HDFS-9067. o.a.h.hdfs.server.datanode.fsdataset.impl.TestLazyWriter is failing in trunk (Contributed by Surendra Singh Lilhore)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsConfig.java

@@ -58,6 +58,9 @@ class MetricsConfig extends SubsetConfiguration {
   static final String PERIOD_KEY = "period";
   static final int PERIOD_DEFAULT = 10; // seconds
 
+  // For testing, this will have the priority.
+  static final String PERIOD_MILLIS_KEY = "periodMillis";
+
   static final String QUEUE_CAPACITY_KEY = "queue.capacity";
   static final int QUEUE_CAPACITY_DEFAULT = 1;
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsSystemImpl.java

@@ -105,7 +105,7 @@ enum InitMode { NORMAL, STANDBY }
   private Map<String, MetricsConfig> sourceConfigs, sinkConfigs;
   private boolean monitoring = false;
   private Timer timer;
-  private int period; // seconds
+  private long period; // milliseconds
   private long logicalTime; // number of timer invocations * period
   private ObjectName mbeanName;
   private boolean publishSelfMetrics = true;
@@ -262,7 +262,7 @@ void registerSource(String name, String desc, MetricsSource source) {
     checkNotNull(config, "config");
     MetricsConfig conf = sourceConfigs.get(name);
     MetricsSourceAdapter sa = new MetricsSourceAdapter(prefix, name, desc,
-        source, injectedTags, period * 1000L, conf != null ? conf
+        source, injectedTags, period, conf != null ? conf
             : config.subset(SOURCE_KEY));
     sources.put(name, sa);
     sa.start();
@@ -359,7 +359,7 @@ private synchronized void startTimer() {
       return;
     }
     logicalTime = 0;
-    long millis = period * 1000L;
+    long millis = period;
     timer = new Timer("Timer for '"+ prefix +"' metrics system", true);
     timer.scheduleAtFixedRate(new TimerTask() {
           @Override
@@ -371,7 +371,7 @@ public void run() {
             }
           }
         }, millis, millis);
-    LOG.info("Scheduled snapshot period at "+ period +" second(s).");
+    LOG.info("Scheduled snapshot period at "+ (period/1000) +" second(s).");
   }
 
   synchronized void onTimerEvent() {
@@ -485,12 +485,15 @@ private synchronized void configureSystem() {
 
   private synchronized void configureSinks() {
     sinkConfigs = config.getInstanceConfigs(SINK_KEY);
-    int confPeriod = 0;
+    long confPeriodMillis = 0;
     for (Entry<String, MetricsConfig> entry : sinkConfigs.entrySet()) {
       MetricsConfig conf = entry.getValue();
       int sinkPeriod = conf.getInt(PERIOD_KEY, PERIOD_DEFAULT);
-      confPeriod = confPeriod == 0 ? sinkPeriod
+      // Support configuring periodMillis for testing.
-                                   : ArithmeticUtils.gcd(confPeriod, sinkPeriod);
+      long sinkPeriodMillis =
+          conf.getLong(PERIOD_MILLIS_KEY, sinkPeriod * 1000);
+      confPeriodMillis = confPeriodMillis == 0 ? sinkPeriodMillis
+          : ArithmeticUtils.gcd(confPeriodMillis, sinkPeriodMillis);
       String clsName = conf.getClassName("");
       if (clsName == null) continue;  // sink can be registered later on
       String sinkName = entry.getKey();
@@ -503,8 +506,9 @@ private synchronized void configureSinks() {
         LOG.warn("Error creating sink '"+ sinkName +"'", e);
       }
     }
-    period = confPeriod > 0 ? confPeriod
+    long periodSec = config.getInt(PERIOD_KEY, PERIOD_DEFAULT);
-                            : config.getInt(PERIOD_KEY, PERIOD_DEFAULT);
+    period = confPeriodMillis > 0 ? confPeriodMillis
+        : config.getLong(PERIOD_MILLIS_KEY, periodSec * 1000);
   }
 
   static MetricsSinkAdapter newSink(String name, String desc, MetricsSink sink,
@@ -550,7 +554,7 @@ static String getHostname() {
   private void registerSystemSource() {
     MetricsConfig sysConf = sourceConfigs.get(MS_NAME);
     sysSource = new MetricsSourceAdapter(prefix, MS_STATS_NAME, MS_STATS_DESC,
-        MetricsAnnotations.makeSource(this), injectedTags, period * 1000L,
+        MetricsAnnotations.makeSource(this), injectedTags, period,
         sysConf == null ? config.subset(SOURCE_KEY) : sysConf);
     sysSource.start();
   }

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -1338,6 +1338,9 @@ Release 2.8.0 - UNRELEASED
     HDFS-9069. TestNameNodeMetricsLogger failing -port in use.
     (stevel)
 
+    HDFS-9067. o.a.h.hdfs.server.datanode.fsdataset.impl.TestLazyWriter
+    is failing in trunk (Surendra Singh Lilhore via vinayakumarb)
+
 Release 2.7.2 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/DFSTestUtil.java

@@ -68,6 +68,7 @@
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang.UnhandledException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
@@ -133,6 +134,7 @@
 import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
 import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol;
 import org.apache.hadoop.hdfs.tools.DFSAdmin;
+import org.apache.hadoop.hdfs.tools.JMXGet;
 import org.apache.hadoop.io.IOUtils;
 import org.apache.hadoop.io.nativeio.NativeIO;
 import org.apache.hadoop.net.NetUtils;
@@ -1856,4 +1858,21 @@ public static void fillExpectedBuf(LocatedBlocks lbs, byte[] expected) {
     }
   }
 
