Bug/sbp cancellation (#13474)

* change cancellation logic to fix disparity bw trackers and resource duress Signed-off-by: Kaushal Kumar <[email protected]> * add additional tests for searchBackpressureService and refactor code Signed-off-by: Kaushal Kumar <[email protected]> * add enumMap instead of list for tracking taskResourceUsageTrackets Signed-off-by: Kaushal Kumar <[email protected]> * add nodeNotInDuress test for nodeDuressTrackers class Signed-off-by: Kaushal Kumar <[email protected]> * address comments Signed-off-by: Kaushal Kumar <[email protected]> * add entry in CHANGELOG Signed-off-by: Kaushal Kumar <[email protected]> * address comments Signed-off-by: Kaushal Kumar <[email protected]> * address comments Signed-off-by: Kaushal Kumar <[email protected]> * remove wildcard import Signed-off-by: Kaushal Kumar <[email protected]> * streamline imports Signed-off-by: Kaushal Kumar <[email protected]> * address comments Signed-off-by: Kaushal Kumar <[email protected]> * add additional test case to test the circuit breaker for SBP logic Signed-off-by: Kaushal Kumar <[email protected]> * add missing javadoc to resourece type enum Signed-off-by: Kaushal Kumar <[email protected]> * add javadoc to a method Signed-off-by: Kaushal Kumar <[email protected]> * fix javadoc warnings Signed-off-by: Kaushal Kumar <[email protected]> * fix javadoc warnings Signed-off-by: Kaushal Kumar <[email protected]> --------- Signed-off-by: Kaushal Kumar <[email protected]> (cherry picked from commit bcccedb) Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
opensearch-project · Jun 21, 2024 · 405db06 · 405db06
1 parent 95cef6d
commit 405db06
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -30,6 +30,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Removed
 
 ### Fixed
+- Fix bug in SBP cancellation logic ([#13259](https://github.com/opensearch-project/OpenSearch/pull/13474))
 - Fix handling of Short and Byte data types in ScriptProcessor ingest pipeline ([#14379](https://github.com/opensearch-project/OpenSearch/issues/14379))
 - Switch to iterative version of WKT format parser ([#14086](https://github.com/opensearch-project/OpenSearch/pull/14086))
 - Fix the computed max shards of cluster to avoid int overflow ([#14155](https://github.com/opensearch-project/OpenSearch/pull/14155))

diff --git a/server/src/main/java/org/opensearch/search/ResourceType.java b/server/src/main/java/org/opensearch/search/ResourceType.java
@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * The OpenSearch Contributors require contributions made to
+ * this file be licensed under the Apache-2.0 license or a
+ * compatible open source license.
+ */
+
+package org.opensearch.search;
+
+/**
+ * Enum to hold the resource type
+ */
+public enum ResourceType {
+    CPU("cpu"),
+    JVM("jvm");
+
+    private final String name;
+
+    ResourceType(String name) {
+        this.name = name;
+    }
+
+    /**
+     * The string match here is case-sensitive
+     * @param s name matching the resource type name
+     * @return a {@link ResourceType}
+     */
+    public static ResourceType fromName(String s) {
+        for (ResourceType resourceType : values()) {
+            if (resourceType.getName().equals(s)) {
+                return resourceType;
+            }
+        }
+        throw new IllegalArgumentException("Unknown resource type: [" + s + "]");
+    }
+
+    private String getName() {
+        return name;
+    }
+}
diff --git a/server/src/main/java/org/opensearch/search/backpressure/SearchBackpressureService.java b/server/src/main/java/org/opensearch/search/backpressure/SearchBackpressureService.java
diff --git a/server/src/main/java/org/opensearch/search/backpressure/stats/SearchShardTaskStats.java b/server/src/main/java/org/opensearch/search/backpressure/stats/SearchShardTaskStats.java
@@ -17,8 +17,8 @@
 import org.opensearch.search.backpressure.trackers.CpuUsageTracker;
 import org.opensearch.search.backpressure.trackers.ElapsedTimeTracker;
 import org.opensearch.search.backpressure.trackers.HeapUsageTracker;
-import org.opensearch.search.backpressure.trackers.TaskResourceUsageTracker;
 import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackerType;
+import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackers.TaskResourceUsageTracker;
 
 import java.io.IOException;
 import java.util.Map;

diff --git a/server/src/main/java/org/opensearch/search/backpressure/stats/SearchTaskStats.java b/server/src/main/java/org/opensearch/search/backpressure/stats/SearchTaskStats.java
@@ -17,8 +17,8 @@
 import org.opensearch.search.backpressure.trackers.CpuUsageTracker;
 import org.opensearch.search.backpressure.trackers.ElapsedTimeTracker;
 import org.opensearch.search.backpressure.trackers.HeapUsageTracker;
-import org.opensearch.search.backpressure.trackers.TaskResourceUsageTracker;
 import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackerType;
+import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackers.TaskResourceUsageTracker;
 
 import java.io.IOException;
 import java.util.Map;

diff --git a/server/src/main/java/org/opensearch/search/backpressure/trackers/CpuUsageTracker.java b/server/src/main/java/org/opensearch/search/backpressure/trackers/CpuUsageTracker.java
@@ -12,6 +12,7 @@
 import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.core.common.io.stream.StreamOutput;
 import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackers.TaskResourceUsageTracker;
 import org.opensearch.tasks.Task;
 import org.opensearch.tasks.TaskCancellation;
 
