org.apache.hadoop.mapreduce.CounterGroup Java Exaples

Source File: JobCounterInfo.java From big-c with Apache License 2.0

6 votes

public JobCounterInfo(AppContext ctx, Job job) {
  getCounters(ctx, job);
  counterGroup = new ArrayList<CounterGroupInfo>();
  this.id = MRApps.toString(job.getID());

  if (total != null) {
    for (CounterGroup g : total) {
      if (g != null) {
        CounterGroup mg = map == null ? null : map.getGroup(g.getName());
        CounterGroup rg = reduce == null ? null : reduce
          .getGroup(g.getName());

        CounterGroupInfo cginfo = new CounterGroupInfo(g.getName(), g,
          mg, rg);
        counterGroup.add(cginfo);
      }
    }
  }
}

Source File: JoinPhaseJob.java From incubator-pinot with Apache License 2.0

6 votes

private void dumpSummary(Job job, List<String> sourceNames) throws IOException {
  System.out.println("Join Input Matrix.");
  CounterGroup group = job.getCounters().getGroup("DynamicCounter");
  for (String source : sourceNames) {
    System.out.print(String.format("%25s\t", source));
  }
  if (group != null) {
    Iterator<Counter> iterator = group.iterator();
    while (iterator.hasNext()) {
      Counter counter = iterator.next();
      String displayName = counter.getDisplayName();
      String[] split = displayName.replace("[", "").replace("[", "").split(",");
      for (String str : split) {
        if (str.trim().equals("1")) {
          System.out.print(String.format("%25s\t", "1"));
        } else {
          System.out.print(String.format("%25s\t", "-"));
        }
      }
    }
  }
}

Source File: BlurInputFormatTest.java From incubator-retired-blur with Apache License 2.0

6 votes

private void assertMapTask(int i, Counters counters) {
  for (CounterGroup counterGroup : counters) {
    String name = counterGroup.getName();
    boolean jobCounterGroup = false;
    if (name.equals("org.apache.hadoop.mapreduce.JobCounter")) {
      jobCounterGroup = true;
    } else if (name.equals("org.apache.hadoop.mapred.JobInProgress$Counter")) {
      jobCounterGroup = true;
    }
    if (jobCounterGroup) {
      for (Counter counter : counterGroup) {
        if (counter.getName().equals("TOTAL_LAUNCHED_MAPS")) {
          assertEquals(1, counter.getValue());
          return;
        }
      }
    }
  }
  fail();
}

Source File: MRJobLauncher.java From incubator-gobblin with Apache License 2.0

6 votes

/**
 * Create a {@link org.apache.gobblin.metrics.GobblinMetrics} instance for this job run from the Hadoop counters.
 */
@VisibleForTesting
void countersToMetrics(GobblinMetrics metrics) throws IOException {
  Optional<Counters> counters = Optional.fromNullable(this.job.getCounters());

  if (counters.isPresent()) {
    // Write job-level counters
    CounterGroup jobCounterGroup = counters.get().getGroup(MetricGroup.JOB.name());
    for (Counter jobCounter : jobCounterGroup) {
      metrics.getCounter(jobCounter.getName()).inc(jobCounter.getValue());
    }

    // Write task-level counters
    CounterGroup taskCounterGroup = counters.get().getGroup(MetricGroup.TASK.name());
    for (Counter taskCounter : taskCounterGroup) {
      metrics.getCounter(taskCounter.getName()).inc(taskCounter.getValue());
    }
  }
}

Source File: HadoopMapReduceCounters.java From ignite with Apache License 2.0

6 votes

/** {@inheritDoc} */
@Override public Iterator<CounterGroup> iterator() {
    final Iterator<String> iter = getGroupNames().iterator();

    return new Iterator<CounterGroup>() {
        @Override public boolean hasNext() {
            return iter.hasNext();
        }

        @Override public CounterGroup next() {
            if (!hasNext())
                throw new NoSuchElementException();

            return new HadoopMapReduceCounterGroup(HadoopMapReduceCounters.this, iter.next());
        }

