jacek-lewandowski commented on code in PR #2534: URL: https://github.com/apache/cassandra/pull/2534#discussion_r1314657454
########## test/distributed/org/apache/cassandra/distributed/test/accord/AccordMetricsTest.java: ########## @@ -0,0 +1,258 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.cassandra.distributed.test.accord; + +import java.io.IOException; +import java.util.HashMap; +import java.util.Map; +import java.util.function.Function; + +import org.junit.Before; +import org.junit.BeforeClass; +import org.junit.Test; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import org.apache.cassandra.distributed.api.ConsistencyLevel; +import org.apache.cassandra.distributed.api.IMessageFilters; +import org.apache.cassandra.exceptions.ReadTimeoutException; +import org.apache.cassandra.exceptions.WriteTimeoutException; +import org.apache.cassandra.metrics.AccordMetrics; +import org.apache.cassandra.metrics.DefaultNameFactory; +import org.apache.cassandra.net.Verb; +import org.apache.cassandra.service.accord.AccordService; +import org.apache.cassandra.service.accord.exceptions.ReadPreemptedException; +import org.apache.cassandra.service.accord.exceptions.WritePreemptedException; + +import static org.assertj.core.api.Assertions.assertThat; + + +public class AccordMetricsTest extends AccordTestBase +{ + private static final Logger logger = LoggerFactory.getLogger(AccordMetricsTest.class); + + @Override + protected Logger logger() + { + return logger; + } + + @BeforeClass + public static void setupClass() throws IOException + { + AccordTestBase.setupClass(); + SHARED_CLUSTER.forEach(node -> node.runOnInstance(() -> AccordService.instance().createEpochFromConfigUnsafe())); + SHARED_CLUSTER.forEach(node -> node.runOnInstance(() -> AccordService.instance().setCacheSize(0))); + for (int i = 0; i < SHARED_CLUSTER.size(); i++) // initialize metrics + logger.trace(SHARED_CLUSTER.get(i + 1).callOnInstance(() -> AccordMetrics.readMetrics.toString() + AccordMetrics.writeMetrics.toString())); + } + + String writeCql() + { + return "BEGIN TRANSACTION\n" + + " LET val = (SELECT v FROM " + currentTable + " WHERE k=? AND c=?);\n" + + " SELECT val.v;\n" + + " UPDATE " + currentTable + " SET v = v + 1 WHERE k=? AND c=?;\n" + + "COMMIT TRANSACTION"; + } + + String readCql() + { + return "BEGIN TRANSACTION\n" + + " LET val = (SELECT v FROM " + currentTable + " WHERE k=? AND c=?);\n" + + " SELECT val.v;\n" + + "COMMIT TRANSACTION"; + } + + Map<Integer, Map<String, Long>> countingMetrics0; + + @Before + public void beforeTest() + { + SHARED_CLUSTER.filters().reset(); + SHARED_CLUSTER.schemaChange("CREATE TABLE " + currentTable + " (k int, c int, v int, PRIMARY KEY (k, c))"); + SHARED_CLUSTER.coordinator(1).execute("INSERT INTO " + currentTable + " (k, c, v) VALUES (0, 0, 0)", ConsistencyLevel.ALL); + } + + @Test + public void testRegularMetrics() throws Exception + { + countingMetrics0 = getMetrics(); + SHARED_CLUSTER.coordinator(1).executeWithResult(writeCql(), ConsistencyLevel.ALL, 0, 0, 0, 0); + assertCoordinatorMetrics(0, "rw", 1, 0, 0, 0, 0); + assertCoordinatorMetrics(1, "rw", 0, 0, 0, 0, 0); + assertReplicaMetrics(0, "rw", 1, 1, 1); + assertReplicaMetrics(1, "rw", 1, 1, 1); + assertZeroMetrics("ro"); + + countingMetrics0 = getMetrics(); + SHARED_CLUSTER.coordinator(1).executeWithResult(readCql(), ConsistencyLevel.ALL, 0, 0); + assertCoordinatorMetrics(0, "ro", 1, 0, 0, 0, 0); + assertCoordinatorMetrics(1, "ro", 0, 0, 0, 0, 0); + assertReplicaMetrics(0, "ro", 1, 1, 0); + assertReplicaMetrics(1, "ro", 1, 1, 0); + assertZeroMetrics("rw"); + } + + @Test + public void testPreemptionMetrics() + { + IMessageFilters.Filter commitFilter = SHARED_CLUSTER.filters().outbound().verbs(Verb.ACCORD_COMMIT_REQ.id).from(1).to(2).drop(); + commitFilter.on(); + + countingMetrics0 = getMetrics(); + try + { + SHARED_CLUSTER.coordinator(1).executeWithResult(writeCql(), ConsistencyLevel.ALL, 0, 0, 0, 0); + } + catch (RuntimeException