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/*
*
* * Copyright 2015 Skymind,Inc.
* *
* * 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 org.deeplearning4j.scaleout.statetracker.hazelcast;
import com.hazelcast.client.HazelcastClient;
import com.hazelcast.client.config.ClientConfig;
import com.hazelcast.config.*;
import com.hazelcast.core.*;
import org.apache.commons.io.IOUtils;
import org.deeplearning4j.scaleout.actor.util.PortTaken;
import org.deeplearning4j.scaleout.aggregator.JobAggregator;
import org.deeplearning4j.scaleout.api.statetracker.*;
import org.deeplearning4j.scaleout.job.Job;
import org.deeplearning4j.scaleout.statetracker.updatesaver.LocalFileUpdateSaver;
import org.deeplearning4j.scaleout.statetracker.workretriever.LocalWorkRetriever;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;
import java.io.*;
import java.net.InetAddress;
import java.util.*;
/**
* Baseline hazelcast state tracker
* @author Adam Gibson
*/
public abstract class BaseHazelCastStateTracker implements StateTracker {
/**
*
*/
private static final long serialVersionUID = -7374372180080957334L;
public final static String JOBS = "org.deeplearning4j.jobs";
public final static String NUM_TIMES_PRETRAIN_RAN = "pretrainran";
public final static String WORKERS = "org.deeplearning4j.workers";
public final static String AVAILABLE_WORKERS = "AVAILABLE_WORKERS";
public final static String NUM_TIMES_RUN_PRETRAIN = "PRETRAIN";
public final static String TOPICS = "topics";
public final static String RESULT = "RESULT";
public final static String DONE = "done";
public final static String UPDATES = "updates";
public final static String REPLICATE_WEIGHTS = "replicate";
public final static String HEART_BEAT = "heartbeat";
public final static String WORKER_ENABLED = "workerenabled";
public final static String INPUT_SPLIT = "inputsplit";
public final static String IS_PRETRAIN = "ispretrain";
public final static String BEST_LOSS = "bestloss";
public final static String IMPROVEMENT_THRESHOLD = "improvementthreshold";
public final static String EARLY_STOP = "earlystop";
public final static String PATIENCE = "patience";
public final static String BEGUN = "begun";
public final static String NUM_BATCHES_SO_FAR_RAN = "numbatches";
public final static String GLOBAL_REFERENCE = "globalreference";
public final static String RECENTLY_CLEARED = "recentlycleared";
private volatile transient IAtomicReference master;
private volatile transient IList jobs;
private volatile transient IAtomicReference numTimesPretrain;
private volatile transient IAtomicReference numTimesPretrainRan;
private volatile transient IAtomicReference bestLoss;
private volatile transient IAtomicReference numBatches;
private volatile transient ISet recentlyClearedJobs;
private volatile transient IAtomicReference earlyStop;
private volatile transient IMap references;
private volatile transient IAtomicReference done;
private volatile transient IList replicate;
private volatile transient IMap workerEnabled;
private volatile transient IList workers;
private volatile transient IList topics;
private volatile transient IList updates;
private volatile IAtomicReference patience;
private volatile IAtomicReference begunTraining;
private volatile IAtomicReference miniBatchSize;
private WorkRetriever workRetriever = new LocalWorkRetriever();
protected UpdateSaver saver;
private volatile IAtomicReference isPretrain;
private static final Logger log = LoggerFactory.getLogger(HazelCastStateTracker.class);
private transient Config config;
public final static int DEFAULT_HAZELCAST_PORT = 2510;
private transient HazelcastInstance h;
private String type = "master";
private int hazelCastPort = -1;
private String connectionString;
private Map heartbeat;
private StateTrackerDropWizardResource resource;
protected JobAggregator jobAggregator;
protected Serializable cachedCurrent;
public final static String HAZELCAST_HOST = "hazelcast.host";
private List listeners = new ArrayList<>();
public BaseHazelCastStateTracker() throws Exception {
this(DEFAULT_HAZELCAST_PORT);
}
@Override
public void define(String key, E o) {
references.put(key,o);
}
@Override
public E get(String key) {
return (E) references.get(key);
}
@Override
public double count(String key) {
IAtomicLong long2 = h.getAtomicLong(key);
return long2.get();
}
@Override
public void increment(String key, double by) {
IAtomicLong long2 = h.getAtomicLong(key);
long2.addAndGet((long) by);
}
@Override
public void removeUpdateListener(NewUpdateListener listener) {
listeners.remove(listener);
}
@Override
public void addUpdateListener(NewUpdateListener listener) {
listeners.add(listener);
}
/**
* Number of batches ran so far
*
* @return the number of batches ran so far
*/
@Override
public int numBatchesRan() {
return numBatches.get();
}
/**
* Increments the number of batches ran.
