[#LOG4NET-35] Exception rendering ThreadContextStack if null value pushed into stack

Log4net

Exception rendering ThreadContextStack if null value pushed into stack

Created: 21/Jun/05 04:10 AM Updated: 21/Jun/05 04:14 AM

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Component/s:

Core

Affects Version/s:

1.2.9

Fix Version/s:

1.2.10

Time Tracking:

Not Specified

Resolution Date:

21/Jun/05 04:14 AM

Description

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If a null value is pushed into a ThreadContext stack then an internal log4net error is generated when the ThreadContextStack is rendered.
The following error and stack trace are output into the log:

<log4net.Error>Exception rendering object type [log4net.Util.ThreadContextStack]<stackTrace>System.NullReferenceException: Object reference not set to an instance of an object.
   at log4net.Util.StackFrame.get_FullMessage()
   at log4net.Util.ThreadContextStack.GetFullMessage()
   at log4net.Util.ThreadContextStack.ToString()
   at log4net.ObjectRenderer.DefaultRenderer.RenderObject(RendererMap rendererMap, Object obj, TextWriter writer)
   at log4net.ObjectRenderer.RendererMap.FindAndRender(Object obj, TextWriter writer)</stackTrace></log4net.Error>

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Nicko Cadell added a comment - 21/Jun/05 04:14 AM

Fixed by adding additional check for null parent in ThreadContextStack. Added tests to reproduce issue, and verify fix.