[AMQNET-339] NullReferenceException from Apache.NMS.ActiveMQ.Transport.InactivityMonitor

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.5.1
• Fix Version/s: 1.5.2, 1.6.0
• Component/s: NMS

Environment

Windows Server 2008 R2
.NET 4

• Assignee: Jim Gomes
• Reporter: Stein J. Gran
• Created: 15/Aug/11 12:31
• Updated: 04/Aug/12 09:01
• Resolved: 29/Sep/11 18:33

Description

Using NMS in a Windows service, which crashes with the following entry in the Event Log:

Log Name: Application
Source: .NET Runtime
Date: 04.08.2011 02:30:00
Event ID: 1026
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: dev-162.hq.infofinder.no
Description:
Application: IFExchangeFetch.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NullReferenceException
Stack:
at Apache.NMS.ActiveMQ.Transport.InactivityMonitor.WriteCheck()
at Apache.NMS.ActiveMQ.Transport.InactivityMonitor.CheckConnection(System.Object)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading._TimerCallback.PerformTimerCallback(System.Object)

Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name=".NET Runtime" />
<EventID Qualifiers="0">1026</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2011-08-04T00:30:00.000000000Z" />
<EventRecordID>1047</EventRecordID>
<Channel>Application</Channel>
<Computer>dev-162.hq.infofinder.no</Computer>
<Security />
</System>
<EventData>
<Data>Application: IFExchangeFetch.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.NullReferenceException
Stack:
at Apache.NMS.ActiveMQ.Transport.InactivityMonitor.WriteCheck()
at Apache.NMS.ActiveMQ.Transport.InactivityMonitor.CheckConnection(System.Object)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading._TimerCallback.PerformTimerCallback(System.Object)
</Data>
</EventData>
</Event>

The unfortunate thing here is that the entire service crashes due to this error.