* This is purely a count and does not necessarily mean progress.
*
* @param numBatchesRan the number of batches ran to increment by
*/
@Override
public void incrementBatchesRan(int numBatchesRan) {
numBatches.set(numBatchesRan + numBatches.get());
}
/**
* Starts the rest api
*/
@Override
public void startRestApi() {
String startApi = System.getProperty("startapi","false");
Boolean b = Boolean.parseBoolean(startApi);
if(!b)
return;
try {
if(PortTaken.portTaken(8080) || PortTaken.portTaken(8180)) {
log.warn("Port taken for rest api");
return;
}
InputStream is = new ClassPathResource("/hazelcast/dropwizard.yml").getInputStream();
resource = new StateTrackerDropWizardResource(this);
File tmpConfig = new File("hazelcast/dropwizard.yml");
if(!tmpConfig.getParentFile().exists())
tmpConfig.getParentFile().mkdirs();
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(tmpConfig));
IOUtils.copy(is, bos);
bos.flush();
resource.run("server",tmpConfig.getAbsolutePath());
tmpConfig.deleteOnExit();
}
catch(Error e1) {
log.warn("Unable to start server",e1);
}
catch(Exception e) {
log.warn("Unable to start server",e);
}
}
@Override
public JobAggregator jobAggregator() {
return jobAggregator;
}
@Override
public void setJobAggregator(JobAggregator aggregator) {
this.jobAggregator = aggregator;
}
public abstract UpdateSaver createUpdateSaver();
/**
* Current mini batch size
*
* @return
*/
@Override
public int miniBatchSize() {
return miniBatchSize.get();
}
/**
* Whether the cluster has begun training
*
* @return whether the cluster has begun training
*/
@Override
public boolean hasBegun() {
return begunTraining.get();
}
/**
* Removes the worker data
*
* @param worker the worker to remove
*/
@Override
public void removeWorkerData(String worker) {
workRetriever.clear(worker);
}
/**
* The collection of dat
*
* @return
*/
@Override
public Collection workerData() {
return workRetriever.workers();
}
/**
* Sets the work retriever to use for storing data sets for workers
*
* @param workRetriever the work retreiver to use with this state tracker
*/
@Override
public void setWorkRetriever(WorkRetriever workRetriever) {
this.workRetriever = workRetriever;
}
/**
* A collection of worker updates.
* This should be used to track
* which workers have actually contributed an update for a given mini batch
*
* @return the worker updates
*/
@Override
public Collection workerUpdates() {
return updates;
}
/**
* The update saver to use
*
* @param updateSaver the update saver to use
*/
@Override
public void setUpdateSaver(UpdateSaver updateSaver) {
this.saver = updateSaver;
}
/**
* The update saver used with this state tracker
*
* @return the update saver used with this state tracker
*/
@Override
public UpdateSaver updateSaver() {
return saver;
}
/**
* Sets the input split
*
* @param batchSize the input split to use
*/
@Override
public void setMiniBatchSize(int batchSize) {
this.miniBatchSize.set(batchSize);
}
/**
* The input split to use.
