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
|
package org.apache.spark.scheduler.cluster
/*
* 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.
*/
import org.apache.spark.{Logging, SparkContext}
import org.apache.hadoop.conf.Configuration
import org.apache.hadoop.fs.{Path, FileSystem}
private[spark] class SimrSchedulerBackend(
scheduler: ClusterScheduler,
sc: SparkContext,
driverFilePath: String)
extends CoarseGrainedSchedulerBackend(scheduler, sc.env.actorSystem)
with Logging {
val tmpPath = new Path(driverFilePath + "_tmp");
val filePath = new Path(driverFilePath);
val maxCores = System.getProperty("spark.simr.executor.cores", "1").toInt
override def start() {
super.start()
val driverUrl = "akka://spark@%s:%s/user/%s".format(
System.getProperty("spark.driver.host"), System.getProperty("spark.driver.port"),
CoarseGrainedSchedulerBackend.ACTOR_NAME)
val conf = new Configuration()
val fs = FileSystem.get(conf)
logInfo("Writing to HDFS file: " + driverFilePath);
logInfo("Writing AKKA address: " + driverUrl);
// Create temporary file to prevent race condition where executors get empty driverUrl file
val temp = fs.create(tmpPath, true)
temp.writeUTF(driverUrl)
temp.writeInt(maxCores)
temp.close()
// "Atomic" rename
fs.rename(tmpPath, filePath);
}
override def stop() {
val conf = new Configuration()
val fs = FileSystem.get(conf)
fs.delete(new Path(driverFilePath), false);
super.stopExecutors()
super.stop()
}
}
|
