Artem Bilan 19e8a65061 GH-3473: Fix dead lock around lifecycleLock ...

Fixes https://github.com/spring-projects/spring-integration/issues/3473

When `AbstractEndpoint.start()` and `AbstractEndpoint.isRunning()`
are called from different thread on `synchronized` methods,
we may end up with a dead lock: one thread waits for monitor on
`synchronized` and another waits for the `lifecycleLock`

* Change `AbstractEndpoint.isRunning()` to a plain `return this.running;`
- there is no reason in a lock around returning this `volatile` property state

**Cherry-pick to 5.4.x & 5.3.x**

2021-01-27 11:45:43 -05:00

..

main

GH-3473: Fix dead lock around lifecycleLock

2021-01-27 11:45:43 -05:00

test

Rely on MProducerSupport.active for Flux (#3423)

2020-11-06 14:05:35 -05:00