IT30711: HYPER-V VIRTUAL MACHINE BACKUP FAILS WITH "FAILED TO CREATE HYPERVISOR CLUSTERED VOLUME. REASON: UNABLE TO MAP LUN TO HOST"

APAR status

• Closed as program error.

Error description

• Hyper-v virtual machine backup will fail if there are multiple
  iSCSI initiators with the same IQN on Hyper-V server.
  As an example, the following error messages can be seen from
  the virgo log:
  [timestamp] INFO  pool-393-thread-1
  c.c.e.s.common.storage.vsnap.VsnapStorageConnection
    1563372651210 param:
  {"name":"04fe9ebc-faef-384f-9005-e0ddc16e2978-1563372708","iqns"
  :["
  iqn.yyyymm.backward-naming-authority:unique-device-name","iqn.yy
  yymm.backward-naming-authority:unique-device-name","iqn.yyyymm.b
  ackward-naming-authority:unique-device-name"]}
  ......
  [timestamp] INFO  pool-393-thread-1
  c.c.e.s.common.storage.vsnap.VsnapStorageConnection
    1563372651210  reason : {"message":"Failed to create host:
  Host (2) is already associated with initiator
  iqn.yyyymm.backward-naming-authority:unique-device-name","type":
  "HostCreateError"} message :"Failed to create host: Host (2) is
  already associated with initiator
  iqn.yyyymm.backward-naming-authority:unique-device-name"type
  :"HostCreateError"
  The following Powershell command can be used on the Hyper-v
  server to determine if multiple iSCSI initiators with the same
  IQN exist:
  Get-InitiatorPort -ConnectionType iSCSI | fl *
  This error occurs because the duplicated initiators could not
  be properly filtered out before sending the request to vSnap
  for host creation.
  Initial impact: Medium
  Versions Affected: 10.1.*
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * IBM Spectrum Protect Plus level 10.1.4                       *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * see ERROR DEescription                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply fixing level when available. This problem is currently *
  * projected to be fixed IBM Spectrum Protect Plus level        *
  * 10.1.4.254 and 10.1.5. Note that this is subject to change   *
  * at the discretion of IBM.                                    *
  ****************************************************************
  

Problem conclusion

• In certain circumstances a duplicate iSCSI IQN is passed when
  trying to map the backup storage volume to the hypervisor host.
  This caused an error when attempting to map those disks. A
  correction was made in the software to prevent this condition.
  

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:

Fix information

• Fixed component name

  SP PLUS

• Fixed component ID

  5737SPLUS

Applicable component levels