        @Override public void remove() {
            throw new UnsupportedOperationException("not implemented");
        }
    };
}

Source File: EventWriter.java From big-c with Apache License 2.0

6 votes

static JhCounters toAvro(Counters counters, String name) {
  JhCounters result = new JhCounters();
  result.name = new Utf8(name);
  result.groups = new ArrayList<JhCounterGroup>(0);
  if (counters == null) return result;
  for (CounterGroup group : counters) {
    JhCounterGroup g = new JhCounterGroup();
    g.name = new Utf8(group.getName());
    g.displayName = new Utf8(group.getDisplayName());
    g.counts = new ArrayList<JhCounter>(group.size());
    for (Counter counter : group) {
      JhCounter c = new JhCounter();
      c.name = new Utf8(counter.getName());
      c.displayName = new Utf8(counter.getDisplayName());
      c.value = counter.getValue();
      g.counts.add(c);
    }
    result.groups.add(g);
  }
  return result;
}

Source File: JobHistoryEventHandler.java From big-c with Apache License 2.0

6 votes

@Private
public JsonNode countersToJSON(Counters counters) {
  ObjectMapper mapper = new ObjectMapper();
  ArrayNode nodes = mapper.createArrayNode();
  if (counters != null) {
    for (CounterGroup counterGroup : counters) {
      ObjectNode groupNode = nodes.addObject();
      groupNode.put("NAME", counterGroup.getName());
      groupNode.put("DISPLAY_NAME", counterGroup.getDisplayName());
      ArrayNode countersNode = groupNode.putArray("COUNTERS");
      for (Counter counter : counterGroup) {
        ObjectNode counterNode = countersNode.addObject();
        counterNode.put("NAME", counter.getName());
        counterNode.put("DISPLAY_NAME", counter.getDisplayName());
        counterNode.put("VALUE", counter.getValue());
      }
    }
  }
  return nodes;
}

Source File: JobTaskAttemptCounterInfo.java From big-c with Apache License 2.0

6 votes

public JobTaskAttemptCounterInfo(TaskAttempt taskattempt) {

    this.id = MRApps.toString(taskattempt.getID());
    total = taskattempt.getCounters();
    taskAttemptCounterGroup = new ArrayList<TaskCounterGroupInfo>();
    if (total != null) {
      for (CounterGroup g : total) {
        if (g != null) {
          TaskCounterGroupInfo cginfo = new TaskCounterGroupInfo(g.getName(), g);
          if (cginfo != null) {
            taskAttemptCounterGroup.add(cginfo);
          }
        }
      }
    }
  }

Source File: EventWriter.java From hadoop with Apache License 2.0

6 votes

static JhCounters toAvro(Counters counters, String name) {
  JhCounters result = new JhCounters();
  result.name = new Utf8(name);
  result.groups = new ArrayList<JhCounterGroup>(0);
  if (counters == null) return result;
  for (CounterGroup group : counters) {
    JhCounterGroup g = new JhCounterGroup();
    g.name = new Utf8(group.getName());
    g.displayName = new Utf8(group.getDisplayName());
    g.counts = new ArrayList<JhCounter>(group.size());
    for (Counter counter : group) {
      JhCounter c = new JhCounter();
      c.name = new Utf8(counter.getName());
      c.displayName = new Utf8(counter.getDisplayName());
      c.value = counter.getValue();
      g.counts.add(c);
    }
    result.groups.add(g);
  }
  return result;
}

Source File: JobHistoryEventHandler.java From hadoop with Apache License 2.0

6 votes

@Private
public JsonNode countersToJSON(Counters counters) {
  ObjectMapper mapper = new ObjectMapper();
  ArrayNode nodes = mapper.createArrayNode();
  if (counters != null) {
    for (CounterGroup counterGroup : counters) {
      ObjectNode groupNode = nodes.addObject();
      groupNode.put("NAME", counterGroup.getName());
      groupNode.put("DISPLAY_NAME", counterGroup.getDisplayName());
      ArrayNode countersNode = groupNode.putArray("COUNTERS");
      for (Counter counter : counterGroup) {
        ObjectNode counterNode = countersNode.addObject();
        counterNode.put("NAME", counter.getName());
        counterNode.put("DISPLAY_NAME", counter.getDisplayName());
        counterNode.put("VALUE", counter.getValue());
      }
    }
  }
  return nodes;
}

