[RHEV] RHEV-M upgrade installer crashes with .NET 4 installed

Solution Verified - Updated -

Environment

  • Windows Server 2008 R2 (64-bit)
  • .NET 4 runtime
  • RHEV-M installer builds 51796 and 52920

Issue

  • "I was trying to install and the installer crashed, when I restarted the installer, I chose to repair[1] hoping it would finish the installation. It proceeded to remove RHEV-M."
  • With .NET 4 installed on Windows 2008 R2, the upgrade of RHEV-M from 2.2.2 (build 47069) to 2.2.4 (build 51796) crashed on a .NET .dll file with this error message:
    Description:
  Stopped working

Problem signature:
  Problem Event Name:     APPCRASH
  Application Name:     RHEVM_51796.exe
  Application Version:     4.5.4.51796
  Application Timestamp:     4a30034b
  Fault Module Name:     mscorwks.dll
  Fault Module Version:     2.0.50727.4952
  Fault Module Timestamp:     4bebd49a
  Exception Code:     c0000005
  Exception Offset:     0004eb4a
  OS Version:     6.1.7600.2.0.0.272.7
  Locale ID:     1033

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  • The crash appears in Windows like the following screenshot:

Resolution

** Please note: If the installer crashes during an upgrade of RHEV-M, please contact a Red Hat Support Technician immediately!  In many cases, the fix will be to uninstall and reinstall RHEV-M by following Scenario III, Step 7 in this kbase article: RHEV: How to restore RHEV-M after a crash

If you have found this kbase article prior to upgrading RHEV-M and you have .NET 4 installed, please do the following:

  1. Remove .NET 4 (RHEV: How do I remove .Net4 from my RHEV-M 2.2 machine?)

  2. Reboot Windows

  3. Install .NET 3.5.1 (refer Admin Guide)

Root Cause

RHEV-M officially supports .NET 3.5.1 only and was never tested to work with higher versions.  Future RHEV-M installers, starting with 2.2.9, will check for the presence of .NET 4 and will instruct the user accordingly.

[1] Please do not use Repair or Modify options on RHEV-M installer as per RHEV-M: What do "Modify" or "Repair" options do on RHEV-M Installer?.

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