husky.server.HuskyRMCallbackHandler.java Source code

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Here is the source code for husky.server.HuskyRMCallbackHandler.java

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/* Copyright 2016 Husky Team
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package husky.server;

import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.yarn.api.records.*;
import org.apache.hadoop.yarn.client.api.async.AMRMClientAsync;
import org.apache.hadoop.yarn.util.ConverterUtils;
import org.apache.hadoop.yarn.util.Records;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

public class HuskyRMCallbackHandler implements AMRMClientAsync.CallbackHandler {
    private static final Logger LOG = Logger.getLogger(HuskyRMCallbackHandler.class.getName());

    private Thread masterThread = null;
    private ArrayList<Thread> mContainerThreads = new ArrayList<Thread>();
    private int mNumCompletedContainers = 0;
    private int mNumContainers = 0;
    private int mNumSuccess = 0;
    private HuskyApplicationMaster mAppMaster = null;

    class Lock {
        private boolean value = false;

        public void unlock() {
            value = true;
        }

        public boolean isLocked() {
            return value == false;
        }
    }

    private Lock finalResultLock = new Lock();

    public HuskyRMCallbackHandler(HuskyApplicationMaster master) {
        mAppMaster = master;
        mNumContainers = mAppMaster.getWorkerInfos().size();
        masterThread = new HuskyMaster(master);
        masterThread.start();
    }

    public float getProgress() {
        return ((float) mNumCompletedContainers) / mNumContainers;
    }

    public int getFinalNumSuccess() throws InterruptedException {
        if (finalResultLock.isLocked()) {
            synchronized (finalResultLock) {
                if (finalResultLock.isLocked()) {
                    finalResultLock.wait();
                }
            }
        }
        return mNumSuccess;
    }

    public String getStatusReport() {
        return String.format("Allocated: %d, Completed: %d, Succeeded: %d, Failed: %d\n", mContainerThreads.size(),
                mNumCompletedContainers, mNumSuccess, mNumCompletedContainers - mNumSuccess);
    }

    public void onContainersAllocated(List<Container> allocatedContainers) {
        LOG.info("Get response from RM for container request, allocatedCnt = " + allocatedContainers.size());
        constructLocalResources();
        for (Container container : allocatedContainers) {
            ContainerRunnable runnable = new HuskyWorker(mAppMaster, this, container);
            Thread containerThread = new Thread(runnable);
            mContainerThreads.add(containerThread);
            containerThread.start();
        }
    }

    public void onContainersCompleted(List<ContainerStatus> completedContainerStatus) {
        LOG.info("Get response from RM for container request, completedCnt = " + completedContainerStatus.size());
        mNumCompletedContainers += completedContainerStatus.size();
        for (ContainerStatus status : completedContainerStatus) {
            LOG.info(String.format("Container %s: %s, exit status: %d", status.getContainerId().toString(),
                    status.getState().toString(), status.getExitStatus()));
            if (status.getExitStatus() == 0) {
                mNumSuccess += 1;
            }
        }
        LOG.info("Total containers: " + mNumContainers + ", completed containers: " + mNumCompletedContainers);
        if (mNumContainers == mNumCompletedContainers) {
            // If all workers and master finish
            synchronized (finalResultLock) {
                finalResultLock.unlock();
                finalResultLock.notifyAll();
            }
        }
    }

    public void onError(Throwable arg0) {
        mAppMaster.getRMClient().stop();
    }

    public void onNodesUpdated(List<NodeReport> updatedNodes) {
    }

    public void onShutdownRequest() {
    }

    // should access through getLocalResources()
    private Map<String, LocalResource> localResources = null;

    private LocalResource constructLocalResource(String name, String path, LocalResourceType type)
            throws IOException {
        LOG.info("To copy " + name + " from " + path);
        if (!path.startsWith("hdfs://")) {
            throw new RuntimeException(
                    "Local resources provided to application master must be already located on HDFS.");
        }
        FileStatus dsfStaus = mAppMaster.getFileSystem().getFileStatus(new Path(path));
        LocalResource resource = Records.newRecord(LocalResource.class);
        resource.setType(type);
        resource.setVisibility(LocalResourceVisibility.APPLICATION);
        resource.setResource(ConverterUtils.getYarnUrlFromPath(new Path(path)));
        resource.setTimestamp(dsfStaus.getModificationTime());
        resource.setSize(dsfStaus.getLen());
        return resource;
    }

    private void constructLocalResources() {
        localResources = new HashMap<String, LocalResource>();

        try {
            String[][] resources = { { "HuskyAppExec", mAppMaster.getAppExec() },
                    { "HuskyMasterExec", mAppMaster.getMasterExec() },
                    { "HuskyConfigFile", mAppMaster.getConfigFile() } };

            for (String[] resource : resources) {
                LocalResource lr = constructLocalResource(resource[0], resource[1], LocalResourceType.FILE);
                localResources.put(resource[0], lr);
            }

            for (String i : mAppMaster.getLocalFiles().split(",")) {
                i = i.trim();
                if (!i.isEmpty()) {
                    String name = new Path(i).getName();
                    LocalResource lr = constructLocalResource(name, i, LocalResourceType.FILE);
                    localResources.put(name, lr);
                }
            }

            for (String i : mAppMaster.getLocalArchives().split(",")) {
                i = i.trim();
                if (!i.isEmpty()) {
                    String name = new Path(i).getName();
                    LocalResource lr = constructLocalResource(name, i, LocalResourceType.ARCHIVE);
                    localResources.put(name, lr);
                }
            }
        } catch (IOException e) {
            LOG.log(Level.WARNING, " Failed to construct local resource map: ", e);
        }
    }

    Map<String, LocalResource> getLocalResources() {
        if (localResources == null) {
            constructLocalResources();
        }
        return localResources;
    }
}