Source File: JobCounterInfo.java From hadoop with Apache License 2.0

6 votes

public JobCounterInfo(AppContext ctx, Job job) {
  getCounters(ctx, job);
  counterGroup = new ArrayList<CounterGroupInfo>();
  this.id = MRApps.toString(job.getID());

  if (total != null) {
    for (CounterGroup g : total) {
      if (g != null) {
        CounterGroup mg = map == null ? null : map.getGroup(g.getName());
        CounterGroup rg = reduce == null ? null : reduce
          .getGroup(g.getName());

        CounterGroupInfo cginfo = new CounterGroupInfo(g.getName(), g,
          mg, rg);
        counterGroup.add(cginfo);
      }
    }
  }
}

Source File: JobMetrics.java From circus-train with Apache License 2.0

6 votes

public JobMetrics(Job job, String bytesReplicatedKey) {
  Builder<String, Long> builder = ImmutableMap.builder();
  if (job != null) {
    Counters counters;
    try {
      counters = job.getCounters();
    } catch (IOException e) {
      throw new CircusTrainException("Unable to get counters from job.", e);
    }
    if (counters != null) {
      for (CounterGroup group : counters) {
        for (Counter counter : group) {
          builder.put(DotJoiner.join(group.getName(), counter.getName()), counter.getValue());
        }
      }
    }
  }
  metrics = builder.build();
  Long bytesReplicatedValue = metrics.get(bytesReplicatedKey);
  if (bytesReplicatedValue != null) {
    bytesReplicated = bytesReplicatedValue;
  } else {
    bytesReplicated = 0L;
  }
}

Source File: CounterDump.java From datawave with Apache License 2.0

6 votes

public String toString() {
    StringBuilder builder = new StringBuilder();
    
    while (source.hasNext()) {
        Entry<String,Counters> nextCntr = source.next();
        builder.append("\n").append(nextCntr.getKey()).append("\n----------------------\n");
        Counters counters = nextCntr.getValue();
        
        for (String groupName : counters.getGroupNames()) {
            
            CounterGroup group = counters.getGroup(groupName);
            Iterator<Counter> cntrItr = group.iterator();
            while (cntrItr.hasNext()) {
                Counter counter = cntrItr.next();
                builder.append(groupName).append("\t").append(counter.getDisplayName()).append("=").append(counter.getValue()).append("\n");
            }
            
        }
    }
    
    return builder.toString();
}

Source File: JsonCountersIterator.java From datawave with Apache License 2.0

6 votes

@Override
public JsonElement serialize(CounterGroup cg, Type t, JsonSerializationContext ctx) {
    JsonObject obj = new JsonObject();
    if (!cg.getName().equals(cg.getDisplayName()))
        obj.addProperty("displayName", cg.getDisplayName());
    JsonObject dns = new JsonObject();
    boolean anyNamesDiffer = false;
    for (Counter c : cg) {
        obj.addProperty(c.getName(), c.getValue());
        if (!c.getName().equals(c.getDisplayName()))
            anyNamesDiffer = true;
        dns.addProperty(c.getName(), c.getDisplayName());
    }
    if (anyNamesDiffer)
        obj.add("displayNames", dns);
    return obj;
}

Source File: JobTaskAttemptCounterInfo.java From hadoop with Apache License 2.0

6 votes

public JobTaskAttemptCounterInfo(TaskAttempt taskattempt) {

    this.id = MRApps.toString(taskattempt.getID());
    total = taskattempt.getCounters();
    taskAttemptCounterGroup = new ArrayList<TaskCounterGroupInfo>();
    if (total != null) {
      for (CounterGroup g : total) {
        if (g != null) {
          TaskCounterGroupInfo cginfo = new TaskCounterGroupInfo(g.getName(), g);
          if (cginfo != null) {
            taskAttemptCounterGroup.add(cginfo);
          }
        }
      }
    }
  }

