accumulo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From GitBox <...@apache.org>
Subject [GitHub] [accumulo] keith-turner commented on a change in pull request #1391: Include additional details in FATE metrics reported.
Date Wed, 06 Nov 2019 14:52:22 GMT
keith-turner commented on a change in pull request #1391: Include additional details in FATE
metrics reported.
URL: https://github.com/apache/accumulo/pull/1391#discussion_r343135754
 
 

 ##########
 File path: server/master/src/main/java/org/apache/accumulo/master/metrics/fate/FateMetrics.java
 ##########
 @@ -16,61 +16,251 @@
  */
 package org.apache.accumulo.master.metrics.fate;
 
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicReference;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
 
+import org.apache.accumulo.core.Constants;
+import org.apache.accumulo.fate.AdminUtil;
+import org.apache.accumulo.fate.ReadOnlyTStore;
+import org.apache.accumulo.fate.ZooStore;
+import org.apache.accumulo.fate.zookeeper.IZooReaderWriter;
 import org.apache.accumulo.master.metrics.MasterMetrics;
 import org.apache.accumulo.server.ServerContext;
 import org.apache.hadoop.metrics2.lib.MetricsRegistry;
 import org.apache.hadoop.metrics2.lib.MutableGaugeLong;
+import org.apache.zookeeper.KeeperException;
+import org.apache.zookeeper.data.Stat;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class FateMetrics extends MasterMetrics {
 
+  private static final Logger log = LoggerFactory.getLogger(FateMetrics.class);
+
   // limit calls to update fate counters to guard against hammering zookeeper.
   private static final long DEFAULT_MIN_REFRESH_DELAY = TimeUnit.SECONDS.toMillis(10);
+  private long minimumRefreshDelay;
 
-  private volatile long minimumRefreshDelay;
-
-  private final ServerContext context;
+  private static final String FATE_TX_STATE_METRIC_PREFIX = "FateTxState_";
+  private static final String FATE_OP_TYPE_METRIC_PREFIX = "FateTxOpType_";
 
   private final MutableGaugeLong currentFateOps;
   private final MutableGaugeLong zkChildFateOpsTotal;
   private final MutableGaugeLong zkConnectionErrorsTotal;
 
-  private final AtomicReference<FateMetricValues> metricValues;
+  private final Map<String,MutableGaugeLong> fateTypeCounts = new TreeMap<>();
+  private final Map<String,MutableGaugeLong> fateOpCounts = new TreeMap<>();
 
+  /*
+   * lock should be used to guard read and write access to metricValues and the lastUpdate
+   * timestamp.
+   */
+  private final Lock metricsValuesLock = new ReentrantLock();
+  private FateMetricValues metricValues;
   private volatile long lastUpdate = 0;
 
+  private final IZooReaderWriter zooReaderWriter;
+  private final ReadOnlyTStore<FateMetrics> zooStore;
+  private final String fateRootPath;
+
   public FateMetrics(final ServerContext context, final long minimumRefreshDelay) {
     super("Fate", "Fate Metrics", "fate");
 
-    this.context = context;
+    zooReaderWriter = context.getZooReaderWriter();
+    fateRootPath = context.getZooKeeperRoot() + Constants.ZFATE;
+
+    try {
+
+      zooStore = new ZooStore<>(fateRootPath, zooReaderWriter);
+
+    } catch (KeeperException ex) {
+      throw new IllegalStateException(
+          "FATE Metrics - Failed to create zoo store - metrics unavailable", ex);
+    } catch (InterruptedException ex) {
+      Thread.currentThread().interrupt();
+      throw new IllegalStateException(
+          "FATE Metrics - Interrupt received while initializing zoo store");
+    }
 
     this.minimumRefreshDelay = Math.max(DEFAULT_MIN_REFRESH_DELAY, minimumRefreshDelay);
 
-    metricValues = new AtomicReference<>(FateMetricValues.updateFromZookeeper(context,
null));
+    metricsValuesLock.lock();
 
 Review comment:
   Locking in the constructor should only be needed if `this` escapes the constructor which
should be avoided.

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

Mime
View raw message