HDDS-11376. Improve ReplicationSupervisor to record replication metrics

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/ec/reconstruction/ECReconstructionCoordinatorTask.java

@@ -46,6 +46,16 @@ public ECReconstructionCoordinatorTask(
     debugString = reconstructionCommandInfo.toString();
   }
 
+  @Override
+  public String getMetricName() {
+    return "ECReconstructions";
+  }
+
+  @Override
+  public String getMetricDescriptionSegment() {
+    return "EC reconstructions";
+  }
+
   @Override
   public void runTask() {
     // Implement the coordinator logic to handle a container group

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/replication/AbstractReplicationTask.java

@@ -70,6 +70,10 @@ protected AbstractReplicationTask(long containerID,
     this.term = term;
     queued = Instant.now(clock);
   }
+
+  protected abstract String getMetricName();
+
+  protected abstract String getMetricDescriptionSegment();
 
   public long getContainerId() {
     return containerId;

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/replication/ReplicationSupervisor.java

@@ -26,6 +26,7 @@
 import java.util.Objects;
 import java.util.OptionalLong;
 import java.util.Set;
+import java.util.Collections;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.PriorityBlockingQueue;
@@ -71,11 +72,17 @@ public final class ReplicationSupervisor {
   private final StateContext context;
   private final Clock clock;
 
-  private final AtomicLong requestCounter = new AtomicLong();
-  private final AtomicLong successCounter = new AtomicLong();
-  private final AtomicLong failureCounter = new AtomicLong();
-  private final AtomicLong timeoutCounter = new AtomicLong();
-  private final AtomicLong skippedCounter = new AtomicLong();
+  private final Map<String, AtomicLong> requestCounter = new ConcurrentHashMap<>();
+  private final Map<String, AtomicLong> successCounter = new ConcurrentHashMap<>();
+  private final Map<String, AtomicLong> failureCounter = new ConcurrentHashMap<>();
+  private final Map<String, AtomicLong> timeoutCounter = new ConcurrentHashMap<>();
+  private final Map<String, AtomicLong> skippedCounter = new ConcurrentHashMap<>();
+
+  private static final Map<String, String> METRICS_MAP;
+
+  static {
+    METRICS_MAP = new HashMap<>();
+  }
 
   /**
    * A set of container IDs that are currently being downloaded
@@ -188,6 +195,10 @@ public static Builder newBuilder() {
     return new Builder();
   }
 
+  public static Map<String, String> getMetricsMap() {
+    return Collections.unmodifiableMap(METRICS_MAP);
+  }
+
   private ReplicationSupervisor(StateContext context, ExecutorService executor,
       ReplicationConfig replicationConfig, DatanodeConfiguration datanodeConfig,
       Clock clock, IntConsumer executorThreadUpdater) {
@@ -221,6 +232,19 @@ public void addTask(AbstractReplicationTask task) {
       return;
     }
 
+    if (requestCounter.get(task.getMetricName()) == null) {
+      synchronized (this) {
+        if (requestCounter.get(task.getMetricName()) == null) {
+          requestCounter.put(task.getMetricName(), new AtomicLong(0));
+          successCounter.put(task.getMetricName(), new AtomicLong(0));
+          failureCounter.put(task.getMetricName(), new AtomicLong(0));
+          timeoutCounter.put(task.getMetricName(), new AtomicLong(0));
+          skippedCounter.put(task.getMetricName(), new AtomicLong(0));
+          METRICS_MAP.put(task.getMetricName(), task.getMetricDescriptionSegment());
+        }
+      }
+    }
+
     if (inFlight.add(task)) {
       if (task.getPriority() != ReplicationCommandPriority.LOW) {
         // Low priority tasks are not included in the replication queue sizes
@@ -330,14 +354,14 @@ public TaskRunner(AbstractReplicationTask task) {
     @Override
     public void run() {
       try {
-        requestCounter.incrementAndGet();
+        requestCounter.get(task.getMetricName()).incrementAndGet();
 
         final long now = clock.millis();
         final long deadline = task.getDeadline();
         if (deadline > 0 && now > deadline) {
           LOG.info("Ignoring {} since the deadline has passed ({} < {})",
               this, Instant.ofEpochMilli(deadline), Instant.ofEpochMilli(now));
-          timeoutCounter.incrementAndGet();
+          timeoutCounter.get(task.getMetricName()).incrementAndGet();
           return;
         }
 
@@ -364,18 +388,18 @@ public void run() {
         task.runTask();
         if (task.getStatus() == Status.FAILED) {
           LOG.warn("Failed {}", this);
-          failureCounter.incrementAndGet();
+          failureCounter.get(task.getMetricName()).incrementAndGet();
         } else if (task.getStatus() == Status.DONE) {
           LOG.info("Successful {}", this);
-          successCounter.incrementAndGet();
+          successCounter.get(task.getMetricName()).incrementAndGet();
         } else if (task.getStatus() == Status.SKIPPED) {
           LOG.info("Skipped {}", this);
-          skippedCounter.incrementAndGet();
+          skippedCounter.get(task.getMetricName()).incrementAndGet();
         }
       } catch (Exception e) {
         task.setStatus(Status.FAILED);
         LOG.warn("Failed {}", this, e);
-        failureCounter.incrementAndGet();
+        failureCounter.get(task.getMetricName()).incrementAndGet();
       } finally {
         inFlight.remove(task);
         decrementTaskCounter(task);
@@ -419,7 +443,12 @@ public boolean equals(Object o) {
   }
 
   public long getReplicationRequestCount() {
-    return requestCounter.get();
+    return getCount(requestCounter);
+  }
+
+  public long getReplicationRequestCount(String metricsName) {
+    AtomicLong counter = requestCounter.get(metricsName);
+    return counter != null ? counter.get() : 0;
   }
 
   public long getQueueSize() {
@@ -438,20 +467,48 @@ public long getMaxReplicationStreams() {
     }
   }
 