Source File: TestJobHistoryEventHandler.java From big-c with Apache License 2.0

5 votes

@Test (timeout=50000)
public void testCountersToJSON() throws Exception {
  JobHistoryEventHandler jheh = new JobHistoryEventHandler(null, 0);
  Counters counters = new Counters();
  CounterGroup group1 = counters.addGroup("DOCTORS",
          "Incarnations of the Doctor");
  group1.addCounter("PETER_CAPALDI", "Peter Capaldi", 12);
  group1.addCounter("MATT_SMITH", "Matt Smith", 11);
  group1.addCounter("DAVID_TENNANT", "David Tennant", 10);
  CounterGroup group2 = counters.addGroup("COMPANIONS",
          "Companions of the Doctor");
  group2.addCounter("CLARA_OSWALD", "Clara Oswald", 6);
  group2.addCounter("RORY_WILLIAMS", "Rory Williams", 5);
  group2.addCounter("AMY_POND", "Amy Pond", 4);
  group2.addCounter("MARTHA_JONES", "Martha Jones", 3);
  group2.addCounter("DONNA_NOBLE", "Donna Noble", 2);
  group2.addCounter("ROSE_TYLER", "Rose Tyler", 1);
  JsonNode jsonNode = jheh.countersToJSON(counters);
  String jsonStr = new ObjectMapper().writeValueAsString(jsonNode);
  String expected = "[{\"NAME\":\"COMPANIONS\",\"DISPLAY_NAME\":\"Companions "
      + "of the Doctor\",\"COUNTERS\":[{\"NAME\":\"AMY_POND\",\"DISPLAY_NAME\""
      + ":\"Amy Pond\",\"VALUE\":4},{\"NAME\":\"CLARA_OSWALD\","
      + "\"DISPLAY_NAME\":\"Clara Oswald\",\"VALUE\":6},{\"NAME\":"
      + "\"DONNA_NOBLE\",\"DISPLAY_NAME\":\"Donna Noble\",\"VALUE\":2},"
      + "{\"NAME\":\"MARTHA_JONES\",\"DISPLAY_NAME\":\"Martha Jones\","
      + "\"VALUE\":3},{\"NAME\":\"RORY_WILLIAMS\",\"DISPLAY_NAME\":\"Rory "
      + "Williams\",\"VALUE\":5},{\"NAME\":\"ROSE_TYLER\",\"DISPLAY_NAME\":"
      + "\"Rose Tyler\",\"VALUE\":1}]},{\"NAME\":\"DOCTORS\",\"DISPLAY_NAME\""
      + ":\"Incarnations of the Doctor\",\"COUNTERS\":[{\"NAME\":"
      + "\"DAVID_TENNANT\",\"DISPLAY_NAME\":\"David Tennant\",\"VALUE\":10},"
      + "{\"NAME\":\"MATT_SMITH\",\"DISPLAY_NAME\":\"Matt Smith\",\"VALUE\":"
      + "11},{\"NAME\":\"PETER_CAPALDI\",\"DISPLAY_NAME\":\"Peter Capaldi\","
      + "\"VALUE\":12}]}]";
  Assert.assertEquals(expected, jsonStr);
}

Source File: IngestMetricsSummaryLoader.java From datawave with Apache License 2.0

5 votes

private static String checkForIngestLabelOverride(Counters ingestJobCounters) {
    CounterGroup jobQueueName = ingestJobCounters.getGroup(IngestProcess.METRICS_LABEL_OVERRIDE.name());
    if (jobQueueName.size() > 0) {
        Counter myCounter = jobQueueName.iterator().next();
        return myCounter.getName();
    }
    return null;
}

