Examples with RaftServerMetricsImpl org.apache.ratis.server.metrics.RaftServerMetricsImpl used on opensource projects

Example 1 with RaftServerMetricsImpl

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

the class RaftSnapshotBaseTest method verifyInstallSnapshotMetric.

protected void verifyInstallSnapshotMetric(RaftServer.Division leader) {
    final Counter installSnapshotCounter = ((RaftServerMetricsImpl) leader.getRaftServerMetrics()).getCounter(RATIS_SERVER_INSTALL_SNAPSHOT_COUNT);
    Assert.assertNotNull(installSnapshotCounter);
    Assert.assertTrue(installSnapshotCounter.getCount() >= 1);
}

Example 2 with RaftServerMetricsImpl

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

the class TestRaftServerSlownessDetection method testSlownessDetection.

@Test
public void testSlownessDetection() throws Exception {
    RaftServer.Division leaderServer = RaftTestUtil.waitForLeader(cluster);
    long slownessTimeout = RaftServerConfigKeys.Rpc.slownessTimeout(cluster.getProperties()).toIntExact(TimeUnit.MILLISECONDS);
    RaftServer.Division failedFollower = cluster.getFollowers().get(0);
    final RatisMetricRegistry ratisMetricRegistry = ((RaftServerMetricsImpl) leaderServer.getRaftServerMetrics()).getRegistry();
    SortedMap<String, Gauge> heartbeatElapsedTimeGauges = ratisMetricRegistry.getGauges((s, metric) -> s.contains("lastHeartbeatElapsedTime"));
    String followerId = failedFollower.getId().toString();
    Gauge metric = heartbeatElapsedTimeGauges.entrySet().parallelStream().filter(e -> e.getKey().contains(followerId)).iterator().next().getValue();
    long followerHeartBeatElapsedMetric = (long) metric.getValue();
    // fail the node and wait for the callback to be triggered
    cluster.killServer(failedFollower.getId());
    Thread.sleep(slownessTimeout * 2);
    long followerHeartBeatElapsedMetricNew = (long) metric.getValue();
    Assert.assertTrue(followerHeartBeatElapsedMetricNew > followerHeartBeatElapsedMetric);
    // Followers should not get any failed not notification
    for (RaftServer.Division followerServer : cluster.getFollowers()) {
        Assert.assertNull(SimpleStateMachine4Testing.get(followerServer).getSlownessInfo());
    }
    // the leader should get notification that the follower has failed now
    RaftProtos.RoleInfoProto roleInfoProto = SimpleStateMachine4Testing.get(cluster.getLeader()).getSlownessInfo();
    Assert.assertNotNull(roleInfoProto);
    List<RaftProtos.ServerRpcProto> followers = roleInfoProto.getLeaderInfo().getFollowerInfoList();
    // Assert that the node shutdown is lagging behind
    for (RaftProtos.ServerRpcProto serverProto : followers) {
        if (RaftPeerId.valueOf(serverProto.getId().getId()).equals(failedFollower.getId())) {
            Assert.assertTrue(serverProto.getLastRpcElapsedTimeMs() > slownessTimeout);
        }
    }
}

Example 3 with RaftServerMetricsImpl

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

the class TestRetryCacheMetrics method setUp.

@BeforeClass
public static void setUp() {
    RaftGroupId raftGroupId = RaftGroupId.randomId();
    RaftPeerId raftPeerId = RaftPeerId.valueOf("TestId");
    RaftGroupMemberId raftGroupMemberId = RaftGroupMemberId.valueOf(raftPeerId, raftGroupId);
    retryCache = new RetryCacheImpl(RaftServerConfigKeys.RetryCache.EXPIRY_TIME_DEFAULT, null);
    final RaftServerMetricsImpl raftServerMetrics = RaftServerMetricsImpl.computeIfAbsentRaftServerMetrics(raftGroupMemberId, () -> null, retryCache::getStatistics);
    ratisMetricRegistry = raftServerMetrics.getRegistry();
}

Example 4 with RaftServerMetricsImpl

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

the class LogAppenderTests method testFollowerHeartbeatMetric.

@Test
public void testFollowerHeartbeatMetric() throws IOException, InterruptedException {
    // Start a 3 node Ratis ring.
    final MiniRaftCluster cluster = newCluster(3);
    cluster.start();
    final RaftServer.Division leaderServer = waitForLeader(cluster);
    // Write 10 messages to leader.
    try (RaftClient client = cluster.createClient(leaderServer.getId())) {
        for (int i = 1; i <= 10; i++) {
            client.io().send(new RaftTestUtil.SimpleMessage("Msg to make leader ready " + i));
        }
    } catch (IOException e) {
        throw e;
    }
    final RatisMetricRegistry ratisMetricRegistry = ((RaftServerMetricsImpl) leaderServer.getRaftServerMetrics()).getRegistry();
    // Get all last_heartbeat_elapsed_time metric gauges. Should be equal to number of followers.
    SortedMap<String, Gauge> heartbeatElapsedTimeGauges = ratisMetricRegistry.getGauges((s, metric) -> s.contains("lastHeartbeatElapsedTime"));
    assertTrue(heartbeatElapsedTimeGauges.size() == 2);
    for (RaftServer.Division followerServer : cluster.getFollowers()) {
        String followerId = followerServer.getId().toString();
        Gauge metric = heartbeatElapsedTimeGauges.entrySet().parallelStream().filter(e -> e.getKey().contains(followerId)).iterator().next().getValue();
        // Metric for this follower exists.
        assertTrue(metric != null);
        // Metric in nanos > 0.
        assertTrue((long) metric.getValue() > 0);
        // Try to get Heartbeat metrics for follower.
        final RaftServerMetricsImpl followerMetrics = (RaftServerMetricsImpl) followerServer.getRaftServerMetrics();
        // Metric should not exist. It only exists in leader.
        assertTrue(followerMetrics.getRegistry().getGauges((s, m) -> s.contains("lastHeartbeatElapsedTime")).isEmpty());
        for (boolean heartbeat : new boolean[] { true, false }) {
            assertTrue(followerMetrics.getFollowerAppendEntryTimer(heartbeat).getMeanRate() > 0.0d);
            assertTrue(followerMetrics.getFollowerAppendEntryTimer(heartbeat).getCount() > 0L);
        }
    }
}

Example 5 with RaftServerMetricsImpl

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

the class TestRatisServerMetricsBase method runTestClientFailedRequest.

void runTestClientFailedRequest(CLUSTER cluster) throws InterruptedException, IOException, ExecutionException {
    final RaftServer.Division leaderImpl = RaftTestUtil.waitForLeader(cluster);
    ClientId clientId = ClientId.randomId();
    // StaleRead with Long.MAX_VALUE minIndex will fail.
    RaftClientRequest r = RaftClientRequest.newBuilder().setClientId(clientId).setLeaderId(leaderImpl.getId()).setGroupId(cluster.getGroupId()).setCallId(0).setMessage(Message.EMPTY).setType(RaftClientRequest.staleReadRequestType(Long.MAX_VALUE)).build();
    final CompletableFuture<RaftClientReply> f = leaderImpl.getRaftServer().submitClientRequestAsync(r);
    Assert.assertTrue(!f.get().isSuccess());
    assertEquals(1L, ((RaftServerMetricsImpl) leaderImpl.getRaftServerMetrics()).getCounter(RATIS_SERVER_FAILED_CLIENT_STALE_READ_COUNT).getCount());
}