* This means that each data applyTransformToDestination that is trained on
* and loaded will be this batch size or lower
* per worker
*
* @return the input split to use
*/
@Override
public int inputSplit() {
Integer get = miniBatchSize.get();
if(get == null)
miniBatchSize.set(10);
return (miniBatchSize.get() * numWorkers()) / numWorkers();
}
/**
* Returns the partition (optimal batch size)
* given the available workers and the specified input split
*
* @return the optimal batch size
*/
@Override
public int partition() {
return inputSplit();
}
/**
* Returns the status of whether the worker is enabled or not
*
* @param id the id of the worker to test
* @return true if the worker is enabled, false otherwise
*/
@Override
public boolean workerEnabled(String id) {
return workerEnabled.containsKey(id) && workerEnabled.get(id);
}
/**
* Enables the worker with the given id,
* allowing it to take jobs again
*
* @param id the id of the worker to enable
*/
@Override
public void enableWorker(String id) {
workerEnabled.put(id,true);
}
/**
* Disables the worker with the given id,
* this means that it will not iterate
* or take any new jobs until re enabled
*
* @param id the id of the worker to disable
*/
@Override
public void disableWorker(String id) {
workerEnabled.put(id,false);
}
/**
* Updates the status of the worker to not needing replication
*
* @param workerId the worker id to update
*/
@Override
public void doneReplicating(String workerId) {
replicate.remove(workerId);
}
/**
* Adds a worker to the list to be replicate d
*
* @param workerId the worker id to add
*/
@Override
public void addReplicate(String workerId) {
if(!replicate.contains(workerId))
replicate.add(workerId);
}
/**
* Tracks worker ids that need state replication
*
* @param workerId the worker id to replicate
* @return the list of worker ids that need state replication
*/
@Override
public boolean needsReplicate(String workerId) {
return replicate.contains(workerId);
}
/**
* Adds an update to the current mini batch
* @param id the id of the worker who did the update
* @param update the update to add
*/
@Override
public void addUpdate(String id,Job update) {
if(update == null)
return;
try {
updateSaver().save(id,update);
update.setWork(null);
update.setResult(null);
} catch (Exception e) {
throw new RuntimeException(e);
}
updates.add(id);
}
/**
* Updates for mini batches
*
* @return the current list of updates for mini batches
*/
@Override
public abstract IterateAndUpdate updates();
/**
* Sets the connection string for connecting to the server
*
* @param connectionString the connection string to use
*/
@Override
public void setConnectionString(String connectionString) {
this.connectionString = connectionString;
}
/**
* Connection string for connecting to the server
*
* @return the connection string for connecting to the server
*/
@Override
public String connectionString() {
return connectionString;
}
/**
* Initializes the state tracker binding to the given port
* @param stateTrackerPort the port to bind to
* @throws Exception
*/
public BaseHazelCastStateTracker(int stateTrackerPort) throws Exception {
this("master","master",stateTrackerPort);
}
/**
* Worker constructor
* @param connectionString
*/
public BaseHazelCastStateTracker(String connectionString) throws Exception {
this(connectionString,"worker",DEFAULT_HAZELCAST_PORT);
}
/**
*
* @param connectionString
* @param type
* @param stateTrackerPort
* @throws Exception
*/
public BaseHazelCastStateTracker(String connectionString,String type,int stateTrackerPort) throws Exception {
log.info("Setting up hazelcast with type " + type + " connection string " + connectionString + " and port " + stateTrackerPort);
if(type.equals("master") && !PortTaken.portTaken(stateTrackerPort)) {
//sets up a proper connection string for reference wrt external actors needing a reference
if(connectionString.equals("master")) {
String hazelCastHost;
try {
//try localhost fall back to 0.0.0.0
hazelCastHost = System.getProperty(HAZELCAST_HOST, InetAddress.getLocalHost().getHostName());
}catch(Exception e) {
hazelCastHost = "0.0.0.0";
}
this.connectionString = hazelCastHost + ":" + stateTrackerPort;
}
this.hazelCastPort = stateTrackerPort;
config = hazelcast();
h = Hazelcast.newHazelcastInstance(config);
h.getCluster().addMembershipListener(new MembershipListener() {
@Override
public void memberAdded(MembershipEvent membershipEvent) {
log.info("Member added " + membershipEvent.toString());
}
@Override
public void memberRemoved(MembershipEvent membershipEvent) {
