Purushottam Sinha created FLINK-40568:
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Summary:
ProcessTableFunctionSemanticTests[process-updating-multi-input] is flaky on
master
Key: FLINK-40568
URL: https://issues.apache.org/jira/browse/FLINK-40568
Project: Flink
Issue Type: Bug
Components: Table SQL / Planner
Affects Versions: 2.4.0
Reporter: Purushottam Sinha
h3. Problem
{{ProcessTableFunctionSemanticTests}} is flaky on master for the
{{process-updating-multi-input}} program. It runs the two-input updating PTF
join {{UpdatingJoinFunction}} and asserts the sink's raw changelog with
{{containsExactlyInAnyOrder}}, but a two-input operator has no deterministic
cross-input arrival order, so the emitted changelog varies. The test pins one
interleaving, so an alternate order fails the assertion.
h3. Evidence
* master run [https://github.com/apache/flink/actions/runs/33989974423]
(module: table) — {{runSteps(TableTestProgram)[64]}}
{{[process-updating-multi-input]}}, {{Tests run: 11458, Failures: 1}}.
* Failing assertion (job is awaited, so this is the complete output, not a
truncation):
{noformat}
Expecting actual:
["+I[Bob, score 2 in city London]", "+U[Bob, score 2 in city Berlin]"]
to contain exactly in any order:
["+I[Bob, score 5 in city London]", "+I[Alice, score 2 in city Zurich]",
"+U[Bob, score 3 in city London]", "+U[Bob, score 3 in city Berlin]",
"-D[Bob, null]", "+I[Bob, score 2 in city Berlin]", "-D[Alice, null]"]
{noformat}
* The failing run's head SHA is current master ({{c51e71536ed}}); the same
commit passed 51/51 local runs (JDK 17), so this is a flake, not a regression
at this commit.
h3. Notes
* The final upsert-materialized result converges across interleavings; only the
raw changelog differs. A fix could assert the materialized result instead of
the raw changelog for this program, or otherwise make the expectation
interleave-independent.
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