During a virtual machine migration, the forklift control pod enters a Error/CrashLoopBackOff state.

In the Main container logs we see the following panic:

~~~
2025-03-03T19:15:31.628724969Z {"level":"info","ts":"2025-03-03 19:15:31.628","msg":"Observed a panic in reconciler: runtime error: invalid memory address or nil pointer dereference","controller":"plan","object":{"name":"plan_name","namespace":"openshift-mtv"},"namespace":"openshift-mtv","name":"plan_name","reconcileID":"0ffbfc41-ce7d-1111-2222-f1f84f5bb2f9"}
2025-03-03T19:15:31.630841857Z panic: runtime error: invalid memory address or nil pointer dereference [recovered]
2025-03-03T19:15:31.630841857Z  panic: runtime error: invalid memory address or nil pointer dereference
2025-03-03T19:15:31.630841857Z [signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0x1d49d09]
2025-03-03T19:15:31.630849775Z 
2025-03-03T19:15:31.630849775Z goroutine 400 [running]:
2025-03-03T19:15:31.630859246Z sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile.func1()
2025-03-03T19:15:31.630859246Z  /remote-source/app/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:116 +0x1e5
2025-03-03T19:15:31.630863161Z panic({0x2c3e700?, 0x4faeb40?})
2025-03-03T19:15:31.630866846Z  /usr/lib/golang/src/runtime/panic.go:914 +0x21f
2025-03-03T19:15:31.630871653Z github.com/konveyor/forklift-controller/pkg/controller/plan/adapter/vsphere.(*Builder).mapDisks(0xc0036052d8, 0x2d028c0?, {{0xc0018416c0, 0xa}, {0xc0018416d0, 0xe}, {0x0, 0x0}, {0x0, 0x0}}, ...)
2025-03-03T19:15:31.630882045Z  /remote-source/app/pkg/controller/plan/adapter/vsphere/builder.go:714 +0x549
2025-03-03T19:15:31.630885791Z github.com/konveyor/forklift-controller/pkg/controller/plan/adapter/vsphere.(*Builder).VirtualMachine(0xc0036052d8, {{0xc0018416c0, 0xa}, {0xc0018416d0, 0xe}, {0x0, 0x0}, {0x0, 0x0}}, 0xc00132db08, ...)
2025-03-03T19:15:31.630895984Z  /remote-source/app/pkg/controller/plan/adapter/vsphere/builder.go:545 +0x485
2025-03-03T19:15:31.630899548Z github.com/konveyor/forklift-controller/pkg/controller/plan.(*KubeVirt).virtualMachine(0xc003295eb8, 0xc001d02c40)
2025-03-03T19:15:31.630902930Z  /remote-source/app/pkg/controller/plan/kubevirt.go:1353 +0xab3
2025-03-03T19:15:31.630906571Z github.com/konveyor/forklift-controller/pkg/controller/plan.(*KubeVirt).EnsureVM(0xc003295eb8, 0xc001d02c40)
2025-03-03T19:15:31.630906571Z  /remote-source/app/pkg/controller/plan/kubevirt.go:436 +0x39a
2025-03-03T19:15:31.630940319Z github.com/konveyor/forklift-controller/pkg/controller/plan.(*Migration).execute(0xc003295ea0, 0xc001d02c40)
2025-03-03T19:15:31.630940319Z  /remote-source/app/pkg/controller/plan/migration.go:890 +0xade8
2025-03-03T19:15:31.630944138Z github.com/konveyor/forklift-controller/pkg/controller/plan.(*Migration).Run(0xc003295ea0)
2025-03-03T19:15:31.630944138Z  /remote-source/app/pkg/controller/plan/migration.go:219 +0x285
2025-03-03T19:15:31.630948033Z github.com/konveyor/forklift-controller/pkg/controller/plan.(*Reconciler).execute(0xc001d91590, 0xc001b57800)
2025-03-03T19:15:31.630951539Z  /remote-source/app/pkg/controller/plan/controller.go:428 +0x98b
2025-03-03T19:15:31.630955068Z github.com/konveyor/forklift-controller/pkg/controller/plan.Reconciler.Reconcile({{{0x36a1518, 0xc00089af80}, {0x36bd2c0, 0xc0007c8510}, {0x36b4018, 0xc0007b9d60}}}, {0x36cb840?, 0xc000ac9ce8?}, {{{0xc002a89650, 0xd}, ...}})
2025-03-03T19:15:31.630968510Z  /remote-source/app/pkg/controller/plan/controller.go:257 +0x9de
2025-03-03T19:15:31.630972006Z sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Reconcile(0x36b22e8?, {0x36aebd8?, 0xc001d91560?}, {{{0xc002a89650?, 0xb?}, {0xc002314210?, 0x0?}}})
2025-03-03T19:15:31.630978590Z  /remote-source/app/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:119 +0xb7
2025-03-03T19:15:31.630982031Z sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).reconcileHandler(0xc000d17360, {0x36aec10, 0xc0007b7540}, {0x2e657c0?, 0xc001414100?})
2025-03-03T19:15:31.630988862Z  /remote-source/app/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:316 +0x3cc
2025-03-03T19:15:31.630992362Z sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).processNextWorkItem(0xc000d17360, {0x36aec10, 0xc0007b7540})
2025-03-03T19:15:31.630992362Z  /remote-source/app/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:266 +0x1c9
2025-03-03T19:15:31.630995977Z sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2.2()
2025-03-03T19:15:31.630995977Z  /remote-source/app/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:227 +0x79
2025-03-03T19:15:31.630999768Z created by sigs.k8s.io/controller-runtime/pkg/internal/controller.(*Controller).Start.func2 in goroutine 174
2025-03-03T19:15:31.631003224Z  /remote-source/app/vendor/sigs.k8s.io/controller-runtime/pkg/internal/controller/controller.go:223 +0x565
~~~

OpenShift: 4.16.5
CNV: 4.16.6
MTV: v2.7.10

Unknown

1. Create multi virtual machine migration plan from VMware provider.
2. Start the migration 

Some virtual machines are successfully migrated, others fail to complete due to crashing forklift control pod.

All virtual machines successfully migrate.

The current workaround is to cancel the migration, archive the plan and create a new plan with the virtual machines that didn't migrate during the first plan.