Consistent volatile access to running flag in Lifecycle implementations [SPR-16596]

[spring-projects-issues]

Juergen Hoeller opened SPR-16596 and commented

As #21031 revealed, several of our Lifecycle implementations enforce overly strong locks, in particular in their isRunning() implementations. As we do in a many places already, running should be a volatile flag that can be checked outside of any lifecycle monitor.

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Affects: 4.3.14, 5.0.4

Issue Links:

• Deadlock in SubProtocolWebSocketHandler on shutdown with Undertow [SPR-16488] #21031 Deadlock in SubProtocolWebSocketHandler on shutdown with Undertow

Referenced from: commits b8c92ce

Backported to: 4.3.15