, ArrayList&
refCursorParame terOrdinals)
at System.Data.Ora cleClient.Oracl eCommand.Execut eReader(Command Behavior
behavior)
at System.Data.Ora cleClient.Oracl eCommand.Execut eReader()
at
System.Data.Ora cleClient.Oracl eCommand.System .Data.IDbComman d.ExecuteReader (
)
at AnalyzeIT.Web.P ortalFramework. Data.SysteemDB. GetDatabaseVers ie()
--- End of inner exception stack trace ---
at AnalyzeIT.Web.P ortalFramework. Data.SysteemDB. GetDatabaseVers ie()
at
AnalyzeIT.Web.P ortalFramework. Common.DefaultP age.CheckDataba seCompatibilite i
t()
at AnalyzeIT.Web.P ortalFramework. Common.DefaultP age.Page_Load(O bject
sender, EventArgs e)
at System.EventHan dler.Invoke(Obj ect sender, EventArgs e)
at System.Web.UI.C ontrol.OnLoad(E ventArgs e)
at System.Web.UI.C ontrol.LoadRecu rsive()
at System.Web.UI.P age.ProcessRequ estMain()
--- End of inner exception stack trace ---
at System.Web.UI.P age.HandleError (Exception e)
at System.Web.UI.P age.ProcessRequ estMain()
at System.Web.UI.P age.ProcessRequ est()
at System.Web.UI.P age.ProcessRequ est(HttpContext context)
at
System.Web.Call HandlerExecutio nStep.System.We b.HttpApplicati on+IExecutionSt e
p.Execute()
at System.Web.Http Application.Exe cuteStep(IExecu tionStep step, Boolean&
completedSynchr onously)
The only statement executed by our code is calling
SysteemDB.GetDa tabaseVersie (in the namespace
AnalyzeIT.Web.P ortalFramework. Data)
The code for it is:
CREATE OR REPLACE PACKAGE PkgSystem AS
TYPE CRSR IS REF CURSOR;
PROCEDURE GetDatabaseVers ie(ERROR OUT NUMBER,CUR OUT CRSR);
END PkgSystem;
/
CREATE OR REPLACE PACKAGE BODY PkgSystem AS
PROCEDURE GetDatabaseVers ie(ERROR OUT NUMBER,CUR OUT CRSR) IS
BEGIN
ERROR := 0;
OPEN CUR FOR
SELECT SI_Waarde as DatabaseVersie
FROM Systeeminformat ie
WHERE SI_NAAM='DATABA SEVERSIE';
EXCEPTION
WHEN OTHERS THEN
ERROR := SQLCODE;
END GetDatabaseVers ie;
END PkgSystem;
/
This will execute a stored procedure in the package PGKSystem which has the
following implementation:
public string GetDatabaseVers ie()
{
cm = DatabaseFactory .CreateCommand( );
cm.CommandType = CommandType.Sto redProcedure;
cm.Connection = this.InternalCo nnection;
cm.CommandText = "PkgPortaalBehe er.GetDatabaseV ersie";
OracleParameter pa = new OracleParameter ();
pa.OracleType = OracleType.Curs or;
pa.ParameterNam e = "CUR";
pa.Direction = ParameterDirect ion.Output;
cm.Parameters.A dd(pa);
IDbDataParamete r param = new OracleParameter ();
param.Parameter Name = "ERROR";
param.DbType = DbType.Decimal;
param.Direction = ParameterDirect ion.Output;
cm.Parameters.A dd(param);
string DatabaseVersion = "";
try
{
this.Connection .Open();
IDataReader dr = cm.ExecuteReade r();
// Get the database version
while(dr.Read() )
{
try
{
DatabaseVersion = dr["DatabaseVersio n"] as string;
}
catch(Exception exc)
{
throw new PortalDataExcep tion("PF DB: Failed to get DB version",exc);
}
}
}
catch(Exception exc)
{
throw new PortalDataExcep tion("PF DB: Failed to get DB version",exc);
}
finally
{
this.Connection .Close();
}
return DatabaseVersion ;
}
This code was a little modified to make it more clear, but the statements
are intact.
To my best knowledge, this is how things work. Also, this code executes fine
in 99% of the time
However, if something goes wrong and the ORA-24388 error occurs, Oracle
cannot be reached by
the website for about 5 minutes after the last ORA-24388 error.
So: if the error occurs, and we try again 4 minutes later, then it seems to
reset the counter and will
from then on be unavailble for 5 minutes. So it will be unavailable for 9
minutes in total. (and so on)
I have no clue why it's 5 minutes and why the database is unavailble for
other commands as well in that time.
I really hope someone is willing to help me out here, I've been struggling
with this problem
for about 2 months now and we were not able to resolve this until now!
Any advice is highly appreciated!
J. Bijleveld
The Netherlands