IT27681: DATA PROTECTION FOR HYPER-V CRASH WHEN HYPER-V GUEST MIGRATES BETWEEN HYPER-V HOSTS DURING BACKUP

APAR status

• Closed as program error.

Error description

• When running a VM backup of Hyper-V guests, and one of the
  Hyper-V guests migrates to another Hyper-V host during backup,
  the IBM Spectrum Protect client might crash.
  
  Customer/L2 Diagnostics:
  Extract the stack from dsmcrash.dmp. The stack will look like:
  
  dsmc!DoMultiVMSnap+0x18a2
  dsmc!vmHypervDispatchCallback+0x1434
  dsmc!DccBackupController::bacDispatcher+0x86
  dsmc!DccBaPerformanceMonitor::Monitor+0x193
  dsmc!startThread+0x81
  ucrtbase!o__realloc_base+0x60
  kernel32!BaseThreadInitThunk+0x22
  ntdll!RtlUserThreadStart+0x34
  
  IBM Spectrum Protect Versions Affected:
  IBM Spectrum Protect for Virtual Environments - Data Protection
  for Microsoft Hyper-V 7.1.8
  IBM Spectrum Protect for Virtual Environments - Data Protection
  for Microsoft Hyper-V 8.1.x
  The issue is only seen on Microsoft Windows 2012R2 Hyper-V hosts
  
  Initial Impact: Medium
  
  Additional Keywords: TDP, TDP4VE, Hyperv, MS, TS001566148
  

Local fix

• Apply one of the following workarounds:
  - Migrate the Hyper-V hosts to Microsoft Windows Server 2016
  - avoid VM migrations while backups are running.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Spectrum Protect for Virtual Environments Data Protection    *
  * for Microsoft Hyper-V versions 7.1.6, 7.1.8, 8.1.2, 8.1.4,   *
  * 8.1.6 and 8.1.7 on  Windows Server 2012 (R2)                 *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * This issue is projected to be fixed in the Data Protection   *
  * for Microsoft Hyper-V version 8.1.8 on all Microsoft Windows *
  * platforms                                                    *
  * Note that this is subject to change at the discretion of     *
  * IBM.                                                         *
  ****************************************************************
  

Problem conclusion

• The  Data Protection for Microsoft Hyper-V has been changed to
  issue a message and continue processing other virtual machines
  when one of the vm has moved to another HyperV host.
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• DSM      DSMC
  

Fix information

• Fixed component name

  TSM VE DP MS HY

• Fixed component ID

  5725TVEHV

Applicable component levels