@@ -34,35 +35,37 @@ public class CpuUsageTracker extends TaskResourceUsageTracker {
     private final LongSupplier thresholdSupplier;
 
     public CpuUsageTracker(LongSupplier thresholdSupplier) {
+        this(thresholdSupplier, (task) -> {
+            long usage = task.getTotalResourceStats().getCpuTimeInNanos();
+            long threshold = thresholdSupplier.getAsLong();
+
+            if (usage < threshold) {
+                return Optional.empty();
+            }
+
+            return Optional.of(
+                new TaskCancellation.Reason(
+                    "cpu usage exceeded ["
+                        + new TimeValue(usage, TimeUnit.NANOSECONDS)
+                        + " >= "
+                        + new TimeValue(threshold, TimeUnit.NANOSECONDS)
+                        + "]",
+                    1  // TODO: fine-tune the cancellation score/weight
+                )
+            );
+        });
+    }
+
+    public CpuUsageTracker(LongSupplier thresholdSupplier, ResourceUsageBreachEvaluator resourceUsageBreachEvaluator) {
         this.thresholdSupplier = thresholdSupplier;
+        this.resourceUsageBreachEvaluator = resourceUsageBreachEvaluator;
     }
 
     @Override
     public String name() {
         return CPU_USAGE_TRACKER.getName();
     }
 
-    @Override
-    public Optional<TaskCancellation.Reason> checkAndMaybeGetCancellationReason(Task task) {
-        long usage = task.getTotalResourceStats().getCpuTimeInNanos();
-        long threshold = thresholdSupplier.getAsLong();
-
-        if (usage < threshold) {
-            return Optional.empty();
-        }
-
-        return Optional.of(
-            new TaskCancellation.Reason(
-                "cpu usage exceeded ["
-                    + new TimeValue(usage, TimeUnit.NANOSECONDS)
-                    + " >= "
-                    + new TimeValue(threshold, TimeUnit.NANOSECONDS)
-                    + "]",
-                1  // TODO: fine-tune the cancellation score/weight
-            )
-        );
-    }
-
     @Override
     public TaskResourceUsageTracker.Stats stats(List<? extends Task> activeTasks) {
         long currentMax = activeTasks.stream().mapToLong(t -> t.getTotalResourceStats().getCpuTimeInNanos()).max().orElse(0);

diff --git a/server/src/main/java/org/opensearch/search/backpressure/trackers/ElapsedTimeTracker.java b/server/src/main/java/org/opensearch/search/backpressure/trackers/ElapsedTimeTracker.java
@@ -12,6 +12,7 @@
 import org.opensearch.core.common.io.stream.StreamInput;
 import org.opensearch.core.common.io.stream.StreamOutput;
 import org.opensearch.core.xcontent.XContentBuilder;
+import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackers.TaskResourceUsageTracker;
 import org.opensearch.tasks.Task;
 import org.opensearch.tasks.TaskCancellation;
 
@@ -34,36 +35,42 @@ public class ElapsedTimeTracker extends TaskResourceUsageTracker {
     private final LongSupplier timeNanosSupplier;
 
     public ElapsedTimeTracker(LongSupplier thresholdSupplier, LongSupplier timeNanosSupplier) {
+        this(thresholdSupplier, timeNanosSupplier, (Task task) -> {
+            long usage = timeNanosSupplier.getAsLong() - task.getStartTimeNanos();
+            long threshold = thresholdSupplier.getAsLong();
+
+            if (usage < threshold) {
+                return Optional.empty();
+            }
+
+            return Optional.of(
+                new TaskCancellation.Reason(
+                    "elapsed time exceeded ["
+                        + new TimeValue(usage, TimeUnit.NANOSECONDS)
+                        + " >= "
+                        + new TimeValue(threshold, TimeUnit.NANOSECONDS)
+                        + "]",
+                    1  // TODO: fine-tune the cancellation score/weight
+                )
+            );
+        });
+    }
+
+    public ElapsedTimeTracker(
+        LongSupplier thresholdSupplier,
+        LongSupplier timeNanosSupplier,
+        ResourceUsageBreachEvaluator resourceUsageBreachEvaluator
+    ) {
         this.thresholdSupplier = thresholdSupplier;
         this.timeNanosSupplier = timeNanosSupplier;
+        this.resourceUsageBreachEvaluator = resourceUsageBreachEvaluator;
     }
 
     @Override
     public String name() {
         return ELAPSED_TIME_TRACKER.getName();
     }
 
