System.NullReferenceException at
FirebirdSql.Data.FirebirdClient.FbConnectionPool.get_Count()
---------------------------------------------------------------------------------------------
Key: DNET-366
URL: http://tracker.firebirdsql.org/browse/DNET-366
Project: .NET Data provider
Issue Type: Bug
Components: ADO.NET Provider
Affects Versions: 2.6
Environment: .NET 3.5 with the 2.6.0 provider
Reporter: Fernando Nájera
Assignee: Jiri Cincura
Priority: Critical
I just got the following exception while my application was running:
System.NullReferenceException: Object reference not set to an instance of an
object.
at FirebirdSql.Data.FirebirdClient.FbConnectionPool.get_Count() in
C:\Users\Jiri\Desktop\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbConnectionPool.cs:line
82
at FirebirdSql.Data.FirebirdClient.FbConnectionPool.CleanupWorker(Object
state) in
C:\Users\Jiri\Desktop\NETProvider\source\FirebirdSql\Data\FirebirdClient\FbConnectionPool.cs:line
303
at System.Threading._TimerCallback.TimerCallback_Context(Object state)
at System.Threading.ExecutionContext.runTryCode(Object userData)
at
System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode
code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal(ExecutionContext
executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext,
ContextCallback callback, Object state)
at System.Threading._TimerCallback.PerformTimerCallback(Object state)
Unfortunately I cannot replicate it -- which is probably because this might be
a timing issue (I can see threads in the stacktrace... so probably I hit a race
condition).
Having a look at the source code of FbConnectionPool, I guess the problem might
be that one thread is disposing the object while another one is asking for
.Count. I can see that .Count is calling "lock (this.unlocked.SyncRoot)", but
during the disposal that variable might be already null...
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://tracker.firebirdsql.org/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
------------------------------------------------------------------------------
The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE:
Pinpoint memory and threading errors before they happen.
Find and fix more than 250 security defects in the development cycle.
Locate bottlenecks in serial and parallel code that limit performance.
http://p.sf.net/sfu/intel-dev2devfeb
_______________________________________________
Firebird-net-provider mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/firebird-net-provider
