This article examines two variants of the Working Vacation framework that are controlled by a Classical Retrial Policy. These variants include dual server failures and a retrial queue with disruptions during operational breaks .The long-run client distribution in a M/M/1 queue during operational breaks is determined using the matrix geometric method. Failures may arise in both the server's active operation and its working vacation phase. The server can offer consumers alternate service, and client arrivals are dependent on the server's condition, adhering to the First-Come-First-Served rule. In particular, a functional vacation queue for M/M/1 retrials interruptions is the subject of the study. A customer enters an infinitely large orbit when they come and the server is already occupied. Following the classical retrial policy, clients waiting in the retrial queue repeatedly attempt to obtain service once the server is accessible. The retrial rate is denoted by ????????, where ???? is the orbit size. Additionally, a working vacation is interrupted if customers are still in the system at the end of service during that time. A sensitivity analysis is also included in the article to assess the impact of different elements on the system's performance. A discussion of cost optimization and numerical examples are included in the end.
