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Example 1 with LEADER_ELECTION_TIMEOUT_COUNT_METRIC

use of org.apache.ratis.server.metrics.LeaderElectionMetrics.LEADER_ELECTION_TIMEOUT_COUNT_METRIC in project incubator-ratis by apache.

the class LeaderElectionTests method testLeaderElectionMetrics.

@Test
public void testLeaderElectionMetrics() throws IOException, InterruptedException {
    Timestamp timestamp = Timestamp.currentTime();
    final MiniRaftCluster cluster = newCluster(3);
    cluster.start();
    final RaftServer.Division leaderServer = waitForLeader(cluster);
    final RatisMetricRegistry ratisMetricRegistry = LeaderElectionMetrics.getMetricRegistryForLeaderElection(leaderServer.getMemberId());
    // Verify each metric individually.
    long numLeaderElections = ratisMetricRegistry.counter(LEADER_ELECTION_COUNT_METRIC).getCount();
    assertTrue(numLeaderElections > 0);
    long numLeaderElectionTimeout = ratisMetricRegistry.counter(LEADER_ELECTION_TIMEOUT_COUNT_METRIC).getCount();
    assertTrue(numLeaderElectionTimeout > 0);
    Timer timer = ratisMetricRegistry.timer(LEADER_ELECTION_TIME_TAKEN);
    double meanTimeNs = timer.getSnapshot().getMean();
    long elapsedNs = timestamp.elapsedTime().toLong(TimeUnit.NANOSECONDS);
    assertTrue(timer.getCount() > 0 && meanTimeNs < elapsedNs);
    Long leaderElectionLatency = (Long) ratisMetricRegistry.getGauges((s, metric) -> s.contains(LAST_LEADER_ELECTION_ELAPSED_TIME)).values().iterator().next().getValue();
    assertTrue(leaderElectionLatency > 0L);
}
Also used : LEADER_ELECTION_TIMEOUT_COUNT_METRIC(org.apache.ratis.server.metrics.LeaderElectionMetrics.LEADER_ELECTION_TIMEOUT_COUNT_METRIC) RaftGroupMemberId(org.apache.ratis.protocol.RaftGroupMemberId) TransferLeadershipException(org.apache.ratis.protocol.exceptions.TransferLeadershipException) CompletableFuture(java.util.concurrent.CompletableFuture) RaftGroupId(org.apache.ratis.protocol.RaftGroupId) Log4jUtils(org.apache.ratis.util.Log4jUtils) Level(org.apache.log4j.Level) ThreadLocalRandom(java.util.concurrent.ThreadLocalRandom) Assert.fail(org.junit.Assert.fail) JavaUtils(org.apache.ratis.util.JavaUtils) RaftTestUtil.waitForLeader(org.apache.ratis.RaftTestUtil.waitForLeader) Timestamp(org.apache.ratis.util.Timestamp) Logger(org.slf4j.Logger) Iterator(java.util.Iterator) RaftPeer(org.apache.ratis.protocol.RaftPeer) Assert.assertNotNull(org.junit.Assert.assertNotNull) RaftPeerId(org.apache.ratis.protocol.RaftPeerId) RaftServerConfigKeys(org.apache.ratis.server.RaftServerConfigKeys) Assert.assertTrue(org.junit.Assert.assertTrue) Test(org.junit.Test) IOException(java.io.IOException) Mockito.when(org.mockito.Mockito.when) BaseTest(org.apache.ratis.BaseTest) RatisMetricRegistry(org.apache.ratis.metrics.RatisMetricRegistry) RaftTestUtil(org.apache.ratis.RaftTestUtil) LeaderElectionMetrics(org.apache.ratis.server.metrics.LeaderElectionMetrics) TimeUnit(java.util.concurrent.TimeUnit) LEADER_ELECTION_TIME_TAKEN(org.apache.ratis.server.metrics.LeaderElectionMetrics.LEADER_ELECTION_TIME_TAKEN) List(java.util.List) LeaderSteppingDownException(org.apache.ratis.protocol.exceptions.LeaderSteppingDownException) LEADER_ELECTION_COUNT_METRIC(org.apache.ratis.server.metrics.LeaderElectionMetrics.LEADER_ELECTION_COUNT_METRIC) RaftClientReply(org.apache.ratis.protocol.RaftClientReply) RaftProperties(org.apache.ratis.conf.RaftProperties) DivisionInfo(org.apache.ratis.server.DivisionInfo) ExitUtils(org.apache.ratis.util.ExitUtils) LifeCycle(org.apache.ratis.util.LifeCycle) Optional(java.util.Optional) Timer(com.codahale.metrics.Timer) LAST_LEADER_ELECTION_ELAPSED_TIME(org.apache.ratis.server.metrics.LeaderElectionMetrics.LAST_LEADER_ELECTION_ELAPSED_TIME) RaftServer(org.apache.ratis.server.RaftServer) RaftClient(org.apache.ratis.client.RaftClient) Assert(org.junit.Assert) SegmentedRaftLogTestUtils(org.apache.ratis.server.raftlog.segmented.SegmentedRaftLogTestUtils) Assert.assertEquals(org.junit.Assert.assertEquals) TimeDuration(org.apache.ratis.util.TimeDuration) Mockito.mock(org.mockito.Mockito.mock) Timer(com.codahale.metrics.Timer) RaftServer(org.apache.ratis.server.RaftServer) Timestamp(org.apache.ratis.util.Timestamp) RatisMetricRegistry(org.apache.ratis.metrics.RatisMetricRegistry) Test(org.junit.Test) BaseTest(org.apache.ratis.BaseTest)

Aggregations

Timer (com.codahale.metrics.Timer)1 IOException (java.io.IOException)1 Iterator (java.util.Iterator)1 List (java.util.List)1 Optional (java.util.Optional)1 CompletableFuture (java.util.concurrent.CompletableFuture)1 ThreadLocalRandom (java.util.concurrent.ThreadLocalRandom)1 TimeUnit (java.util.concurrent.TimeUnit)1 Level (org.apache.log4j.Level)1 BaseTest (org.apache.ratis.BaseTest)1 RaftTestUtil (org.apache.ratis.RaftTestUtil)1 RaftTestUtil.waitForLeader (org.apache.ratis.RaftTestUtil.waitForLeader)1 RaftClient (org.apache.ratis.client.RaftClient)1 RaftProperties (org.apache.ratis.conf.RaftProperties)1 RatisMetricRegistry (org.apache.ratis.metrics.RatisMetricRegistry)1 RaftClientReply (org.apache.ratis.protocol.RaftClientReply)1 RaftGroupId (org.apache.ratis.protocol.RaftGroupId)1 RaftGroupMemberId (org.apache.ratis.protocol.RaftGroupMemberId)1 RaftPeer (org.apache.ratis.protocol.RaftPeer)1 RaftPeerId (org.apache.ratis.protocol.RaftPeerId)1