[Enhancement] The variables hasNotified whether can declared without the volatile keyword?

[KimZhangJinMing]

Before Creating the Enhancement Request

• I have confirmed that this should be classified as an enhancement rather than a bug/feature.

Summary

In class ServiceThread. The variables hasNotified has been declared as AtomicBoolean. This is ensure the visibility, whether can declared without the volatile?
protected volatile AtomicBoolean hasNotified = new AtomicBoolean(false);

Motivation

This maybe cause confuse when view the source code.

Describe the Solution You'd Like

protected AtomicBoolean hasNotified = new AtomicBoolean(false);

Describe Alternatives You've Considered

None.

Additional Context

No response