Java Counters.findCounter方法代碼示例

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
/**
 * Verify the values in the Counters against the expected number of entries written.
 *
 * @param expectedReferenced
 *          Expected number of referenced entrires
 * @param counters
 *          The Job's Counters object
 * @return True if the values match what's expected, false otherwise
 */
protected boolean verifyExpectedValues(long expectedReferenced, Counters counters) {
  final Counter referenced = counters.findCounter(Counts.REFERENCED);
  final Counter unreferenced = counters.findCounter(Counts.UNREFERENCED);
  boolean success = true;

  if (expectedReferenced != referenced.getValue()) {
    LOG.error("Expected referenced count does not match with actual referenced count. " +
        "expected referenced=" + expectedReferenced + " ,actual=" + referenced.getValue());
    success = false;
  }

  if (unreferenced.getValue() > 0) {
    final Counter multiref = counters.findCounter(Counts.EXTRAREFERENCES);
    boolean couldBeMultiRef = (multiref.getValue() == unreferenced.getValue());
    LOG.error("Unreferenced nodes were not expected. Unreferenced count=" + unreferenced.getValue()
        + (couldBeMultiRef ? "; could be due to duplicate random numbers" : ""));
    success = false;
  }

  return success;
}
 

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
/**
 * Verify that the Counters don't contain values which indicate an outright failure from the Reducers.
 *
 * @param counters
 *          The Job's counters
 * @return True if the "bad" counter objects are 0, false otherwise
 */
protected boolean verifyUnexpectedValues(Counters counters) {
  final Counter undefined = counters.findCounter(Counts.UNDEFINED);
  final Counter lostfamilies = counters.findCounter(Counts.LOST_FAMILIES);
  boolean success = true;

  if (undefined.getValue() > 0) {
    LOG.error("Found an undefined node. Undefined count=" + undefined.getValue());
    success = false;
  }

  if (lostfamilies.getValue() > 0) {
    LOG.error("Found nodes which lost big or tiny families, count=" + lostfamilies.getValue());
    success = false;
  }

  return success;
}
 

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
private void updateProgressSplits() {
  double newProgress = reportedStatus.progress;
  newProgress = Math.max(Math.min(newProgress, 1.0D), 0.0D);
  Counters counters = reportedStatus.counters;
  if (counters == null)
    return;

  WrappedProgressSplitsBlock splitsBlock = getProgressSplitBlock();
  if (splitsBlock != null) {
    long now = clock.getTime();
    long start = getLaunchTime(); // TODO Ensure not 0

    if (start != 0 && now - start <= Integer.MAX_VALUE) {
      splitsBlock.getProgressWallclockTime().extend(newProgress,
          (int) (now - start));
    }

    Counter cpuCounter = counters.findCounter(TaskCounter.CPU_MILLISECONDS);
    if (cpuCounter != null && cpuCounter.getValue() <= Integer.MAX_VALUE) {
      splitsBlock.getProgressCPUTime().extend(newProgress,
          (int) cpuCounter.getValue()); // long to int? TODO: FIX. Same below
    }

    Counter virtualBytes = counters
      .findCounter(TaskCounter.VIRTUAL_MEMORY_BYTES);
    if (virtualBytes != null) {
      splitsBlock.getProgressVirtualMemoryKbytes().extend(newProgress,
          (int) (virtualBytes.getValue() / (MEMORY_SPLITS_RESOLUTION)));
    }

    Counter physicalBytes = counters
      .findCounter(TaskCounter.PHYSICAL_MEMORY_BYTES);
    if (physicalBytes != null) {
      splitsBlock.getProgressPhysicalMemoryKbytes().extend(newProgress,
          (int) (physicalBytes.getValue() / (MEMORY_SPLITS_RESOLUTION)));
    }
  }
}
 

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
private void setSummarySlotSeconds(JobSummary summary, Counters allCounters) {

    Counter slotMillisMapCounter = allCounters
      .findCounter(JobCounter.SLOTS_MILLIS_MAPS);
    if (slotMillisMapCounter != null) {
      summary.setMapSlotSeconds(slotMillisMapCounter.getValue() / 1000);
    }

