Shilun Fan created RATIS-2514:
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Summary: Fix flaky TestReadOnlyRequestWithGrpc.testReadAfterWrite
Key: RATIS-2514
URL: https://issues.apache.org/jira/browse/RATIS-2514
Project: Ratis
Issue Type: Sub-task
Components: gRPC
Reporter: Shilun Fan
Assignee: Shilun Fan
TestReadOnlyRequestWithGrpc.testReadAfterWrite may fail intermittently with:
{code:java}
AssertionFailedError: expected: <true> but was: <false> {code}
The failing assertion compares the result of an async read-after-write request
with a concurrent linearizable read:
{code:java}
Assertions.assertTrue(retrieve(readAfterWrite.get()) >=
retrieve(linearizable.get())); {code}
This assumption is unreliable. The test sends multiple async writes without
waiting for them to complete, then issues a linearizable read and a
read-after-write request concurrently. These two reads may observe different
linearization points and different subsets of concurrent writes, so
read-after-write is not guaranteed to return a value greater than or equal to
the concurrent linearizable read.
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