+  public static void waitForMetric(final JMXGet jmx, final String metricName, final int expectedValue)
+      throws TimeoutException, InterruptedException {
+    GenericTestUtils.waitFor(new Supplier<Boolean>() {
+      @Override
+      public Boolean get() {
+        try {
+          final int currentValue = Integer.parseInt(jmx.getValue(metricName));
+          LOG.info("Waiting for " + metricName +
+                       " to reach value " + expectedValue +
+                       ", current value = " + currentValue);
+          return currentValue == expectedValue;
+        } catch (Exception e) {
+          throw new UnhandledException("Test failed due to unexpected exception", e);
+        }
+      }
+    }, 1000, Integer.MAX_VALUE);
+  }
 }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/LazyPersistTestCase.java

@@ -510,20 +510,7 @@ private void printRamDiskJMXMetrics() {
 
   protected void waitForMetric(final String metricName, final int expectedValue)
       throws TimeoutException, InterruptedException {
-    GenericTestUtils.waitFor(new Supplier<Boolean>() {
+    DFSTestUtil.waitForMetric(jmx, metricName, expectedValue);
-      @Override
-      public Boolean get() {
-        try {
-          final int currentValue = Integer.parseInt(jmx.getValue(metricName));
-          LOG.info("Waiting for " + metricName +
-                       " to reach value " + expectedValue +
-                       ", current value = " + currentValue);
-          return currentValue == expectedValue;
-        } catch (Exception e) {
-          throw new UnhandledException("Test failed due to unexpected exception", e);
-        }
-      }
-    }, 1000, Integer.MAX_VALUE);
   }
 
   protected void triggerEviction(DataNode dn) {

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestLazyWriter.java

@@ -72,6 +72,7 @@ public void testSynchronousEviction() throws Exception {
     // for the previous one.
     Path path2 = new Path("/" + METHOD_NAME + ".02.dat");
     makeTestFile(path2, BLOCK_SIZE, true);
+    waitForMetric("RamDiskBlocksEvicted", 1);
     verifyRamDiskJMXMetric("RamDiskBlocksEvicted", 1);
     verifyRamDiskJMXMetric("RamDiskBlocksEvictedWithoutRead", 1);
   }

hadoop-hdfs-project/hadoop-hdfs/src/test/resources/hadoop-metrics2.properties

@@ -0,0 +1,85 @@
+#
+#   Licensed to the Apache Software Foundation (ASF) under one or more
+#   contributor license agreements.  See the NOTICE file distributed with
+#   this work for additional information regarding copyright ownership.
+#   The ASF licenses this file to You under the Apache License, Version 2.0
+#   (the "License"); you may not use this file except in compliance with
+#   the License.  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+#
+# syntax: [prefix].[source|sink].[instance].[options]
+# See javadoc of package-info.java for org.apache.hadoop.metrics2 for details
+
+*.sink.file.class=org.apache.hadoop.metrics2.sink.FileSink
+# default sampling period, in seconds
+*.period=10
+*.periodMillis=100
+
+# The namenode-metrics.out will contain metrics from all context
+#namenode.sink.file.filename=namenode-metrics.out
+# Specifying a special sampling period for namenode:
+#namenode.sink.*.period=8
+
+#datanode.sink.file.filename=datanode-metrics.out
+
+#resourcemanager.sink.file.filename=resourcemanager-metrics.out
+
+#nodemanager.sink.file.filename=nodemanager-metrics.out
+
+#mrappmaster.sink.file.filename=mrappmaster-metrics.out
+
+#jobhistoryserver.sink.file.filename=jobhistoryserver-metrics.out
+
+# the following example split metrics of different
+# context to different sinks (in this case files)
+#nodemanager.sink.file_jvm.class=org.apache.hadoop.metrics2.sink.FileSink
+#nodemanager.sink.file_jvm.context=jvm
+#nodemanager.sink.file_jvm.filename=nodemanager-jvm-metrics.out
+#nodemanager.sink.file_mapred.class=org.apache.hadoop.metrics2.sink.FileSink
+#nodemanager.sink.file_mapred.context=mapred
+#nodemanager.sink.file_mapred.filename=nodemanager-mapred-metrics.out
+
+#
+# Below are for sending metrics to Ganglia
+#
+# for Ganglia 3.0 support
+# *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink30
+#
+# for Ganglia 3.1 support
+# *.sink.ganglia.class=org.apache.hadoop.metrics2.sink.ganglia.GangliaSink31
+
+# *.sink.ganglia.period=10
+
+# default for supportsparse is false
+# *.sink.ganglia.supportsparse=true
+
+#*.sink.ganglia.slope=jvm.metrics.gcCount=zero,jvm.metrics.memHeapUsedM=both
+#*.sink.ganglia.dmax=jvm.metrics.threadsBlocked=70,jvm.metrics.memHeapUsedM=40
+
+# Tag values to use for the ganglia prefix. If not defined no tags are used.
+# If '*' all tags are used. If Specifying multiple tags separate them with
+# commas. Note that the last segment of the property name is the context name.
+#
+#*.sink.ganglia.tagsForPrefix.jvm=ProcesName
+#*.sink.ganglia.tagsForPrefix.dfs=
+#*.sink.ganglia.tagsForPrefix.rpc=
+#*.sink.ganglia.tagsForPrefix.mapred=
+
+#namenode.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649
+
+#datanode.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649
+
+#resourcemanager.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649
+
+#nodemanager.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649
+
+#mrappmaster.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649
+
+#jobhistoryserver.sink.ganglia.servers=yourgangliahost_1:8649,yourgangliahost_2:8649