How to use

extractFirstLine

method

in

org.apache.slider.common.tools.SliderUtils

@Override //AMRMClientAsync
public void onError(Throwable e) {
 if (e instanceof InvalidResourceRequestException) {
  // stop the cluster
  LOG_YARN.error("AMRMClientAsync.onError() received {}", e, e);
  ActionStopSlider stopSlider = new ActionStopSlider("stop",
    EXIT_EXCEPTION_THROWN, FinalApplicationStatus.FAILED,
    SliderUtils.extractFirstLine(e.getLocalizedMessage()));
  stopSlider.setExitReason(SliderExitReason.APP_ERROR);
  signalAMComplete(stopSlider);
 } else if (e instanceof InvalidApplicationMasterRequestException) {
  // halt the AM
  LOG_YARN.error("AMRMClientAsync.onError() received {}", e, e);
  queue(new ActionHalt(EXIT_EXCEPTION_THROWN,
    SliderUtils.extractFirstLine(e.getLocalizedMessage())));
 } else {
  // ignore and log
  LOG_YARN.info("Ignoring AMRMClientAsync.onError() received {}", e);
 }
}

@Override //AMRMClientAsync
public void onError(Throwable e) {
 if (e instanceof InvalidResourceRequestException) {
  // stop the cluster
  LOG_YARN.error("AMRMClientAsync.onError() received {}", e);
  ActionStopSlider stopSlider = new ActionStopSlider("stop",
    EXIT_EXCEPTION_THROWN, FinalApplicationStatus.FAILED,
    SliderUtils.extractFirstLine(e.getLocalizedMessage()));
  stopSlider.setExitReason(SliderExitReason.APP_ERROR);
  signalAMComplete(stopSlider);
 } else if (e instanceof InvalidApplicationMasterRequestException) {
  // halt the AM
  LOG_YARN.error("AMRMClientAsync.onError() received {}", e, e);
  queue(new ActionHalt(EXIT_EXCEPTION_THROWN,
    SliderUtils.extractFirstLine(e.getLocalizedMessage())));
 } else {
  // ignore and log
  LOG_YARN.info("Ignoring AMRMClientAsync.onError() received {}", e);
 }
}

/**
 * Handle any exception in a thread. If the exception provides an exit
 * code, that is the one that will be used.
 * @param thread thread throwing the exception
 * @param exception exception
 */
public void onExceptionInThread(Thread thread, Throwable exception) {
 log.error("Exception in {}: {}", thread.getName(), exception, exception);
 // if there is a teardown in progress, ignore it
 if (amCompletionFlag.get()) {
  log.info("Ignoring exception: shutdown in progress");
 } else {
  int exitCode = EXIT_EXCEPTION_THROWN;
  if (exception instanceof ExitCodeProvider) {
   exitCode = ((ExitCodeProvider) exception).getExitCode();
  }
  ActionStopSlider stopSlider = new ActionStopSlider("stop", exitCode,
    FinalApplicationStatus.FAILED,
    SliderUtils.extractFirstLine(exception.getLocalizedMessage()));
  stopSlider.setExitReason(SliderExitReason.SLIDER_AM_ERROR);
  signalAMComplete(stopSlider);
 }
}

/**
 * Handle any exception in a thread. If the exception provides an exit
 * code, that is the one that will be used.
 * @param thread thread throwing the exception
 * @param exception exception
 */
public void onExceptionInThread(Thread thread, Throwable exception) {
 log.error("Exception in {}: {}", thread.getName(), exception, exception);
 // if there is a teardown in progress, ignore it
 if (amCompletionFlag.get()) {
  log.info("Ignoring exception: shutdown in progress");
 } else {
  int exitCode = EXIT_EXCEPTION_THROWN;
  if (exception instanceof ExitCodeProvider) {
   exitCode = ((ExitCodeProvider) exception).getExitCode();
  }
  ActionStopSlider stopSlider = new ActionStopSlider("stop", exitCode,
    FinalApplicationStatus.FAILED,
    SliderUtils.extractFirstLine(exception.getLocalizedMessage()));
  stopSlider.setExitReason(SliderExitReason.SLIDER_AM_ERROR);
  signalAMComplete(stopSlider);
 }
}

@Test
public void testExtractFirstLine() {
 String firstLine = "hello";
 String msg = firstLine + "\n2nd line\n3rd line";
 Assert.assertEquals("Should be first line only", firstLine,
   SliderUtils.extractFirstLine(msg));
 msg = "";
 Assert.assertEquals("Should be empty", msg,
   SliderUtils.extractFirstLine(msg));
 msg = "   ";
 Assert.assertEquals("Should contain spaces only", msg,
   SliderUtils.extractFirstLine(msg));
 msg = null;
 Assert.assertEquals("Should be null", msg,
   SliderUtils.extractFirstLine(msg));
}

 @Test
 public void testExtractFirstLine() {
  String firstLine = "hello";
  String msg = firstLine + "\n2nd line\n3rd line";
  Assert.assertEquals("Should be first line only", firstLine,
    SliderUtils.extractFirstLine(msg));
  msg = "";
  Assert.assertEquals("Should be empty", msg,
    SliderUtils.extractFirstLine(msg));
  msg = "   ";
  Assert.assertEquals("Should contain spaces only", msg,
    SliderUtils.extractFirstLine(msg));
  msg = null;
  Assert.assertEquals("Should be null", msg,
    SliderUtils.extractFirstLine(msg));
 }
}