Trouble with iis express. Keeps stopping every few minutes

[pryan67]

So starting Saturday morning, Lansweeper stopped working.    In troubleshooting we saw that the service iis express keeps stopping.  After restarting it, it will run for a few minutes and we can access the console, but then it stops after a couple of minutes.  

We're running 10.3.2.0, but I upgraded LS to 11.4 to see if that did any good.   Unfortunately that didn't work either.   

In event viewer we see errors relating to iis express (which LS uses version 6 I believe which is EOL.  We'd like to update that, but I can't find information on how to do that within LS) and ASP.NET (lucene.net.index.mergepolict+MergeException).

I tried to open a service ticket with Lansweeper, but that page appears to be having issues.   

Does anyone have any thoughts?

I'd really rather avoid having to build a new server and move LS to that....that seems like a LOT of work.

[pryan67]

here are some of the errors we see in event viewer:

An unhandled exception occurred and the process was terminated.

Application ID: /LM/W3SVC/1/ROOT

Process ID: 13236

Exception: Lucene.Net.Index.MergePolicy+MergeException

Message: Exception of type 'Lucene.Net.Index.MergePolicy+MergeException' was thrown.

StackTrace: at Lucene.Net.Index.ConcurrentMergeScheduler.HandleMergeException(Exception exc)
at Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.Run()
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()

InnerException: System.IndexOutOfRangeException

Message: Index was outside the bounds of the array.

StackTrace: at Lucene.Net.Index.IndexWriter.HandleMergeException(Exception t, OneMerge merge)
at Lucene.Net.Index.IndexWriter.Merge(OneMerge merge)
at Lucene.Net.Index.ConcurrentMergeScheduler.MergeThread.Run()

Followed by:

Application: iisexpress.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IndexOutOfRangeException
at Lucene.Net.Index.IndexWriter.HandleMergeException(System.Exception, OneMerge)
at Lucene.Net.Index.IndexWriter.Merge(OneMerge)
at Lucene.Net.Index.ConcurrentMergeScheduler+MergeThread.Run()

Exception Info: Lucene.Net.Index.MergePolicy+MergeException
at Lucene.Net.Index.ConcurrentMergeScheduler.HandleMergeException(System.Exception)
at Lucene.Net.Index.ConcurrentMergeScheduler+MergeThread.Run()
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.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ThreadHelper.ThreadStart()

And then:
Faulting application name: iisexpress.exe, version: 8.5.9771.0, time stamp: 0x53a3164f
Faulting module name: KERNELBASE.dll, version: 10.0.14393.7254, time stamp: 0x66ac6f3c
Exception code: 0xe0434352
Fault offset: 0x0000000000026ea8
Faulting process id: 0x33b4
Faulting application start time: 0x01db1274ba8279e4
Faulting application path: C:\Program Files\IIS Express\iisexpress.exe
Faulting module path: C:\windows\System32\KERNELBASE.dll
Report Id: 603dea10-e459-4f16-a0c4-765fe7e1b96d
Faulting package full name:
Faulting package-relative application ID:



 and finally:

The IIS Express service service terminated unexpectedly.