log.info("Member removed " + membershipEvent.toString());
}
@Override
public void memberAttributeChanged(
MemberAttributeEvent memberAttributeEvent) {
log.info("Member changed " + memberAttributeEvent.toString());
}
});
}
else if(type.equals("master") && PortTaken.portTaken(stateTrackerPort))
throw new IllegalStateException("Specified type was master and the port specified was taken, please specify a different port");
else {
setConnectionString(connectionString);
log.info("Connecting to hazelcast on " + connectionString);
ClientConfig client = new ClientConfig();
client.getNetworkConfig().addAddress(connectionString);
h = HazelcastClient.newHazelcastClient(client);
}
this.type = type;
jobs = h.getList(JOBS);
workers = h.getList(WORKERS);
recentlyClearedJobs = h.getSet(RECENTLY_CLEARED);
begunTraining = h.getAtomicReference(BEGUN);
miniBatchSize = h.getAtomicReference(INPUT_SPLIT);
workerEnabled = h.getMap(WORKER_ENABLED);
replicate = h.getList(REPLICATE_WEIGHTS);
topics = h.getList(TOPICS);
updates = h.getList(UPDATES);
heartbeat = h.getMap(HEART_BEAT);
master = h.getAtomicReference(RESULT);
isPretrain = h.getAtomicReference(IS_PRETRAIN);
numTimesPretrain = h.getAtomicReference(NUM_TIMES_RUN_PRETRAIN);
numTimesPretrainRan = h.getAtomicReference(NUM_TIMES_PRETRAIN_RAN);
done = h.getAtomicReference(DONE);
bestLoss = h.getAtomicReference(BEST_LOSS);
earlyStop = h.getAtomicReference(EARLY_STOP);
patience = h.getAtomicReference(PATIENCE);
numBatches = h.getAtomicReference(NUM_BATCHES_SO_FAR_RAN);
references = h.getMap(GLOBAL_REFERENCE);
//applyTransformToDestination defaults only when master, otherwise, overrides previous values
if(type.equals("master")) {
begunTraining.set(false);
saver = createUpdateSaver();
numTimesPretrainRan.set(0);
numTimesPretrain.set(1);
isPretrain.set(true);
done.set(false);
resource = new StateTrackerDropWizardResource(this);
bestLoss.set(Double.POSITIVE_INFINITY);
earlyStop.set(true);
numBatches.set(0);
}
workRetriever = new LocalWorkRetriever(h);
}
private Config hazelcast() {
Config conf = new Config();
conf.getNetworkConfig().setPort(hazelCastPort);
conf.getNetworkConfig().setPortAutoIncrement(false);
conf.setProperty("hazelcast.initial.min.cluster.size","1");
conf.setProperty("hazelcast.shutdownhook.enabled","false");
JoinConfig join = conf.getNetworkConfig().getJoin();
boolean isAws = System.getProperty("hazelcast.aws","false").equals("true");
log.info("Setting up Joiner with this being " + (isAws ? "AWS" : "Multicast"));
join.getAwsConfig().setEnabled(isAws);
if(isAws) {
join.getAwsConfig().setAccessKey(System.getProperty("hazelcast.access-key"));
join.getAwsConfig().setSecretKey(System.getProperty("hazelcast.access-secret"));
}
join.getMulticastConfig().setEnabled(!isAws);
String interf = System.getProperty("hazelcast.interface");
if (interf != null) {
conf.getNetworkConfig().getInterfaces().setEnabled(true).addInterface(interf);
}
ListConfig jobConfig = new ListConfig();
jobConfig.setName(JOBS);
conf.addListConfig(jobConfig);
ListConfig replicateConfig = new ListConfig();
replicateConfig.setName(REPLICATE_WEIGHTS);
conf.addListConfig(replicateConfig);
SetConfig cleared = new SetConfig();
cleared.setName(RECENTLY_CLEARED);
MapConfig referenceConfig = new MapConfig();
referenceConfig.setName(GLOBAL_REFERENCE);
conf.addMapConfig(referenceConfig);
ListConfig topicsConfig = new ListConfig();
topicsConfig.setName(TOPICS);
conf.addListConfig(topicsConfig);
ListConfig updatesConfig = new ListConfig();
updatesConfig.setName(UPDATES);
conf.addListConfig(updatesConfig);
ListConfig availableWorkersConfig = new ListConfig();
availableWorkersConfig.setName(AVAILABLE_WORKERS);
conf.addListConfig(availableWorkersConfig);
MapConfig heartbeatConfig = new MapConfig();
heartbeatConfig.setName(HEART_BEAT);
conf.addMapConfig(heartbeatConfig);
MapConfig workerEnabledConfig = new MapConfig();
workerEnabledConfig.setName(WORKER_ENABLED);
conf.addMapConfig(workerEnabledConfig);
MapConfig fileUpdateSaver = new MapConfig();
fileUpdateSaver.setName(LocalFileUpdateSaver.UPDATE_SAVER);
conf.addMapConfig(fileUpdateSaver);
MapConfig workRetriever = new MapConfig();
workRetriever.setName(LocalWorkRetriever.WORK_RETRIEVER);
conf.addMapConfig(workRetriever);
return conf;
}
@Override
public boolean addJobToCurrent(Job j) throws Exception {
IAtomicReference r = h.getAtomicReference("job-" + j.workerId());
if(r.get() != null || !r.isNull()) {
boolean sent = false;
while(!sent) {
//always update
for(String s : workers()) {
