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Fix flaky TestPrometheusIntegrationStatus.testPushDown #10778

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merged 2 commits into from
Jan 26, 2022
Merged

Fix flaky TestPrometheusIntegrationStatus.testPushDown #10778

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6cef6c2
Allow setting extra properties in Prometheus query runner
ebyhr Jan 25, 2022
a4ab269
Tweak assertion in TestPrometheusIntegrationStatus.testPushDown
ebyhr Jan 25, 2022
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6 changes: 3 additions & 3 deletions plugin/trino-prometheus/src/test/java/io/trino/plugin/prometheus/PrometheusQueryRunner.java
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Original file line number Diff line number Diff line change
Expand Up @@ -33,12 +33,12 @@ public final class PrometheusQueryRunner
{
private PrometheusQueryRunner() {}

public static DistributedQueryRunner createPrometheusQueryRunner(PrometheusServer server)
public static DistributedQueryRunner createPrometheusQueryRunner(PrometheusServer server, Map<String, String> extraProperties)
throws Exception
{
DistributedQueryRunner queryRunner = null;
try {
queryRunner = DistributedQueryRunner.builder(createSession()).build();
queryRunner = DistributedQueryRunner.builder(createSession()).setExtraProperties(extraProperties).build();

queryRunner.installPlugin(new PrometheusPlugin());
Map<String, String> properties = ImmutableMap.of(
Expand Down Expand Up @@ -75,7 +75,7 @@ public static void main(String[] args)
throws Exception
{
Logging.initialize();
DistributedQueryRunner queryRunner = createPrometheusQueryRunner(new PrometheusServer());
DistributedQueryRunner queryRunner = createPrometheusQueryRunner(new PrometheusServer(), ImmutableMap.of("http-server.http.port", "8080"));
Thread.sleep(10);
Logger log = Logger.get(PrometheusQueryRunner.class);
log.info("======== SERVER STARTED ========");
Expand Down
8 changes: 5 additions & 3 deletions ...-prometheus/src/test/java/io/trino/plugin/prometheus/TestPrometheusIntegrationStatus.java
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Expand Up @@ -13,6 +13,7 @@
*/
package io.trino.plugin.prometheus;

import com.google.common.collect.ImmutableMap;
import io.airlift.log.Logger;
import io.trino.testing.AbstractTestQueryFramework;
import io.trino.testing.MaterializedResult;
Expand All @@ -26,6 +27,7 @@
import java.util.concurrent.TimeUnit;

import static io.trino.plugin.prometheus.PrometheusQueryRunner.createPrometheusQueryRunner;
import static org.assertj.core.api.Assertions.assertThat;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.fail;

Expand All @@ -43,7 +45,7 @@ protected QueryRunner createQueryRunner()
throws Exception
{
this.server = new PrometheusServer();
return createPrometheusQueryRunner(server);
return createPrometheusQueryRunner(server, ImmutableMap.of());
}

@Test
Expand Down Expand Up @@ -100,8 +102,8 @@ public void testConfirmMetricAvailableAndCheckUp()
@Test
public void testPushDown()
{
// default interval on the `up` metric that Prometheus records on itself is 15 seconds, so this should only yield one row
// default interval on the `up` metric that Prometheus records on itself is about 15 seconds, so this should only yield one or two row
MaterializedResult results = computeActual("SELECT * FROM prometheus.default.up WHERE timestamp > (NOW() - INTERVAL '15' SECOND)");
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Can we instead create a timestamp literal in Java side and then send that as the predicate.
In the MaterializedResult then we can assert that all rows have a timestamp > the predicate (instead of counting number of rows which is inherently flaky).

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Also if we want to test pushdown happenned we should assert on the plan. Since even without pushdown the engine will filter results and we'll get filtered rows.

It's pre-existing issue though.

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Let me punt to #10784

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Do we have some stress test results somewhere? LGTM.

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Tested locally because the failure ratio was very low (1 / 500 attempts) in my laptop. Verified 2000 passes with this fix.

assertEquals(results.getRowCount(), 1);
assertThat(results).hasSizeBetween(1, 2);
}
}