Example usage for org.apache.hadoop.service Service getFailureCause

Introduction

In this page you can find the example usage for org.apache.hadoop.service Service getFailureCause.

Prototype

Throwable getFailureCause();

Source Link

Document

Get the first exception raised during the service failure.

Usage

From source file:org.apache.hoya.yarn.service.CompoundService.java

License:Apache License

/**
 * When this service is started, any service stopping with a failure
 * exception is converted immediately into a failure of this service, 
 * storing the failure and stopping ourselves.
 * @param child the service that has changed.
 */// ww  w.  j a v a 2  s .co m
@Override
public void stateChanged(Service child) {
    //if that child stopped while we are running:
    if (isInState(STATE.STARTED) && child.isInState(STATE.STOPPED)) {
        // a child service has stopped
        //did the child fail? if so: propagate
        Throwable failureCause = child.getFailureCause();
        if (failureCause != null) {
            log.info("Child service " + child + " failed", failureCause);
            //failure. Convert to an exception
            Exception e = HoyaServiceUtils.convertToException(failureCause);
            //flip ourselves into the failed state
            noteFailure(e);
            stop();
        } else {
            log.info("Child service completed {}", child);
            if (areAllChildrenStopped()) {
                log.info("All children are halted: stopping");
                stop();
            }
        }
    }
}

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From source file:org.apache.hoya.yarn.service.SequenceService.java

License:Apache License

/**
 * handler for service completion: base class starts the next service
 * @param service service that has completed
 *///from ww  w  .  j  av  a  2s  . c o  m
protected synchronized void onServiceCompleted(Service service) {
    log.info("Running service stopped: {}", service);
    previousService = currentService;

    //start the next service if we are not stopped ourselves
    if (isInState(STATE.STARTED)) {

        //did the service fail? if so: propagate
        Throwable failureCause = service.getFailureCause();
        if (failureCause != null) {
            Exception e = HoyaServiceUtils.convertToException(failureCause);
            noteFailure(e);
            stop();
        }

        //start the next service
        boolean started;
        try {
            started = startNextService();
        } catch (Exception e) {
            //something went wrong here
            noteFailure(e);
            started = false;
        }
        if (!started) {
            //no start because list is empty
            //stop and expect the notification to go upstream
            stop();
        }
    } else {
        //not started, so just note that the current service
        //has gone away
        currentService = null;
    }
}

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From source file:org.apache.slider.server.services.workflow.WorkflowCompositeService.java

License:Apache License

/**
 * When this service is started, any service stopping with a failure
 * exception is converted immediately into a failure of this service, 
 * storing the failure and stopping ourselves.
 * @param child the service that has changed.
 *///from  w w w .  j a  va 2s  .  c o  m
@Override
public void stateChanged(Service child) {
    //if that child stopped while we are running:
    if (isInState(STATE.STARTED) && child.isInState(STATE.STOPPED)) {
        // a child service has stopped
        //did the child fail? if so: propagate
        Throwable failureCause = child.getFailureCause();
        if (failureCause != null) {
            LOG.info("Child service " + child + " failed", failureCause);
            //failure. Convert to an exception
            Exception e = (failureCause instanceof Exception) ? (Exception) failureCause
                    : new Exception(failureCause);
            //flip ourselves into the failed state
            noteFailure(e);
            stop();
        } else {
            LOG.info("Child service completed {}", child);
            if (areAllChildrenStopped()) {
                LOG.info("All children are halted: stopping");
                stop();
            }
        }
    }
}

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From source file:org.apache.slider.server.services.workflow.WorkflowSequenceService.java

License:Apache License

/**
 * handler for service completion: base class starts the next service
 * @param service service that has completed
 *//*from ww  w .  ja  v a  2 s  . c om*/
protected synchronized void onServiceCompleted(Service service) {
    LOG.info("Running service stopped: {}", service);
    previousService = activeService;

    //start the next service if we are not stopped ourselves
    if (isInState(STATE.STARTED)) {

        //did the service fail? if so: propagate
        Throwable failureCause = service.getFailureCause();
        if (failureCause != null) {
            Exception e = (failureCause instanceof Exception) ? (Exception) failureCause
                    : new Exception(failureCause);
            noteFailure(e);
            stop();
        }

        //start the next service
        boolean started;
        try {
            started = startNextService();
        } catch (Exception e) {
            //something went wrong here
            noteFailure(e);
            started = false;
        }
        if (!started) {
            //no start because list is empty
            //stop and expect the notification to go upstream
            stop();
        }
    } else {
        //not started, so just note that the current service
        //has gone away
        activeService = null;
    }
}

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From source file:org.apache.slider.server.services.workflow.WorkflowServiceTestBase.java

License:Apache License

protected void logService(Service s) {
    log.info(s.toString());/*from  ww w.j a v a  2s.  co  m*/
    Throwable failureCause = s.getFailureCause();
    if (failureCause != null) {
        log.info("Failed in state {} with {}", s.getFailureState(), failureCause);
    }
}

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