    Counter slotMillisReduceCounter = allCounters
      .findCounter(JobCounter.SLOTS_MILLIS_REDUCES);
    if (slotMillisReduceCounter != null) {
      summary.setReduceSlotSeconds(slotMillisReduceCounter.getValue() / 1000);
    }
  }
 

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
public boolean verify(long expectedReferenced) throws Exception {
  if (job == null) {
    throw new IllegalStateException("You should call run() first");
  }
  
  Counters counters = job.getCounters();
  
  Counter referenced = counters.findCounter(Counts.REFERENCED);
  Counter unreferenced = counters.findCounter(Counts.UNREFERENCED);
  Counter undefined = counters.findCounter(Counts.UNDEFINED);
  
  boolean success = true;
  //assert
  if (expectedReferenced != referenced.getValue()) {
    LOG.error("Expected referenced count does not match with actual referenced count. " +
    		"expected referenced=" + expectedReferenced + " ,actual=" + referenced.getValue());
    success = false;
  }

  if (unreferenced.getValue() > 0) { 
    LOG.error("Unreferenced nodes were not expected. Unreferenced count=" + unreferenced.getValue());
    success = false;
  }
  
  if (undefined.getValue() > 0) { 
    LOG.error("Found an undefined node. Undefined count=" + undefined.getValue());
    success = false;
  }
  
  return success;
}
 

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
private VespaCounters(Job job) throws IOException {
    Counters counters = job.getCounters();
    documentsSent = counters.findCounter(GROUP, DOCS_SENT);
    documentsOk = counters.findCounter(GROUP, DOCS_OK);
    documentsFailed = counters.findCounter(GROUP, DOCS_FAILED);
    documentsSkipped = counters.findCounter(GROUP, DOCS_SKIPPED);
}
 

import org.apache.hadoop.mapreduce.Counters; //導入方法依賴的package包/類
@Test
public void testCountersWithSpeculation() {
  mockTask = new MockTaskImpl(jobId, partition, dispatcher.getEventHandler(),
      remoteJobConfFile, conf, taskAttemptListener, jobToken,
      credentials, clock, startCount, metrics, appContext, TaskType.MAP) {
        @Override
        protected int getMaxAttempts() {
          return 1;
        }
  };
  TaskId taskId = getNewTaskID();
  scheduleTaskAttempt(taskId);
  launchTaskAttempt(getLastAttempt().getAttemptId());
  updateLastAttemptState(TaskAttemptState.RUNNING);
  MockTaskAttemptImpl baseAttempt = getLastAttempt();

  // add a speculative attempt
  mockTask.handle(new TaskTAttemptEvent(getLastAttempt().getAttemptId(),
      TaskEventType.T_ADD_SPEC_ATTEMPT));
  launchTaskAttempt(getLastAttempt().getAttemptId());
  updateLastAttemptState(TaskAttemptState.RUNNING);
  MockTaskAttemptImpl specAttempt = getLastAttempt();
  assertEquals(2, taskAttempts.size());

  Counters specAttemptCounters = new Counters();
  Counter cpuCounter = specAttemptCounters.findCounter(
      TaskCounter.CPU_MILLISECONDS);
  cpuCounter.setValue(1000);
  specAttempt.setCounters(specAttemptCounters);

  // have the spec attempt succeed but second attempt at 1.0 progress as well
  commitTaskAttempt(specAttempt.getAttemptId());
  specAttempt.setProgress(1.0f);
  specAttempt.setState(TaskAttemptState.SUCCEEDED);
  mockTask.handle(new TaskTAttemptEvent(specAttempt.getAttemptId(),
      TaskEventType.T_ATTEMPT_SUCCEEDED));
  assertEquals(TaskState.SUCCEEDED, mockTask.getState());
  baseAttempt.setProgress(1.0f);

  Counters taskCounters = mockTask.getCounters();
  assertEquals("wrong counters for task", specAttemptCounters, taskCounters);
}