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commit 9434cf112e224b68dbfddc04f4ca5eafd0ce6298
Author: chenboat <[email protected]>
AuthorDate: Fri Aug 9 00:06:11 2019 -0700

    Use the system property value as the sliding window length. #382
---
 .../monitoring/mbeans/ClusterEventMonitor.java     |  5 ++++-
 .../monitoring/mbeans/HelixCallbackMonitor.java    |  5 ++++-
 .../apache/helix/monitoring/mbeans/JobMonitor.java | 26 +++++++++++++---------
 .../monitoring/mbeans/MessageLatencyMonitor.java   |  5 ++++-
 .../helix/monitoring/mbeans/ResourceMonitor.java   | 13 ++++++++---
 .../mbeans/RoutingTableProviderMonitor.java        | 11 ++++++---
 .../mbeans/StateTransitionStatMonitor.java         | 15 ++++++++-----
 .../monitoring/mbeans/ZkClientPathMonitor.java     | 25 +++++++++++++--------
 .../mbeans/dynamicMBeans/DynamicMBeanProvider.java |  1 +
 9 files changed, 73 insertions(+), 33 deletions(-)

diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ClusterEventMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ClusterEventMonitor.java
index 25b7894..06c29a8 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ClusterEventMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ClusterEventMonitor.java
@@ -26,6 +26,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 
 import javax.management.JMException;
 import java.util.ArrayList;
@@ -57,7 +58,9 @@ public class ClusterEventMonitor extends DynamicMBeanProvider 
{
     _clusterStatusMonitor = clusterStatusMonitor;
 
     _duration = new HistogramDynamicMetric("DurationGauge", new Histogram(
-        new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _count = new SimpleDynamicMetric("EventCounter", 0l);
     _maxDuration = new SimpleDynamicMetric("MaxSingleDurationGauge", 0l);
     _totalDuration = new SimpleDynamicMetric("TotalDurationCounter", 0l);
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/HelixCallbackMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/HelixCallbackMonitor.java
index 4c595da..f469609 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/HelixCallbackMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/HelixCallbackMonitor.java
@@ -27,6 +27,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 
 import javax.management.JMException;
 import java.util.ArrayList;
@@ -64,7 +65,9 @@ public class HelixCallbackMonitor extends 
DynamicMBeanProvider {
             changeType.name());
 
     _latencyGauge = new HistogramDynamicMetric("LatencyGauge", new Histogram(
-        new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _totalLatencyCounter = new SimpleDynamicMetric("LatencyCounter", 0l);
     _unbatchedCounter = new SimpleDynamicMetric("UnbatchedCounter", 0l);
     _counter = new SimpleDynamicMetric("Counter", 0l);
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/JobMonitor.java 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/JobMonitor.java
index 0c4aad4..68ebcd5 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/JobMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/JobMonitor.java
@@ -31,6 +31,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
 import org.apache.helix.task.TaskState;
+import org.apache.helix.util.HelixUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -85,16 +86,21 @@ public class JobMonitor extends DynamicMBeanProvider {
 
     // Instantiate histogram dynamic metrics
     _jobLatencyGauge = new HistogramDynamicMetric("JobLatencyGauge", new 
Histogram(
-        new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
-    _submissionToProcessDelayGauge =
-        new HistogramDynamicMetric("SubmissionToProcessDelayGauge", new 
Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
-    _submissionToScheduleDelayGauge =
-        new HistogramDynamicMetric("SubmissionToScheduleDelayGauge", new 
Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
-    _controllerInducedDelayGauge =
-        new HistogramDynamicMetric("ControllerInducedDelayGauge", new 
Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
+    _submissionToProcessDelayGauge = new 
HistogramDynamicMetric("SubmissionToProcessDelayGauge",
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
+    _submissionToScheduleDelayGauge = new 
HistogramDynamicMetric("SubmissionToScheduleDelayGauge",
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
+    _controllerInducedDelayGauge = new 
HistogramDynamicMetric("ControllerInducedDelayGauge",
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
   }
 
