5.8 Is it possible to have a deadlock involving only a single process? Explain your answer.

No, it is not possible to have a deadlock involving only a single process. Deadlock occurs when two or more processes are blocked and waiting for each other to release resources. A single process cannot block itself, so there is no way for a deadlock to occur. However, a single process can experience a livelock, where it is continuously executing with no progress due to a repeated failure to acquire a resource.

相关问题

Is it possible to have a deadlock involving only a single process? Explain your answer.

No, it is not possible to have a deadlock involving only a single process because a deadlock occurs when two or more processes are waiting for each other to release resources that they are holding. In a single process, there is no other process to hold resources and cause a deadlock. However, a single process can enter a state of livelock where it keeps repeating the same action without making progress, but this is not a deadlock.

java.sql.BatchUpdateException: Deadlock found when trying to get lock; try restarting transaction ; Deadlock found when trying to get lock; try restarting transaction; nested exception is java.sql.BatchUpdateException: Deadlock found when trying to get lock; try restarting transaction

这是一个 Java SQL 异常，表示在尝试获取锁时出现了死锁，建议重启事务以解决问题。这种异常通常发生在并发访问数据库时，多个线程或进程同时请求同一个资源而导致的互相等待。要解决这个问题，可以采取一些策略，如优化数据库设计、降低并发访问量、增加锁的粒度、使用更好的锁机制等。具体的解决方法需要根据具体情况而定。