Source File: TestInputOutputFormat.java From parquet-mr with Apache License 2.0

5 votes

private static long value(Job job, String groupName, String name) throws Exception {
  // getGroup moved to AbstractCounters
  Method getGroup = org.apache.hadoop.mapreduce.Counters.class.getMethod("getGroup", String.class);
  // CounterGroup changed to an interface
  Method findCounter = org.apache.hadoop.mapreduce.CounterGroup.class.getMethod("findCounter", String.class);
  // Counter changed to an interface
  Method getValue = org.apache.hadoop.mapreduce.Counter.class.getMethod("getValue");
  CounterGroup group = (CounterGroup) getGroup.invoke(job.getCounters(), groupName);
  Counter counter = (Counter) findCounter.invoke(group, name);
  return (Long) getValue.invoke(counter);
}

Source File: JsonCountersIterator.java From datawave with Apache License 2.0

5 votes

private Gson initializeGson() {
    GsonBuilder builder = new GsonBuilder().registerTypeAdapter(Counters.class, new CountersJson()).registerTypeAdapter(CounterGroup.class,
                    new CounterGroupJson());
    if (prettyPrint)
        builder.setPrettyPrinting();
    return builder.create();
}

Source File: YarnJobStatsUtility.java From jumbune with GNU Lesser General Public License v3.0

5 votes

/**
 * Adds detail for a Map phase.
 * @param task2 
 *
 * @param task2 the tasks
 * @param referencedZeroTime 
 * @param referencedZeroTime the start time
 * @return the phase details
 */
private TaskOutputDetails addMapPhaseDetails(Entry<TaskAttemptID, TaskAttemptInfo> task, long referencedZeroTime) {
				
		TaskAttemptInfo taskAttemptInfo = (TaskAttemptInfo) (task.getValue());
		TaskOutputDetails taskOutputDetails = new TaskOutputDetails();
		if(taskAttemptInfo.getTaskStatus().equalsIgnoreCase("SUCCEEDED")){
		taskOutputDetails.setTaskStatus(taskAttemptInfo.getTaskStatus());
		taskOutputDetails.setTaskType(taskAttemptInfo.getTaskType().toString());
		taskOutputDetails.setTaskID(taskAttemptInfo.getAttemptId().getTaskID().toString());
		long startPoint = (taskAttemptInfo.getStartTime() - referencedZeroTime) / CONVERSION_FACTOR_MILLISECS_TO_SECS;
		taskOutputDetails.setStartPoint(startPoint);
		long endPoint = (taskAttemptInfo.getFinishTime() - referencedZeroTime) / CONVERSION_FACTOR_MILLISECS_TO_SECS;
		taskOutputDetails.setEndPoint(endPoint);
		taskOutputDetails.setTimeTaken(endPoint - startPoint);
		taskOutputDetails.setLocation(taskAttemptInfo.getHostname());
		Counters counters = taskAttemptInfo.getCounters();
		CounterGroup fileSystemCounters = counters.getGroup("org.apache.hadoop.mapreduce.FileSystemCounter");
		Counter inputBytes = fileSystemCounters.findCounter("HDFS_BYTES_READ");
		long dataFlowRate = inputBytes.getValue() / (endPoint - startPoint);
		taskOutputDetails.setDataFlowRate(dataFlowRate);
		CounterGroup mapReduceTaskCounters = counters.getGroup("org.apache.hadoop.mapreduce.TaskCounter");
		Counter mapOutputRecords = mapReduceTaskCounters.findCounter("MAP_OUTPUT_RECORDS");
		Counter physicalMemoryBytes = mapReduceTaskCounters.findCounter("PHYSICAL_MEMORY_BYTES");
		ResourceUsageMetrics rum = new ResourceUsageMetrics();
		rum.setPhysicalMemoryUsage(physicalMemoryBytes.getValue());
		taskOutputDetails.setResourceUsageMetrics(rum);
		taskOutputDetails.setOutputRecords(mapOutputRecords.getValue());
		Counter mapOutputBytes = mapReduceTaskCounters.findCounter("MAP_OUTPUT_BYTES");
		taskOutputDetails.setOutputBytes(mapOutputBytes.getValue());}
 		return taskOutputDetails;
}

Source File: HadoopMapReduceCounters.java From ignite with Apache License 2.0

5 votes

/** {@inheritDoc} */
@Override public synchronized void incrAllCounters(AbstractCounters<Counter, CounterGroup> other) {
    for (CounterGroup group : other) {
        for (Counter counter : group) {
            findCounter(group.getName(), counter.getName()).increment(counter.getValue());
        }
    }
}

