HADOOP-7266. Deprecate metrics v1. Contributed by Akira AJISAKA.

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -905,6 +905,8 @@ Release 2.8.0 - UNRELEASED
     HADOOP-9692. Improving log message when SequenceFile reader throws
     EOFException on zero-length file. (Zhe Zhang and Chu Tong via ozawa)
 
+    HADOOP-7266. Deprecate metrics v1. (Akira AJISAKA via ozawa)
+
   OPTIMIZATIONS
 
     HADOOP-11785. Reduce the number of listStatus operation in distcp

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/http/HttpServer2.java

@@ -541,7 +541,9 @@ private void setContextAttributes(Context context, Configuration conf) {
 
   /**
    * Add default servlets.
+   * Note: /metrics servlet will be removed in 3.X release.
    */
+  @SuppressWarnings("deprecation")
   protected void addDefaultServlets() {
     // set up default servlets
     addServlet("stacks", "/stacks", StackServlet.class);

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/ContextFactory.java

@@ -36,7 +36,10 @@
 /**
  * Factory class for creating MetricsContext objects.  To obtain an instance
  * of this class, use the static <code>getFactory()</code> method.
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 @InterfaceStability.Evolving
 public class ContextFactory {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/MetricsContext.java

@@ -30,7 +30,10 @@
 
 /**
  * The main interface to the metrics package. 
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
 public interface MetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/MetricsException.java

@@ -25,7 +25,9 @@
 
 /**
  * General-purpose, unchecked metrics exception.
+ * @deprecated Use {@link org.apache.hadoop.metrics2.MetricsException} instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 @InterfaceStability.Evolving
 public class MetricsException extends RuntimeException {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/MetricsRecord.java

@@ -67,7 +67,10 @@
  * it is OK for different threads to call <code>update()</code> on MetricsRecord instances 
  * with the same set of tag names and tag values.  Different threads should 
  * <b>not</b> use the same MetricsRecord instance at the same time.
+ *
+ * @deprecated Use {@link org.apache.hadoop.metrics2.MetricsRecord} instead.
  */
+@Deprecated
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
 public interface MetricsRecord {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/MetricsServlet.java

@@ -43,7 +43,10 @@
  * A servlet to print out metrics data.  By default, the servlet returns a 
  * textual representation (no promises are made for parseability), and
  * users can use "?format=json" for parseable output.
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
 public class MetricsServlet extends HttpServlet {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/MetricsUtil.java

@@ -32,7 +32,9 @@
  * @see org.apache.hadoop.metrics.MetricsRecord
  * @see org.apache.hadoop.metrics.MetricsContext
  * @see org.apache.hadoop.metrics.ContextFactory
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 @InterfaceStability.Evolving
 public class MetricsUtil {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/Updater.java

@@ -25,7 +25,10 @@
 
 /**
  * Call-back interface.  See <code>MetricsContext.registerUpdater()</code>.
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 @InterfaceStability.Evolving
 public interface Updater {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/ganglia/GangliaContext.java

@@ -40,7 +40,10 @@
 /**
  * Context for sending metrics to Ganglia.
  *
+ * @deprecated Use {@link org.apache.hadoop.metrics2.sink.ganglia.GangliaSink30}
+ * instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class GangliaContext extends AbstractMetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/ganglia/GangliaContext31.java

@@ -35,7 +35,11 @@
  * Context for sending metrics to Ganglia version 3.1.x.
  * 
  * 3.1.1 has a slightly different wire portal compared to 3.0.x.
+ *
+ * @deprecated Use {@link org.apache.hadoop.metrics2.sink.ganglia.GangliaSink31}
+ * instead.
  */
+@Deprecated
 public class GangliaContext31 extends GangliaContext {
 
   String hostName = "UNKNOWN.example.com";

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/jvm/EventCounter.java

@@ -20,7 +20,10 @@
 /**
  * A log4J Appender that simply counts logging events in three levels:
  * fatal, error and warn.
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 public class EventCounter extends org.apache.hadoop.log.metrics.EventCounter {
 
   static {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/jvm/JvmMetrics.java

@@ -40,7 +40,10 @@
  * Singleton class which reports Java Virtual Machine metrics to the metrics API.  
  * Any application can create an instance of this class in order to emit
  * Java VM metrics.  
+ *
+ * @deprecated Use {@link org.apache.hadoop.metrics2.source.JvmMetrics} instead.
  */
+@Deprecated
 @InterfaceAudience.Private
 @InterfaceStability.Evolving
 public class JvmMetrics implements Updater {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/AbstractMetricsContext.java

@@ -51,7 +51,10 @@
  * on which data is to be sent to the metrics system.  Subclasses must
  * override the abstract <code>emitRecord</code> method in order to transmit
  * the data. <p/>
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public abstract class AbstractMetricsContext implements MetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/CompositeContext.java

@@ -34,6 +34,10 @@
 import org.apache.hadoop.metrics.MetricsUtil;
 import org.apache.hadoop.metrics.Updater;
 
