1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.spark.network.shuffle.mesos;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
import org.apache.spark.network.shuffle.protocol.mesos.ShuffleServiceHeartbeat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.spark.network.client.RpcResponseCallback;
import org.apache.spark.network.client.TransportClient;
import org.apache.spark.network.sasl.SecretKeyHolder;
import org.apache.spark.network.shuffle.ExternalShuffleClient;
import org.apache.spark.network.shuffle.protocol.mesos.RegisterDriver;
import org.apache.spark.network.util.TransportConf;
/**
* A client for talking to the external shuffle service in Mesos coarse-grained mode.
*
* This is used by the Spark driver to register with each external shuffle service on the cluster.
* The reason why the driver has to talk to the service is for cleaning up shuffle files reliably
* after the application exits. Mesos does not provide a great alternative to do this, so Spark
* has to detect this itself.
*/
public class MesosExternalShuffleClient extends ExternalShuffleClient {
private static final Logger logger = LoggerFactory.getLogger(MesosExternalShuffleClient.class);
private final ScheduledExecutorService heartbeaterThread =
Executors.newSingleThreadScheduledExecutor(
new ThreadFactoryBuilder()
.setDaemon(true)
.setNameFormat("mesos-external-shuffle-client-heartbeater")
.build());
/**
* Creates an Mesos external shuffle client that wraps the {@link ExternalShuffleClient}.
* Please refer to docs on {@link ExternalShuffleClient} for more information.
*/
public MesosExternalShuffleClient(
TransportConf conf,
SecretKeyHolder secretKeyHolder,
boolean saslEnabled,
boolean saslEncryptionEnabled) {
super(conf, secretKeyHolder, saslEnabled, saslEncryptionEnabled);
}
public void registerDriverWithShuffleService(
String host,
int port,
long heartbeatTimeoutMs,
long heartbeatIntervalMs) throws IOException {
checkInit();
ByteBuffer registerDriver = new RegisterDriver(appId, heartbeatTimeoutMs).toByteBuffer();
TransportClient client = clientFactory.createClient(host, port);
client.sendRpc(registerDriver, new RegisterDriverCallback(client, heartbeatIntervalMs));
}
private class RegisterDriverCallback implements RpcResponseCallback {
private final TransportClient client;
private final long heartbeatIntervalMs;
private RegisterDriverCallback(TransportClient client, long heartbeatIntervalMs) {
this.client = client;
this.heartbeatIntervalMs = heartbeatIntervalMs;
}
@Override
public void onSuccess(ByteBuffer response) {
heartbeaterThread.scheduleAtFixedRate(
new Heartbeater(client), 0, heartbeatIntervalMs, TimeUnit.MILLISECONDS);
logger.info("Successfully registered app " + appId + " with external shuffle service.");
}
@Override
public void onFailure(Throwable e) {
logger.warn("Unable to register app " + appId + " with external shuffle service. " +
"Please manually remove shuffle data after driver exit. Error: " + e);
}
}
@Override
public void close() {
heartbeaterThread.shutdownNow();
super.close();
}
private class Heartbeater implements Runnable {
private final TransportClient client;
private Heartbeater(TransportClient client) {
this.client = client;
}
@Override
public void run() {
// TODO: Stop sending heartbeats if the shuffle service has lost the app due to timeout
client.send(new ShuffleServiceHeartbeat(appId).toByteBuffer());
}
}
}
|