Source File: JsonCountersIterator.java From datawave with Apache License 2.0

5 votes

@Override
public JsonElement serialize(org.apache.hadoop.mapreduce.Counters counters, Type type, JsonSerializationContext ctx) {
    JsonObject obj = new JsonObject();
    for (CounterGroup group : counters) {
        obj.add(group.getName(), ctx.serialize(group));
    }
    return obj;
}

Source File: MapReduceFSFetcherHadoop2.java From dr-elephant with Apache License 2.0

5 votes

private MapReduceCounterData getCounterData(Counters counters) {
  MapReduceCounterData holder = new MapReduceCounterData();
  if (counters != null) {
    for (CounterGroup group : counters) {
      String groupName = group.getName();
      for (Counter counter : group) {
        holder.set(groupName, counter.getName(), counter.getValue());
      }
    }
  }
  return holder;
}

Source File: EventReader.java From big-c with Apache License 2.0

5 votes

static Counters fromAvro(JhCounters counters) {
  Counters result = new Counters();
  if(counters != null) {
    for (JhCounterGroup g : counters.groups) {
      CounterGroup group =
          result.addGroup(StringInterner.weakIntern(g.name.toString()), 
              StringInterner.weakIntern(g.displayName.toString()));
      for (JhCounter c : g.counts) {
        group.addCounter(StringInterner.weakIntern(c.name.toString()), 
            StringInterner.weakIntern(c.displayName.toString()), c.value);
      }
    }
  }
  return result;
}

Source File: CounterStatsDClient.java From datawave with Apache License 2.0

5 votes

public void sendFinalStats(Counters counters) {
    if (client != null) {
        for (CounterGroup group : counters) {
            for (Counter counter : group) {
                if (log.isTraceEnabled()) {
                    log.trace("Looking for aspect matching " + group.getName() + " / " + counter.getName());
                }
                CounterToStatsDConfiguration.StatsDAspect aspect = config.getAspect(CounterToStatsDConfiguration.StatsDOutputType.FINAL, group, counter);
                if (aspect != null) {
                    String fullName = aspect.getFullName(counter.getName());
                    if (log.isTraceEnabled()) {
                        log.trace("Sending " + aspect.getType() + '(' + fullName + " -> " + counter.getValue() + ')');
                    }
                    switch (aspect.getType()) {
                        case GAUGE:
                            client.gauge(fullName, counter.getValue());
                            break;
                        case COUNTER:
                            client.count(fullName, counter.getValue());
                            break;
                        default:
                            client.time(fullName, counter.getValue());
                    }
                }
            }
        }
    }
}

Source File: EventReader.java From hadoop with Apache License 2.0

5 votes

static Counters fromAvro(JhCounters counters) {
  Counters result = new Counters();
  if(counters != null) {
    for (JhCounterGroup g : counters.groups) {
      CounterGroup group =
          result.addGroup(StringInterner.weakIntern(g.name.toString()), 
              StringInterner.weakIntern(g.displayName.toString()));
      for (JhCounter c : g.counts) {
        group.addCounter(StringInterner.weakIntern(c.name.toString()), 
            StringInterner.weakIntern(c.displayName.toString()), c.value);
      }
    }
  }
  return result;
}

Source File: TaskCounterGroupInfo.java From hadoop with Apache License 2.0

5 votes

public TaskCounterGroupInfo(String name, CounterGroup group) {
  this.counterGroupName = name;
  this.counter = new ArrayList<TaskCounterInfo>();

  for (Counter c : group) {
    TaskCounterInfo cinfo = new TaskCounterInfo(c.getName(), c.getValue());
    this.counter.add(cinfo);
  }
}

Source File: CounterGroupInfo.java From hadoop with Apache License 2.0

5 votes

public CounterGroupInfo(String name, CounterGroup group, CounterGroup mg,
    CounterGroup rg) {
  this.counterGroupName = name;
  this.counter = new ArrayList<CounterInfo>();

  for (Counter c : group) {
    Counter mc = mg == null ? null : mg.findCounter(c.getName());
    Counter rc = rg == null ? null : rg.findCounter(c.getName());
    CounterInfo cinfo = new CounterInfo(c, mc, rc);
    this.counter.add(cinfo);
  }
}

