I am trying to run a simple test case which has 2 Shifts(PlanningEntity) and 2 Employees (PlanningVariable)

On running my test case , its running in infinite loop with below logs

NORMAL_OUTPUT{ 2024-07-23 15:30:12 TRACE FilteringMoveSelector:133 –
Move (com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b} <->
com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b}) filtered out by a
selection filter (Doable moves only). []

NORMAL_OUTPUT{ 2024-07-23 15:30:12 TRACE FilteringMoveSelector:133 –
Move (com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b} <->
com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b}) filtered out by a
selection filter (Doable moves only). []

NORMAL_OUTPUTv 2024-07-23 15:30:12 TRACE LocalSearchDecider:128 –
Move index (0), score (0hard/0soft), accepted (true), move
(com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b} <->
com.business.shift.entity.ShiftOccurrence@d1e5fb82
{com.business.shift.EmployeeShiftDetails@8f27f1f}). []

NORMAL_OUTPUTÇ 2024-07-23 15:30:12 DEBUG DefaultLocalSearchPhase:136

• LS step (4393290), time spent (487837), score (0hard/0soft),     best score (0hard/0soft), accepted/selected move count (1/1), picked
  

move (com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b} <->
com.business.shift.entity.ShiftOccurrence@d1e5fb82
{com.business.shift.EmployeeShiftDetails@8f27f1f}). []

NORMAL_OUTPUTy 2024-07-23 15:30:12 TRACE FilteringMoveSelector:133 –
Move (com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@8f27f1f} <->
com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@8f27f1f}) filtered out by a
selection filter (Doable moves only). []

NORMAL_OUTPUTv 2024-07-23 15:30:12 TRACE LocalSearchDecider:128 –
Move index (0), score (0hard/0soft), accepted (true), move
(com.business.shift.entity.ShiftOccurrence@d1e5fb82
{com.business.shift.EmployeeShiftDetails@ea28db8b} <->
com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@8f27f1f}). []

NORMAL_OUTPUTÇ 2024-07-23 15:30:12 DEBUG DefaultLocalSearchPhase:136

• LS step (4393291), time spent (487838), score (0hard/0soft),     best score (0hard/0soft), accepted/selected move count (1/1), picked
  

move (com.business.shift.entity.ShiftOccurrence@d1e5fb82
{com.business.shift.EmployeeShiftDetails@ea28db8b} <->
com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@8f27f1f}). []

NORMAL_OUTPUT6 2024-07-23 15:30:12 TRACE LocalSearchDecider:128 –
Move index (0), score (0hard/0soft), accepted (true), move
(com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b ->
com.business.shift.EmployeeShiftDetails@8f27f1f}). []

NORMAL_OUTPUT‡ 2024-07-23 15:30:12 DEBUG DefaultLocalSearchPhase:136

• LS step (4393292), time spent (487838), score (0hard/0soft),     best score (0hard/0soft), accepted/selected move count (1/1), picked
  

move (com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@ea28db8b ->
com.business.shift.EmployeeShiftDetails@8f27f1f}). []

NORMAL_OUTPUTy 2024-07-23 15:30:12 TRACE FilteringMoveSelector:133 –
Move (com.business.shift.entity.ShiftOccurrence@d1e5fb82
{com.business.shift.EmployeeShiftDetails@8f27f1f} <->
com.business.shift.entity.ShiftOccurrence@d1e5fb82
{com.business.shift.EmployeeShiftDetails@8f27f1f}) filtered out by a
selection filter (Doable moves only). []

NORMAL_OUTPUT9 2024-07-23 15:30:12 TRACE FilteringMoveSelector:133 –
Move (com.business.shift.entity.ShiftOccurrence@ec8c4d30
{com.business.shift.EmployeeShiftDetails@8f27f1f ->
com.business.shift.EmployeeShiftDetails@8f27f1f}) filtered out by a
selection filter (Doable moves only). []

To debug the issue, below is what I tried

1. If my understanding is correct, this issue could happen when constraints are tight this could happen, hence I commented all the constraints

2. Made sure that the problem is not complex with simple data [only 2 Shifts and 2 Employees ]

3. Enabled trace logs to debug , to see if i get any information

Questions I have is

1. How to find out the cause of inifinite loop
2. Though i have set timefold.solver.termination.spent-limit=1m why doesnt the solver terminate ?
3. Under what condition does solver get into infinite loop

Below is the simple test data that I am running – 2 ShiftOccurrences(PlanningEntity) and 2 EmployeeShiftDetails (PlanningVariable)