@startuml

left to right direction
skinparam linetype ortho
skinparam shadowing false

package "Before Partition" {
    rectangle "A\nretry = false" as A
    rectangle "B\nretry = true" as B
    rectangle "C\nretry = false" as C
    rectangle "D\nretry = true" as D

    A --> B : next
    B --> C : next
    C --> D : next
}

package "After Partition" {
    package "Ready Queue" {
        rectangle "A" as ReadyA
        rectangle "C" as ReadyC

        ReadyA --> ReadyC : next
    }

    package "Retry Queue" {
        rectangle "B" as RetryB
        rectangle "D" as RetryD

        RetryB --> RetryD : next
    }
}

A ..> ReadyA : move
B ..> RetryB : move
C ..> ReadyC : move
D ..> RetryD : move

@enduml