Hello Mohamed,

Please direct your question to the ActiveMQ users list. This list is for 
developers working on making changes to ActiveMQ.

Correct list for your question:
us...@activemq.apache.org <mailto:us...@activemq.apache.org>

Thanks,
Matt

> On Jun 4, 2025, at 2:44 AM, mohamed dridi <mohamed_drid...@yahoo.fr.INVALID> 
> wrote:
> 
> Hello , I hope you are doing well  
> Could you please assist me with the issue below ? 
> 
> I am investigating an issue that a client of ours reported but I didn't 
> manage to figure out the root cause by myself. The application crashes and 
> the event log shows NullReferenceException in the method 
> ClearMessagesInProgress() of the file MessageConsumer.cs of 
> activemq-nms-stomp. 
> 
> Below is what is seen in the event log :pplication: FBSService.exe
> Framework Version: v4.0.30319
> Description: The process was terminated due to an unhandled exception.
> Exception Info: System.NullReferenceException
>    at Apache.NMS.Stomp.MessageConsumer.ClearMessagesInProgress()
>        at 
> System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext,
>                 System.Threading.ContextCallback, System.Object, Boolean)
>    at 
> System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext,      
> System.Threading.ContextCallback, System.Object, Boolean)
>    at   
> System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem(
>    )
>    at System.Threading.ThreadPoolWorkQueue.Dispatch()Faulting application 
> name: FBSService.exe, version: 1.7.4.4, time stamp: 0x623caac4
> Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
> Exception code: 0xc0000005
> Fault offset: 0x00007ffa18f5ae81
> Faulting process id: 0x3a0
> Faulting application start time: 0x01dbcfa84ee57e9c
> Faulting application path: D:\App\FBS Service\FBSService.exe
> Faulting module path: unknown
> Report Id: 51cacd1e-0537-4a5f-b148-9390bdf69f04
> Faulting package full name:
> Faulting package-relative application ID:The application produces an activemq 
> log .If needed , I will send it to you
> 
> I hope you guys are able to help me. Thank you very much in advance
> Regards,
> 
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> Mohamed Dridi
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> Junior software developer
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> mohamed_drid...@yahoo.fr
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> 52 867 533
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> 14 rue Ahmed chawki , Hammam chott
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