   @Override
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/MessageLatencyMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/MessageLatencyMonitor.java
index a496eab..81ca719 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/MessageLatencyMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/MessageLatencyMonitor.java
@@ -27,6 +27,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 
 import javax.management.JMException;
 import java.util.ArrayList;
@@ -49,7 +50,9 @@ public class MessageLatencyMonitor extends 
DynamicMBeanProvider {
         "MessageLatency");
 
     _messageLatencyGauge = new HistogramDynamicMetric("MessagelatencyGauge", 
new Histogram(
-        new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _totalMessageLatency = new SimpleDynamicMetric("TotalMessageLatency", 0l);
     _totalMessageCount = new SimpleDynamicMetric("TotalMessageCount", 0l);
   }
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ResourceMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ResourceMonitor.java
index c66ae2d..e32e012 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ResourceMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ResourceMonitor.java
@@ -38,6 +38,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 
 public class ResourceMonitor extends DynamicMBeanProvider {
 
@@ -140,14 +141,20 @@ public class ResourceMonitor extends DynamicMBeanProvider 
{
 
     _partitionTopStateHandoffDurationGauge =
         new HistogramDynamicMetric("PartitionTopStateHandoffDurationGauge", 
new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+            new SlidingTimeWindowArrayReservoir(HelixUtil
+                .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY,
+                    DEFAULT_RESET_INTERVAL_MS), TimeUnit.MILLISECONDS)));
 
     _partitionTopStateHandoffHelixLatencyGauge =
         new 
HistogramDynamicMetric("PartitionTopStateHandoffHelixLatencyGauge", new 
Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+            new SlidingTimeWindowArrayReservoir(HelixUtil
+                .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY,
+                    DEFAULT_RESET_INTERVAL_MS), TimeUnit.MILLISECONDS)));
     _partitionTopStateNonGracefulHandoffDurationGauge =
         new HistogramDynamicMetric("PartitionTopStateNonGracefulHandoffGauge", 
new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+            new SlidingTimeWindowArrayReservoir(HelixUtil
+                .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY,
+                    DEFAULT_RESET_INTERVAL_MS), TimeUnit.MILLISECONDS)));
 
     _totalMessageReceived = new SimpleDynamicMetric("TotalMessageReceived", 
0L);
     _maxSinglePartitionTopStateHandoffDuration =
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/RoutingTableProviderMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/RoutingTableProviderMonitor.java
index 325ea1b..ef4c90e 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/RoutingTableProviderMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/RoutingTableProviderMonitor.java
@@ -26,6 +26,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 
 import javax.management.JMException;
 import javax.management.MalformedObjectNameException;
@@ -60,13 +61,17 @@ public class RoutingTableProviderMonitor extends 
DynamicMBeanProvider {
             _propertyType.name());
 
     _dataRefreshLatencyGauge = new 
HistogramDynamicMetric("DataRefreshLatencyGauge", new Histogram(
-        new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _callbackCounter = new SimpleDynamicMetric("CallbackCounter", 0l);
     _eventQueueSizeGauge = new SimpleDynamicMetric("EventQueueSizeGauge", 0l);
     _dataRefreshCounter = new SimpleDynamicMetric("DataRefreshCounter", 0l);
     if (propertyType.equals(PropertyType.CURRENTSTATES)) {
-      _statePropLatencyGauge = new 
HistogramDynamicMetric("StatePropagationLatencyGauge", new Histogram(
-          new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+      _statePropLatencyGauge = new 
HistogramDynamicMetric("StatePropagationLatencyGauge",
+          new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+              .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY,
+                  DEFAULT_RESET_INTERVAL_MS), TimeUnit.MILLISECONDS)));
     }
   }
 
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/StateTransitionStatMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/StateTransitionStatMonitor.java
index 93ace95..2473378 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/StateTransitionStatMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/StateTransitionStatMonitor.java
@@ -34,6 +34,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -64,13 +65,17 @@ public class StateTransitionStatMonitor extends 
DynamicMBeanProvider {
     _totalSuccessTransitionCounter = new 
SimpleDynamicMetric<>("TotalSuccessTransitionCounter", 0L);
 