if(jobFor(s) == null) {
log.info("Redirecting worker " + j.workerId() + " to " + s + " due to work already being allocated");
r = h.getAtomicReference("job-" + s);
j.setWorkerId(s);
sent = true;
}
}
}
}
r.set(j);
jobs.add(j);
return true;
}
@Override
public void setServerPort(int port) {
this.hazelCastPort = port;
}
@Override
public int getServerPort() {
return hazelCastPort;
}
@Override
public List currentJobs() throws Exception {
return jobs;
}
@Override
public Set recentlyCleared() {
return recentlyClearedJobs;
}
/**
* Assuming a job already exists, updates the job
*
* @param j the job to update
*/
@Override
public void updateJob(Job j) {
IAtomicReference jRef = h.getAtomicReference("job-" + j.workerId());
jRef.set(j);
}
@Override
public void clearJob(String id) throws Exception {
if(id == null) {
log.warn("No job to clear; was null, returning");
return;
}
recentlyClearedJobs.add(id);
IAtomicReference jRef = h.getAtomicReference("job-" + id);
if(jRef.isNull())
return;
jRef.clear();
log.info("Destroyed job ref " + id);
Job remove = null;
for(Job j : jobs) {
if(j.workerId().equals(id)) {
remove = j;
break;
}
}
if(remove != null)
jobs.remove(remove);
}
@Override
public void shutdown() {
if(h != null) {
h.shutdown();
h.getLifecycleService().shutdown();
}
if(resource != null)
resource.shutdown();
}
@Override
public void addTopic(String topic) throws Exception {
topics.add(topic);
}
@Override
public List topics() throws Exception {
return topics;
}
@Override
public Serializable getCurrent() throws Exception {
if(cachedCurrent != null)
return cachedCurrent;
Serializable u = master.get();
if(u == null)
return null;
return u;
}
@Override
public void setCurrent(Serializable e) throws Exception {
if(e == null) {
log.warn("Not setting a null update");
return;
}
for(NewUpdateListener listener : listeners) {
listener.onUpdate(e);
}
this.master.set(e);
}
@Override
public Job jobFor(String id) {
if(done.get())
return null;
IAtomicReference j = h.getAtomicReference("job-" + id);
if(j.isNull() || isCurrentlyJob(id))
return null;
return j.get();
}
private boolean isCurrentlyJob(String id) {
for(Job j : jobs)
if(j.equals(id))
return true;
return false;
}
@Override
public void availableForWork(String id) {
if(!workers.contains(id))
workers.add(id);
}
@Override
public List jobIds() {
List ret = new ArrayList<>();
for(Job j : this.jobs)
ret.add(j.workerId());
return ret;
}
@Override
public void addWorker(String worker) {
heartbeat.put(worker, System.currentTimeMillis());
if(!workers.contains(worker)) {
log.info("Adding worker " + worker);
workers.add(worker);
log.info("Number of workers is now " + workers.size());
}
}
@Override
public void removeWorker(String worker) {
workers.remove(worker);
if(jobFor(worker) != null) {
try {
clearJob(worker);
}catch(Exception e) {
log.warn("Unable to clear job for worker with id" + worker);
}
}
}
@Override
public List workers() {
return workers;
}
@Override
public int numWorkers() {
int num = workers.size();
if(num < 1)
throw new IllegalStateException("There appears to have been an issue during initialization. No workers found.");
return num;
}
public synchronized HazelcastInstance getH() {
return h;
}
public synchronized void setH(HazelcastInstance h) {
this.h = h;
}
@Override
public Map getHeartBeats() {
return heartbeat;
}
@Override
public void runPreTrainIterations(int numTimes) {
numTimesPretrain.set(numTimes);
}
@Override
public int runPreTrainIterations() {
return numTimesPretrain.get();
}
@Override
public int numTimesPreTrainRun() {
return numTimesPretrainRan.get();
}
@Override
public void incrementNumTimesPreTrainRan() {
numTimesPretrainRan.set(numTimesPreTrainRun() + 1);
}
@Override
public boolean isDone() {
//reason being that isDone() may getFromOrigin called and throw errors
//this ensures a safe method call happens and just silently
//returns true in case hazelcast is shutdown
try {
return done.get();
}catch(Exception e) {
log.warn("Hazelcast already shutdown...returning true on isDone()");
return true;
}
}
@Override
public void finish() {
//reason being that isDone() may getFromOrigin called and throw errors
//this ensures a safe method call happens and just silently
//returns true in case hazelcast is shutdown
try {
if(getCurrent() != null) {
cachedCurrent = getCurrent();
for(NewUpdateListener listener : listeners)
listener.onUpdate(cachedCurrent);
}
done.set(true);
updateSaver().cleanup();
}catch(Exception e) {
log.warn("Hazelcast already shutdown...done() being called is pointless");
}
}
}