Source File: JobTaskCounterInfo.java From hadoop with Apache License 2.0

5 votes

public JobTaskCounterInfo(Task task) {
  total = task.getCounters();
  this.id = MRApps.toString(task.getID());
  taskCounterGroup = new ArrayList<TaskCounterGroupInfo>();
  if (total != null) {
    for (CounterGroup g : total) {
      if (g != null) {
        TaskCounterGroupInfo cginfo = new TaskCounterGroupInfo(g.getName(), g);
        taskCounterGroup.add(cginfo);
      }
    }
  }
}

Source File: TestJobHistoryEventHandler.java From hadoop with Apache License 2.0

5 votes

@Test (timeout=50000)
public void testCountersToJSON() throws Exception {
  JobHistoryEventHandler jheh = new JobHistoryEventHandler(null, 0);
  Counters counters = new Counters();
  CounterGroup group1 = counters.addGroup("DOCTORS",
          "Incarnations of the Doctor");
  group1.addCounter("PETER_CAPALDI", "Peter Capaldi", 12);
  group1.addCounter("MATT_SMITH", "Matt Smith", 11);
  group1.addCounter("DAVID_TENNANT", "David Tennant", 10);
  CounterGroup group2 = counters.addGroup("COMPANIONS",
          "Companions of the Doctor");
  group2.addCounter("CLARA_OSWALD", "Clara Oswald", 6);
  group2.addCounter("RORY_WILLIAMS", "Rory Williams", 5);
  group2.addCounter("AMY_POND", "Amy Pond", 4);
  group2.addCounter("MARTHA_JONES", "Martha Jones", 3);
  group2.addCounter("DONNA_NOBLE", "Donna Noble", 2);
  group2.addCounter("ROSE_TYLER", "Rose Tyler", 1);
  JsonNode jsonNode = jheh.countersToJSON(counters);
  String jsonStr = new ObjectMapper().writeValueAsString(jsonNode);
  String expected = "[{\"NAME\":\"COMPANIONS\",\"DISPLAY_NAME\":\"Companions "
      + "of the Doctor\",\"COUNTERS\":[{\"NAME\":\"AMY_POND\",\"DISPLAY_NAME\""
      + ":\"Amy Pond\",\"VALUE\":4},{\"NAME\":\"CLARA_OSWALD\","
      + "\"DISPLAY_NAME\":\"Clara Oswald\",\"VALUE\":6},{\"NAME\":"
      + "\"DONNA_NOBLE\",\"DISPLAY_NAME\":\"Donna Noble\",\"VALUE\":2},"
      + "{\"NAME\":\"MARTHA_JONES\",\"DISPLAY_NAME\":\"Martha Jones\","
      + "\"VALUE\":3},{\"NAME\":\"RORY_WILLIAMS\",\"DISPLAY_NAME\":\"Rory "
      + "Williams\",\"VALUE\":5},{\"NAME\":\"ROSE_TYLER\",\"DISPLAY_NAME\":"
      + "\"Rose Tyler\",\"VALUE\":1}]},{\"NAME\":\"DOCTORS\",\"DISPLAY_NAME\""
      + ":\"Incarnations of the Doctor\",\"COUNTERS\":[{\"NAME\":"
      + "\"DAVID_TENNANT\",\"DISPLAY_NAME\":\"David Tennant\",\"VALUE\":10},"
      + "{\"NAME\":\"MATT_SMITH\",\"DISPLAY_NAME\":\"Matt Smith\",\"VALUE\":"
      + "11},{\"NAME\":\"PETER_CAPALDI\",\"DISPLAY_NAME\":\"Peter Capaldi\","
      + "\"VALUE\":12}]}]";
  Assert.assertEquals(expected, jsonStr);
}

org.apache.hadoop.mapreduce.CounterGroup Java Examples