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Example 1 with VariableBatchSizeIterator

use of org.ow2.proactive.scheduler.core.helpers.VariableBatchSizeIterator in project scheduling by ow2-proactive.

the class SchedulingMethodImpl method selectAndStartTasks.

private int selectAndStartTasks(Policy currentPolicy, Map<JobId, JobDescriptor> jobMap, Set<String> freeResources, LinkedList<EligibleTaskDescriptor> fullListOfTaskRetrievedFromPolicy) {
    int numberOfTaskStarted = 0;
    VariableBatchSizeIterator progressiveIterator = new VariableBatchSizeIterator(fullListOfTaskRetrievedFromPolicy);
    while (progressiveIterator.hasMoreElements() && !freeResources.isEmpty()) {
        LinkedList<EligibleTaskDescriptor> taskRetrievedFromPolicy = new LinkedList<>(progressiveIterator.getNextElements(freeResources.size()));
        if (logger.isDebugEnabled()) {
            loggingEligibleTasksDetails(fullListOfTaskRetrievedFromPolicy, taskRetrievedFromPolicy);
        }
        updateVariablesForTasksToSchedule(taskRetrievedFromPolicy);
        for (EligibleTaskDescriptor etd : taskRetrievedFromPolicy) {
            // load and Initialize the executable container
            loadAndInit(((EligibleTaskDescriptorImpl) etd).getInternal());
        }
        while (!taskRetrievedFromPolicy.isEmpty()) {
            if (freeResources.isEmpty()) {
                break;
            }
            // get the next compatible tasks from the whole returned policy tasks
            LinkedList<EligibleTaskDescriptor> tasksToSchedule = new LinkedList<>();
            int neededResourcesNumber = 0;
            while (!taskRetrievedFromPolicy.isEmpty() && neededResourcesNumber == 0) {
                // the loop will search for next compatible task until it find something
                neededResourcesNumber = getNextcompatibleTasks(jobMap, taskRetrievedFromPolicy, freeResources.size(), tasksToSchedule);
            }
            if (logger.isDebugEnabled()) {
                logger.debug("tasksToSchedule : " + tasksToSchedule);
            }
            logger.debug("required number of nodes : " + neededResourcesNumber);
            if (neededResourcesNumber == 0 || tasksToSchedule.isEmpty()) {
                break;
            }
            NodeSet nodeSet = getRMNodes(jobMap, neededResourcesNumber, tasksToSchedule, freeResources);
            if (nodeSet != null) {
                freeResources.removeAll(nodeSet.getAllNodesUrls());
            }
            // start selected tasks
            Node node = null;
            InternalJob currentJob = null;
            try {
                while (nodeSet != null && !nodeSet.isEmpty()) {
                    EligibleTaskDescriptor taskDescriptor = tasksToSchedule.removeFirst();
                    currentJob = ((JobDescriptorImpl) jobMap.get(taskDescriptor.getJobId())).getInternal();
                    InternalTask internalTask = ((EligibleTaskDescriptorImpl) taskDescriptor).getInternal();
                    if (currentPolicy.isTaskExecutable(nodeSet, taskDescriptor)) {
                        // create launcher and try to start the task
                        node = nodeSet.get(0);
                        if (createExecution(nodeSet, node, currentJob, internalTask, taskDescriptor)) {
                            numberOfTaskStarted++;
                        }
                    }
                    // if every task that should be launched have been removed
                    if (tasksToSchedule.isEmpty()) {
                        // get back unused nodes to the RManager
                        if (!nodeSet.isEmpty()) {
                            releaseNodes(currentJob, nodeSet);
                            freeResources.addAll(nodeSet.getAllNodesUrls());
                        }
                        // and leave the loop
                        break;
                    }
                }
            } catch (ActiveObjectCreationException e1) {
                // Something goes wrong with the active object creation (createLauncher)
                logger.warn("An exception occured while creating the task launcher.", e1);
                // so try to get back every remaining nodes to the resource manager
                try {
                    releaseNodes(currentJob, nodeSet);
                    freeResources.addAll(nodeSet.getAllNodesUrls());
                } catch (Exception e2) {
                    logger.info("Unable to get back the nodeSet to the RM", e2);
                }
                if (--activeObjectCreationRetryTimeNumber == 0) {
                    break;
                }
            } catch (Exception e1) {
                // if we are here, it is that something append while launching the current task.
                logger.warn("An exception occured while starting task.", e1);
                // so try to get back every remaining nodes to the resource manager
                try {
                    releaseNodes(currentJob, nodeSet);
                    freeResources.addAll(nodeSet.getAllNodesUrls());
                } catch (Exception e2) {
                    logger.info("Unable to get back the nodeSet to the RM", e2);
                }
            }
        }
        if (freeResources.isEmpty()) {
            break;
        }
        if (activeObjectCreationRetryTimeNumber == 0) {
            break;
        }
    }
    return numberOfTaskStarted;
}
Also used : NodeSet(org.ow2.proactive.utils.NodeSet) InternalJob(org.ow2.proactive.scheduler.job.InternalJob) EligibleTaskDescriptor(org.ow2.proactive.scheduler.descriptor.EligibleTaskDescriptor) InternalTask(org.ow2.proactive.scheduler.task.internal.InternalTask) Node(org.objectweb.proactive.core.node.Node) EligibleTaskDescriptorImpl(org.ow2.proactive.scheduler.descriptor.EligibleTaskDescriptorImpl) VariableBatchSizeIterator(org.ow2.proactive.scheduler.core.helpers.VariableBatchSizeIterator) LinkedList(java.util.LinkedList) ActiveObjectCreationException(org.objectweb.proactive.ActiveObjectCreationException) ActiveObjectCreationException(org.objectweb.proactive.ActiveObjectCreationException) TopologyDisabledException(org.ow2.proactive.resourcemanager.frontend.topology.TopologyDisabledException) InvalidScriptException(org.ow2.proactive.scripting.InvalidScriptException) RMProxyCreationException(org.ow2.proactive.scheduler.core.rmproxies.RMProxyCreationException) IOException(java.io.IOException)

Aggregations

IOException (java.io.IOException)1 LinkedList (java.util.LinkedList)1 ActiveObjectCreationException (org.objectweb.proactive.ActiveObjectCreationException)1 Node (org.objectweb.proactive.core.node.Node)1 TopologyDisabledException (org.ow2.proactive.resourcemanager.frontend.topology.TopologyDisabledException)1 VariableBatchSizeIterator (org.ow2.proactive.scheduler.core.helpers.VariableBatchSizeIterator)1 RMProxyCreationException (org.ow2.proactive.scheduler.core.rmproxies.RMProxyCreationException)1 EligibleTaskDescriptor (org.ow2.proactive.scheduler.descriptor.EligibleTaskDescriptor)1 EligibleTaskDescriptorImpl (org.ow2.proactive.scheduler.descriptor.EligibleTaskDescriptorImpl)1 InternalJob (org.ow2.proactive.scheduler.job.InternalJob)1 InternalTask (org.ow2.proactive.scheduler.task.internal.InternalTask)1 InvalidScriptException (org.ow2.proactive.scripting.InvalidScriptException)1 NodeSet (org.ow2.proactive.utils.NodeSet)1