+  private long getCount(Map<String, AtomicLong> counter) {
+    long total = 0;
+    for (Map.Entry<String, AtomicLong> entry : counter.entrySet()) {
+      total += entry.getValue().get();
+    }
+    return total;
+  }
+
   public long getReplicationSuccessCount() {
-    return successCounter.get();
+    return getCount(successCounter);
+  }
+
+  public long getReplicationSuccessCount(String metricsName) {
+    AtomicLong counter = successCounter.get(metricsName);
+    return counter != null ? counter.get() : 0;
   }
 
   public long getReplicationFailureCount() {
-    return failureCounter.get();
+    return getCount(failureCounter);
+  }
+
+  public long getReplicationFailureCount(String metricsName) {
+    AtomicLong counter = failureCounter.get(metricsName);
+    return counter != null ? counter.get() : 0;
   }
 
   public long getReplicationTimeoutCount() {
-    return timeoutCounter.get();
+    return getCount(timeoutCounter);
+  }
+
+  public long getReplicationTimeoutCount(String metricsName) {
+    AtomicLong counter = timeoutCounter.get(metricsName);
+    return counter != null ? counter.get() : 0;
   }
 
   public long getReplicationSkippedCount() {
-    return skippedCounter.get();
+    return getCount(skippedCounter);
+  }
+
+  public long getReplicationSkippedCount(String metricsName) {
+    AtomicLong counter = skippedCounter.get(metricsName);
+    return counter != null ? counter.get() : 0;
   }
 
 }

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/replication/ReplicationSupervisorMetrics.java

@@ -71,16 +71,47 @@ public void getMetrics(MetricsCollector collector, boolean all) {
         .addGauge(Interns.info("numRequestedReplications",
             "Number of requested replications"),
             supervisor.getReplicationRequestCount())
+        .addGauge(Interns.info("numSuccessReplications",
+            "Number of successful replications"),
+            supervisor.getReplicationSuccessCount())
+        .addGauge(Interns.info("numFailureReplications",
+            "Number of failure replications"),
+            supervisor.getReplicationFailureCount())
         .addGauge(Interns.info("numTimeoutReplications",
             "Number of replication requests timed out before being processed"),
             supervisor.getReplicationTimeoutCount())
         .addGauge(Interns.info("numSkippedReplications",
             "Number of replication requests skipped as the container is "
-            + "already present"), supervisor.getReplicationSkippedCount())
+            + "already present"),
+            supervisor.getReplicationSkippedCount())
         .addGauge(Interns.info("maxReplicationStreams", "Maximum number of "
             + "concurrent replication tasks which can run simultaneously"),
             supervisor.getMaxReplicationStreams());
 
+    Map<String, String> metricsMap = ReplicationSupervisor.getMetricsMap();
+    if (!metricsMap.isEmpty()) {
+      metricsMap.forEach((metricsName, descriptionSegment) -> {
+        if (!metricsName.equals("")) {
+          builder.addGauge(Interns.info("numRequested" + metricsName,
+              "Number of requested " + descriptionSegment),
+                  supervisor.getReplicationRequestCount(metricsName))
+              .addGauge(Interns.info("numSuccess" + metricsName,
+                  "Number of successful " + descriptionSegment),
+                  supervisor.getReplicationSuccessCount(metricsName))
+              .addGauge(Interns.info("numFailure" + metricsName,
+                  "Number of failure " + descriptionSegment),
+                  supervisor.getReplicationFailureCount(metricsName))
+              .addGauge(Interns.info("numTimeout" + metricsName,
+                  "Number of " + descriptionSegment + " timed out before being processed"),
+                  supervisor.getReplicationTimeoutCount(metricsName))
+              .addGauge(Interns.info("numSkipped" + metricsName,
+                  "Number of " + descriptionSegment + " skipped as the container is "
+                  + "already present"),
+                  supervisor.getReplicationSkippedCount(metricsName));
+        }
+      });
+    }
+
     Map<String, Integer> tasks = supervisor.getInFlightReplicationSummary();
     for (Map.Entry<String, Integer> entry : tasks.entrySet()) {
       builder.addGauge(Interns.info("numInflight" + entry.getKey(),

hadoop-hdds/container-service/src/main/java/org/apache/hadoop/ozone/container/replication/ReplicationTask.java

@@ -65,6 +65,16 @@ protected ReplicationTask(
         replicator);
   }
 
+  @Override
+  public String getMetricName() {
+    return "ContainerReplications";
+  }
+
+  @Override
+  public String getMetricDescriptionSegment() {
+    return "container replications";
+  }
+
   @Override
   public boolean equals(Object o) {
     if (this == o) {