-    @Override
-    public Optional<TaskCancellation.Reason> checkAndMaybeGetCancellationReason(Task task) {
-        long usage = timeNanosSupplier.getAsLong() - task.getStartTimeNanos();
-        long threshold = thresholdSupplier.getAsLong();
-
-        if (usage < threshold) {
-            return Optional.empty();
-        }
-
-        return Optional.of(
-            new TaskCancellation.Reason(
-                "elapsed time exceeded ["
-                    + new TimeValue(usage, TimeUnit.NANOSECONDS)
-                    + " >= "
-                    + new TimeValue(threshold, TimeUnit.NANOSECONDS)
-                    + "]",
-                1  // TODO: fine-tune the cancellation score/weight
-            )
-        );
-    }
-
     @Override
     public TaskResourceUsageTracker.Stats stats(List<? extends Task> activeTasks) {
         long now = timeNanosSupplier.getAsLong();

diff --git a/server/src/main/java/org/opensearch/search/backpressure/trackers/HeapUsageTracker.java b/server/src/main/java/org/opensearch/search/backpressure/trackers/HeapUsageTracker.java
@@ -18,6 +18,7 @@
 import org.opensearch.core.common.unit.ByteSizeValue;
 import org.opensearch.core.xcontent.XContentBuilder;
 import org.opensearch.monitor.jvm.JvmStats;
+import org.opensearch.search.backpressure.trackers.TaskResourceUsageTrackers.TaskResourceUsageTracker;
 import org.opensearch.tasks.CancellableTask;
 import org.opensearch.tasks.Task;
 import org.opensearch.tasks.TaskCancellation;
@@ -55,6 +56,43 @@ public HeapUsageTracker(
         this.heapPercentThresholdSupplier = heapPercentThresholdSupplier;
         this.movingAverageReference = new AtomicReference<>(new MovingAverage(heapMovingAverageWindowSize));
         clusterSettings.addSettingsUpdateConsumer(windowSizeSetting, this::updateWindowSize);
+        setDefaultResourceUsageBreachEvaluator();
+    }
+
+    /**
+     * Had to refactor this method out of the constructor as we can't pass a lambda which references a member variable in constructor
+     * error: cannot reference movingAverageReference before supertype constructor has been called
+     */
+    private void setDefaultResourceUsageBreachEvaluator() {
+        this.resourceUsageBreachEvaluator = (task) -> {
+            MovingAverage movingAverage = movingAverageReference.get();
+
+            // There haven't been enough measurements.
+            if (movingAverage.isReady() == false) {
+                return Optional.empty();
+            }
+
+            double currentUsage = task.getTotalResourceStats().getMemoryInBytes();
+            double averageUsage = movingAverage.getAverage();
+            double variance = heapVarianceSupplier.getAsDouble();
+            double allowedUsage = averageUsage * variance;
+            double threshold = heapPercentThresholdSupplier.getAsDouble() * HEAP_SIZE_BYTES;
+
+            if (isHeapTrackingSupported() == false || currentUsage < threshold || currentUsage < allowedUsage) {
+                return Optional.empty();
+            }
+
+            return Optional.of(
+                new TaskCancellation.Reason(
+                    "heap usage exceeded ["
+                        + new ByteSizeValue((long) currentUsage)
+                        + " >= "
+                        + new ByteSizeValue((long) allowedUsage)
+                        + "]",
+                    (int) (currentUsage / averageUsage)  // TODO: fine-tune the cancellation score/weight
+                )
+            );
+        };
     }
 
     @Override
@@ -67,33 +105,6 @@ public void update(Task task) {
         movingAverageReference.get().record(task.getTotalResourceStats().getMemoryInBytes());
     }
 
-    @Override
-    public Optional<TaskCancellation.Reason> checkAndMaybeGetCancellationReason(Task task) {
-        MovingAverage movingAverage = movingAverageReference.get();
-
-        // There haven't been enough measurements.
-        if (movingAverage.isReady() == false) {
-            return Optional.empty();
-        }
-
-        double currentUsage = task.getTotalResourceStats().getMemoryInBytes();
-        double averageUsage = movingAverage.getAverage();
-        double variance = heapVarianceSupplier.getAsDouble();
-        double allowedUsage = averageUsage * variance;
-        double threshold = heapPercentThresholdSupplier.getAsDouble() * HEAP_SIZE_BYTES;
-
-        if (isHeapTrackingSupported() == false || currentUsage < threshold || currentUsage < allowedUsage) {
-            return Optional.empty();
-        }
-
-        return Optional.of(
-            new TaskCancellation.Reason(
-                "heap usage exceeded [" + new ByteSizeValue((long) currentUsage) + " >= " + new ByteSizeValue((long) allowedUsage) + "]",
-                (int) (currentUsage / averageUsage)  // TODO: fine-tune the cancellation score/weight
-            )
-        );
-    }
-
     private void updateWindowSize(int heapMovingAverageWindowSize) {
         this.movingAverageReference.set(new MovingAverage(heapMovingAverageWindowSize));
     }

diff --git a/server/src/main/java/org/opensearch/search/backpressure/trackers/NodeDuressTracker.java b/server/src/main/java/org/opensearch/search/backpressure/trackers/NodeDuressTracker.java