zanmato1984 commented on issue #40675:
URL: https://github.com/apache/arrow/issues/40675#issuecomment-2102574835
Repro in C++, at the chance of about one failure of tens.
```
TEST(AsofJoinTest, Flaky) {
std::vector<TypeHolder> left_types = {int64(), utf8()};
auto left_batch = ExecBatchFromJSON(
left_types, R"([[1, "a"], [1, "b"], [5, "a"], [6, "b"], [7, "f"]])");
std::vector<TypeHolder> right_types = {int64(), utf8(), float64()};
auto right_batch =
ExecBatchFromJSON(right_types, R"([[2, "a", 1.0], [9, "b", 3.0], [15,
"g", 5.0]])");
Declaration left{
"exec_batch_source",
ExecBatchSourceNodeOptions(schema({field("colA", int64()),
field("col2", utf8())}),
{std::move(left_batch)})};
Declaration right{
"exec_batch_source",
ExecBatchSourceNodeOptions(schema({field("colB", int64()),
field("col3", utf8()),
field("colC", float64())}),
{std::move(right_batch)})};
AsofJoinNodeOptions asof_join_opts({{{"colA"}, {{"col2"}}}, {{"colB"},
{{"col3"}}}}, 1);
Declaration asof_join{"asofjoin", {left, right}, asof_join_opts};
ASSERT_OK_AND_ASSIGN(auto result, DeclarationToExecBatches(asof_join));
std::vector<TypeHolder> exp_types = {int64(), utf8(), float64()};
auto exp_batch = ExecBatchFromJSON(
exp_types,
R"([[1, "a", 1.0], [1, "b", null], [5, "a", null], [6, "b", null], [7,
"f", null]])");
AssertExecBatchesEqualIgnoringOrder(result.schema, {exp_batch},
result.batches);
}
```
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