Issue

In Redhat RHEV 3.3 attempting to migrate a guest to a specific host / hypervisor that does not have sufficient scheduling memory for said guest yields an ambiguous host not found error. The error is misleading if you don't expect this behavior.

[RHEVM shell (connected)]# info

backend version: 3.3
sdk version    : 3.3.0.21.*final-.1
cli version    : 3.3.0.13.*final-.1
python version : 2.6.6.final.0

entry point : https://123.acme.com/api

[RHEVM shell (connected)]# action vm 123vm migrate --host-name 123rhelhost


error:
status: 400
reason: Bad Request
detail: Host not found.

[RHEVM shell (connected)]# show vm 123vm | grep memory
memory                    : 4294967296
memory_policy-guaranteed  : 4294967296

[RHEVM shell (connected)]# show host 123rhelhost

id                                    : 392fe10a-06cc-4b8a-8570-9aa7f429d7ba
name                                  : 123rhelhost
address                               : 123rhelhost.acme.com
certificate-organization              : CME Lab RHEV Testing A
certificate-subject                   : O=CME Lab RHEV Testing A,CN=123rhelhost.acme.com
cluster-id                            : 8ad3f67e-1e40-46d2-9c42-5583e604206c
cpu-name                              : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz
cpu-speed                             : 2601.0
cpu-topology-cores                    : 8
cpu-topology-sockets                  : 2
cpu-topology-threads                  : 2
hardware_information-family           : Not Specified
hardware_information-manufacturer     : Dell Inc.
hardware_information-product_name     : PowerEdge R620
hardware_information-serial_number    : FNWBQV1
hardware_information-uuid             : 4C4C4544-004E-5710-8042-C6C04F515631
hardware_information-version          : Not Specified
iscsi-initiator                       : iqn.1994-05.com.redhat:980cfedb4d
ksm-enabled                           : True
libvirt_version-build                 : 2
libvirt_version-full_version          : libvirt-0.10.2-29.el6_5.2
libvirt_version-major                 : 0
libvirt_version-minor                 : 10
libvirt_version-revision              : 0
max_scheduling_memory                 : 1652555776
memory                                : 67504177152
os-type                               : RHEL
os-version-full_version               : 6Server - 6.5.0.1.el6
port                                  : 54321
power_management-address              : 123rhelhost
power_management-agents-agent-address : 123rhelhost
power_management-agents-agent-order   : 1
power_management-agents-agent-type    : cmellsc
power_management-agents-agent-username: rhevfence
power_management-enabled              : True
power_management-type                 : cmellsc
power_management-username             : rhevfence
ssh-fingerprint                       : 30:fc:8c:21:25:97:f1:ac:9c:ef:b5:41:9d:63:fc:1a
ssh-port                              : 22
status-state                          : up
storage_manager-priority              : 5
storage_manager-valueOf               : false
summary-active                        : 15
summary-migrating                     : 0
summary-total                         : 15
transparent_hugepages-enabled         : True
type                                  : rhel
version-build                         : 2
version-full_version                  : vdsm-4.13.2-0.6.el6ev
version-major                         : 4
version-minor                         : 13
version-revision                      : 0

2014-01-27 22:10:50,963 INFO  [org.ovirt.engine.core.bll.MigrateVmToServerCommand] (ajp-/127.0.0.1:8702-50) [209c4e1f] Lock Acquired to object EngineLock [exc
lusiveLocks= key: 077d3787-b472-4e8f-8abd-50cef342cb23 value: VM
, sharedLocks= ]
2014-01-27 22:10:51,913 INFO  [org.ovirt.engine.core.bll.scheduling.SchedulingManager] (ajp-/127.0.0.1:8702-50) [209c4e1f] Candidate host 123rhelhost (392fe10a-06c
c-4b8a-8570-9aa7f429d7ba) was filtered out by VAR__FILTERTYPE__INTERNAL filter Memory
2014-01-27 22:10:51,994 INFO  [org.ovirt.engine.core.bll.MigrateVmToServerCommand] (ajp-/127.0.0.1:8702-50) [209c4e1f] Running command: MigrateVmToServerComma
nd internal: false. Entities affected :  ID: 077d3787-b472-4e8f-8abd-50cef342cb23 Type: VM
2014-01-27 22:10:52,259 INFO  [org.ovirt.engine.core.bll.scheduling.SchedulingManager] (ajp-/127.0.0.1:8702-50) [209c4e1f] Candidate host 123rhelhost (392fe10a-06c
c-4b8a-8570-9aa7f429d7ba) was filtered out by VAR__FILTERTYPE__INTERNAL filter Memory (correlation id: 209c4e1f)
2014-01-27 22:10:52,260 ERROR [org.ovirt.engine.core.bll.MigrateVmToServerCommand] (ajp-/127.0.0.1:8702-50) [209c4e1f] Command org.ovirt.engine.core.bll.Migra
teVmToServerCommand throw Vdc Bll exception. With error message VdcBLLException: RESOURCE_MANAGER_VDS_NOT_FOUND (Failed with error RESOURCE_MANAGER_VDS_NOT_FO
UND and code 5004)
2014-01-27 22:10:52,262 ERROR [org.ovirt.engine.core.bll.MigrateVmToServerCommand] (ajp-/127.0.0.1:8702-50) [209c4e1f] Transaction rolled-back for command: or
g.ovirt.engine.core.bll.MigrateVmToServerCommand.
2014-01-27 22:10:52,282 INFO  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ajp-/127.0.0.1:8702-50) [209c4e1f] Correlation ID: 209c4e1f, Job ID: 566da75a-c737-4127-8e2c-8b64a928cb2f, Call Stack: null, Custom Event ID: -1, Message: Migration failed  (VM: 123vm, Source: xyz111, Destination: <UNKNOWN>).
2014-01-27 22:10:52,292 INFO  [org.ovirt.engine.core.bll.MigrateVmToServerCommand] (ajp-/127.0.0.1:8702-50) [209c4e1f] Lock freed to object EngineLock [exclusiveLocks= key: 077d3787-b472-4e8f-8abd-50cef342cb23 value: VM
, sharedLocks= ]