[test] Unstable test FlussAuthorizationITCase. testInitWriter

[wuchong]

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Fluss version

main (development)

Please describe the bug 🐞

https://github.com/apache/fluss/actions/runs/21698664388/job/62574270578

[INFO] Running org.apache.fluss.client.table.FlussTableITCase
Error:  Tests run: 22, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 181.549 s <<< FAILURE! - in org.apache.fluss.client.security.acl.FlussAuthorizationITCase
Error:  org.apache.fluss.client.security.acl.FlussAuthorizationITCase.testInitWriter  Time elapsed: 71.391 s  <<< FAILURE!
java.lang.AssertionError: 

Expecting Optional to contain a value but it was empty.
	at org.apache.fluss.server.testutils.FlussClusterExtension.waitReplicaInAssignmentReady(FlussClusterExtension.java:619)
	at org.apache.fluss.server.testutils.FlussClusterExtension.lambda$waitUntilTableReady$8(FlussClusterExtension.java:558)
	at org.apache.fluss.testutils.common.CommonTestUtils.retry(CommonTestUtils.java:142)
	at org.apache.fluss.server.testutils.FlussClusterExtension.waitUntilTableReady(FlussClusterExtension.java:552)
	at org.apache.fluss.client.security.acl.FlussAuthorizationITCase.testInitWriter(FlussAuthorizationITCase.java:549)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:727)
	at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
	at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:156)
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:147)
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:86)
	at org.junit.jupiter.engine.execution.InterceptingExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(InterceptingExecutableInvoker.java:103)

Solution

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[Prajwal-banakar]

"Hi @wuchong,

I investigated this issue and attempted to reproduce the failure locally by running FlussAuthorizationITCase#testInitWriter in a loop 100 times. On my local environment, the test passed consistently without hitting the AssertionError.

However, the stack trace clearly points to a race condition in FlussClusterExtension.java where the metadata is checked before the Coordinator finishes the leader election. i think a fix that replaces the strict assertThat with a waitValue retry mechanism to ensure the test remains stable in slower CI environments.

Let me know if you have any other suggestions!"