t) + { + assertThat(t.getCause().getClass().getName()).isEqualTo(WritePreemptedException.class.getName()); + } + + assertCoordinatorMetrics(0, "rw", 1, 0, 1, 0, 0); + assertCoordinatorMetrics(1, "rw", 0, 0, 0, 0, 1); + assertReplicaMetrics(0, "rw", 1, 1, 1); + assertReplicaMetrics(1, "rw", 1, 1, 1); + + assertZeroMetrics("ro"); + + countingMetrics0 = getMetrics(); + try + { + SHARED_CLUSTER.coordinator(1).executeWithResult(readCql(), ConsistencyLevel.ALL, 0, 0); + } + catch (RuntimeException t) + { + assertThat(t.getCause().getClass().getName()).isEqualTo(ReadPreemptedException.class.getName()); + } + + assertCoordinatorMetrics(0, "ro", 1, 0, 1, 0, 0); + assertCoordinatorMetrics(1, "ro", 0, 0, 0, 0, 1); + assertReplicaMetrics(0, "ro", 1, 1, 0); + assertReplicaMetrics(1, "ro", 1, 1, 0); + + assertZeroMetrics("rw"); + } + + @Test + public void testTimeoutMetrics() + { + IMessageFilters.Filter preAcceptFilter = SHARED_CLUSTER.filters().outbound().verbs(Verb.ACCORD_PRE_ACCEPT_REQ.id).from(1).to(2).drop(); + preAcceptFilter.on(); + + countingMetrics0 = getMetrics(); + try + { + SHARED_CLUSTER.coordinator(1).executeWithResult(readCql(), ConsistencyLevel.ALL, 0, 0); + } + catch (RuntimeException t) + { + assertThat(t.getCause().getClass().getName()).isEqualTo(ReadTimeoutException.class.getName()); + } + + assertCoordinatorMetrics(0, "ro", 0, 0, 0, 1, 0); + assertCoordinatorMetrics(1, "ro", 0, 0, 0, 0, 0); + assertReplicaMetrics(0, "ro", 0, 0, 0); + assertReplicaMetrics(1, "ro", 0, 0, 0); + + assertZeroMetrics("rw"); + + countingMetrics0 = getMetrics(); + try + { + SHARED_CLUSTER.coordinator(1).executeWithResult(writeCql(), ConsistencyLevel.ALL, 0, 0, 0, 0); + } + catch (RuntimeException t) + { + assertThat(t.getCause().getClass().getName()).isEqualTo(WriteTimeoutException.class.getName()); + } + + assertCoordinatorMetrics(0, "rw", 0, 0, 0, 1, 0); + assertCoordinatorMetrics(1, "rw", 0, 0, 0, 0, 0); + assertReplicaMetrics(0, "rw", 0, 0, 0); + assertReplicaMetrics(1, "rw", 0, 0, 0); + + assertZeroMetrics("ro"); + } + + private void assertZeroMetrics(String scope) + { + for (int i = 0; i < SHARED_CLUSTER.size(); i++) + { + assertCoordinatorMetrics(i, scope, 0, 0, 0, 0, 0); + assertReplicaMetrics(i, scope, 0, 0, 0); + } + } + + private void assertCoordinatorMetrics(int node, String scope, long fastPathTrx, long slowPathTrx, long preemptions, long timeouts, long recoveries) + { + DefaultNameFactory nameFactory = new DefaultNameFactory("accord-coordinator", scope); + Map<String, Long> metrics = diff(countingMetrics0).get(node); + logger.info("Metrics for node {} / {}: {}", node, scope, metrics); + Function<String, Long> metric = n -> metrics.get(nameFactory.createMetricName(n).getMetricName()); + assertThat(metric.apply("FastPathTrx")).isEqualTo(fastPathTrx); + assertThat(metric.apply("SlowPathTrx")).isEqualTo(slowPathTrx); + assertThat(metric.apply("PreemptedTrx")).isEqualTo(preemptions); + assertThat(metric.apply("TimedoutTrx")).isEqualTo(timeouts); + assertThat(metric.apply("RecoveryDelay")).isEqualTo(recoveries); + assertThat(metric.apply("RecoveryTime")).isEqualTo(recoveries); + assertThat(metric.apply("Dependencies")).isEqualTo(fastPathTrx + slowPathTrx); + } + + private void assertReplicaMetrics(int node, String scope, long commits, long executions, long applications) + { + DefaultNameFactory nameFactory = new DefaultNameFactory("accord-replica", scope); + Map<String, Long> metrics = diff(countingMetrics0).get(node); + Function<String, Long> metric = n -> metrics.get(nameFactory.createMetricName(n).getMetricName()); + assertThat(metric.apply("CommitLatency")).isEqualTo(commits); + assertThat(metric.apply("ExecuteLatency")).isEqualTo(executions); + assertThat(metric.apply("ApplyLatency")).isEqualTo(applications); + assertThat(metric.apply("ApplyDuration")).isEqualTo(applications); + assertThat(metric.apply("Dependencies")).isEqualTo(executions); Review Comment: Do you mean just those strings or full mbean names? -- This is an automated message from the Apache Git Service. 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