+/**
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
+ */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class CompositeContext extends AbstractMetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/MetricValue.java

@@ -26,6 +26,7 @@
 /**
  * A Number that is either an absolute or an incremental amount.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class MetricValue {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/MetricsRecordImpl.java

@@ -33,7 +33,11 @@
  * An implementation of MetricsRecord.  Keeps a back-pointer to the context
  * from which it was created, and delegates back to it on <code>update</code>
  * and <code>remove()</code>.
+ *
+ * @deprecated Use {@link org.apache.hadoop.metrics2.impl.MetricsRecordImpl}
+ * instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class MetricsRecordImpl implements MetricsRecord {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/NoEmitMetricsContext.java

@@ -28,7 +28,10 @@
  * 
  * This is useful if you want to support {@link MetricsServlet}, but
  * not emit metrics in any other way.
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class NoEmitMetricsContext extends AbstractMetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/NullContext.java

@@ -27,7 +27,9 @@
  * default context, so that no performance data is emitted if no configuration
  * data is found.
  * 
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class NullContext extends AbstractMetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/NullContextWithUpdateThread.java

@@ -33,7 +33,9 @@
  * The default impl of start and stop monitoring:
  *  is the AbstractMetricsContext is good enough.
  * 
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class NullContextWithUpdateThread extends AbstractMetricsContext {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/OutputRecord.java

@@ -29,7 +29,10 @@
 
 /**
  * Represents a record of metric data to be sent to a metrics system.
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class OutputRecord {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/spi/Util.java

@@ -31,7 +31,10 @@
 
 /**
  * Static utility methods
+ *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Public
 @InterfaceStability.Evolving
 public class Util {

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MBeanUtil.java

@@ -33,7 +33,9 @@
  * our standard naming convention as described in the doc
  *  for {link {@link #registerMBean(String, String, Object)}
  *
+ * @deprecated Use {@link org.apache.hadoop.metrics2.util.MBeans} instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MBeanUtil {
 	

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsBase.java

@@ -24,7 +24,9 @@
  * 
  * This is base class for all metrics
  *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.Private
 public abstract class MetricsBase {
   public static final String NO_DESCRIPTION = "NoDescription";

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsDynamicMBeanBase.java

@@ -51,8 +51,9 @@
  *  ObjectName mbeanName = MBeanUtil.registerMBean("ServiceFoo",
  *                "TestStatistics", theMBean);
  * 
- *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public abstract class MetricsDynamicMBeanBase implements DynamicMBean {
   private final static String AVG_TIME = "AvgTime";

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsIntValue.java

@@ -28,7 +28,9 @@
  * Each time its value is set, it is published only *once* at the next update
  * call.
  *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MetricsIntValue extends MetricsBase {  
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsLongValue.java

@@ -27,7 +27,9 @@
  * Each time its value is set, it is published only *once* at the next update
  * call.
  *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MetricsLongValue extends MetricsBase{  
   private long value;

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsRegistry.java

@@ -28,7 +28,9 @@
  * Related set of metrics should be declared in a holding class and registered
  * in a registry for those metrics which is also stored in the the holding class.
  *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MetricsRegistry {
   private ConcurrentHashMap<String, MetricsBase> metricsList =

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsTimeVaryingInt.java

@@ -31,8 +31,9 @@
  * 
  * Note if one wants a time associated with the metric then use
  * @see org.apache.hadoop.metrics.util.MetricsTimeVaryingRate
- *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MetricsTimeVaryingInt extends MetricsBase {
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsTimeVaryingLong.java

@@ -32,8 +32,9 @@
  * 
  * Note if one wants a time associated with the metric then use
  * @see org.apache.hadoop.metrics.util.MetricsTimeVaryingRate
- *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MetricsTimeVaryingLong extends MetricsBase{
 

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics/util/MetricsTimeVaryingRate.java

@@ -30,7 +30,9 @@
  * This class also keeps track of the min and max rates along with 
  * a method to reset the min-max.
  *
+ * @deprecated Use org.apache.hadoop.metrics2 package instead.
  */
+@Deprecated
 @InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
 public class MetricsTimeVaryingRate extends MetricsBase {
 

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics/TestMetricsServlet.java

@@ -32,6 +32,7 @@
 import org.apache.hadoop.metrics.spi.OutputRecord;
 import org.mortbay.util.ajax.JSON;
 
+@Deprecated
 public class TestMetricsServlet extends TestCase {
   MetricsContext nc1;
   MetricsContext nc2;

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics/ganglia/TestGangliaContext.java

@@ -32,6 +32,7 @@
 
 import java.net.MulticastSocket;
 
+@Deprecated
 public class TestGangliaContext {
   @Test
   public void testShouldCreateDatagramSocketByDefault() throws Exception {

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/metrics/spi/TestOutputRecord.java

@@ -22,6 +22,7 @@
 
 import junit.framework.TestCase;
 
+@Deprecated
 public class TestOutputRecord extends TestCase {
   public void testCopy() {
     TagMap tags = new TagMap();