🔍 Build Scan® (commit: e3d98c8)

I noticed that the test failure in HealthCheckedEndpointGroupTest#cacheReflectsAttributeChanges seemed to stem from an unexpected ordering issue during initialization.

In this test, registering the endpoint is essentially part of the setup phase. However, the internal initialization of HealthCheckedEndpointGroup is asynchronous, and addListener(..., true) can synchronously invoke listener.accept(latest) before the system is ready, which introduces a race condition.

Initially, I thought calling whenReady().join() would fully synchronize the group’s initialization. However, after digging into the code, I realized that although join() ensures the group is initialized, it doesn’t control the timing of the listener callback.

Internally, addListener() acquires a lock to update the listener list, but the actual call to listener.accept(latest) (triggered by notifyLatestValue = true) occurs outside the lock. That means a race condition can still occur between listener.accept(...) and the external setup logic that expects a stable state.

To address this, I changed the approach:
1. I registered the listener using addListener(endpointListener, false) to avoid immediate invocation.
2. Then, after the group was fully initialized via whenReady().join(), I manually called listener.accept(...) to reflect the initial state in a safe and deterministic manner.

This ensures that the state propagation is explicitly controlled and prevents any premature callback from breaking the test setup.

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.08%. Comparing base (8150425) to head (e3d98c8).
⚠️ Report is 281 commits behind head on main.

@@             Coverage Diff              @@
##               main    #6188      +/-   ##
============================================
- Coverage     74.46%   74.08%   -0.38%     
- Complexity    22234    22992     +758     
============================================
  Files          1963     2061      +98     
  Lines         82437    86135    +3698     
  Branches      10764    11312     +548     
============================================
+ Hits          61385    63815    +2430     
- Misses        15918    16896     +978     
- Partials       5134     5424     +290     

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