OutOfMemoryException...Unable to serialize the session..?

[Guest]

We just started getting this error message in our application today (stack
trace below). From the OutOfMemoryException, I'm guessing it could be a
memory leak. I'm making sure I'm closing all my connections in the finally
block but I'm not sure what I should be doing.

As far as the "Unable to serialize the session state" error, this app has
been running for days and this is the first I've seen this one as well.

Any thoughts would be greatly appreciated...

[OutOfMemoryException: Exception of type System.OutOfMemoryException was
thrown.]

[HttpException (0x80004005): Unable to serialize the session state. Please
note that non-serializable objects or MarshalByRef objects are not permitted
when session state mode is 'StateServer' or 'SQLServer'.]
System.Web.Util.AltSerialization.WriteValueToStream(Object value,
BinaryWriter writer) +1710
System.Web.SessionState.SessionDictionary.Serialize(BinaryWriter writer)
+148
System.Web.SessionState.StateClientManager.Serialize(SessionStateItem
item, Stream stream) +146

System.Web.SessionState.SqlStateClientManager.System.Web.SessionState.IStateClientManager.Set(String id, SessionStateItem item, Boolean inStorage) +126
System.Web.SessionState.SessionStateModule.OnReleaseState(Object source,
EventArgs eventArgs) +465

System.Web.SyncEventExecutionStep.System.Web.HttpApplication+IExecutionStep.Execute() +60
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously) +87

 

[Bruce Barker]

the outofmemory error is misleading. the real problem is trying to store an
object in a sqlserver session manager that cannot be serialized. not all
..net object can be serialized, check that what you store in session can.

-- bruce (sqlwork.com)

 

[rich leung]

Hello,
I use an ASP.Net app on WIndows 2000 with SQL Server 2000 to store
persistant sessions.
I have the same problem but it does not always happen. I can be doing a
particular task one day without errors but on another day I will get the
error (Doing the exact same thing).
The only thing I've noticed is the Total Server Memory under Performance
Monitor rises and rises over a span of a couple of days. Once it exceeds 40
out of 100 it is likely I will come across this problem.

Please can anyone help?
Rich.