Spring 并行初始化

[diguage]

1. Parallel bean initialization during startup [SPR-8767] · Issue #13410 · spring-projects/spring-framework
2. Synchronization during singleton creation may result in deadlock · Issue #23501 · spring-projects/spring-framework
3. Revisit default lifecycle phases and timeouts (e.g. for ThreadPoolTaskScheduler) · Issue #32152 · spring-projects/spring-framework

分析一下实现过程