XComp commented on PR #21751:
URL: https://github.com/apache/flink/pull/21751#issuecomment-1402104138
What speaks against replacing the `Thread.sleep(10L)` with a waiting
condition in the test?
```
CommonTestUtils.waitUtil(
() -> upTimeGauge.getValue() > 0L,
TestingUtils.infiniteDuration(),
"No non-zero uptime was measured.");
```
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