     _transitionLatencyGauge = new 
HistogramDynamicMetric("TransitionLatencyGauge", new Histogram(
-        new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _transitionExecutionLatencyGauge = new 
HistogramDynamicMetric("TransitionExecutionLatencyGauge",
-        new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _transitionMessageLatency = new 
HistogramDynamicMetric("TransitionMessageLatencyGauge",
-        new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
   }
 
   @Override
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ZkClientPathMonitor.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ZkClientPathMonitor.java
index 6cd0cd5..869aa88 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ZkClientPathMonitor.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/ZkClientPathMonitor.java
@@ -31,6 +31,7 @@ import 
org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMBeanProvider;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.DynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.HistogramDynamicMetric;
 import org.apache.helix.monitoring.mbeans.dynamicMBeans.SimpleDynamicMetric;
+import org.apache.helix.util.HelixUtil;
 
 public class ZkClientPathMonitor extends DynamicMBeanProvider {
   public static final String MONITOR_PATH = "PATH";
@@ -128,21 +129,27 @@ public class ZkClientPathMonitor extends 
DynamicMBeanProvider {
     _readCounter = new 
SimpleDynamicMetric(PredefinedMetricDomains.ReadCounter.name(), 0l);
 
     _readLatencyGauge = new 
HistogramDynamicMetric(PredefinedMetricDomains.ReadLatencyGauge.name(),
-        new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _writeLatencyGauge =
         new 
HistogramDynamicMetric(PredefinedMetricDomains.WriteLatencyGauge.name(), new 
Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+            new SlidingTimeWindowArrayReservoir(HelixUtil
+                .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY,
+                    DEFAULT_RESET_INTERVAL_MS), TimeUnit.MILLISECONDS)));
     _readBytesGauge = new 
HistogramDynamicMetric(PredefinedMetricDomains.ReadBytesGauge.name(),
-        new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _writeBytesGauge = new 
HistogramDynamicMetric(PredefinedMetricDomains.WriteBytesGauge.name(),
-        new Histogram(
-            new SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS, 
TimeUnit.MILLISECONDS)));
+        new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+            .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY, 
DEFAULT_RESET_INTERVAL_MS),
+            TimeUnit.MILLISECONDS)));
     _dataPropagationLatencyGauge =
         new 
HistogramDynamicMetric(PredefinedMetricDomains.DataPropagationLatencyGuage.name(),
-            new Histogram(new 
SlidingTimeWindowArrayReservoir(DEFAULT_RESET_INTERVAL_MS,
-                TimeUnit.MILLISECONDS)));
+            new Histogram(new SlidingTimeWindowArrayReservoir(HelixUtil
+                .getSystemPropertyAsLong(RESET_INTERVAL_SYSTEM_PROPERTY_KEY,
+                    DEFAULT_RESET_INTERVAL_MS), TimeUnit.MILLISECONDS)));
   }
 
   public ZkClientPathMonitor register() throws JMException {
diff --git 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/dynamicMBeans/DynamicMBeanProvider.java
 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/dynamicMBeans/DynamicMBeanProvider.java
index 6277c49..d371571 100644
--- 
a/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/dynamicMBeans/DynamicMBeanProvider.java
+++ 
b/helix-core/src/main/java/org/apache/helix/monitoring/mbeans/dynamicMBeans/DynamicMBeanProvider.java
@@ -51,6 +51,7 @@ import org.slf4j.LoggerFactory;
 public abstract class DynamicMBeanProvider implements DynamicMBean, 
SensorNameProvider {
   protected final Logger _logger = LoggerFactory.getLogger(getClass());
   protected static final long DEFAULT_RESET_INTERVAL_MS = 60 * 60 * 1000; // 
Reset time every hour
+  protected static final String RESET_INTERVAL_SYSTEM_PROPERTY_KEY = 
"reservoir.length.ms";
   private static String SENSOR_NAME_TAG = "SensorName";
   private static String DEFAULT_DESCRIPTION =
       "Information on the management interface of the MBean";

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