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
124
125
126
127
128
129
130
131
132
133
134
|
/*
* 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
import java.util.Properties
import scala.collection.mutable.ArrayBuffer
import org.apache.spark.executor.TaskMetrics
import org.apache.spark.internal.Logging
import org.apache.spark.memory.TaskMemoryManager
import org.apache.spark.metrics.MetricsSystem
import org.apache.spark.metrics.source.Source
import org.apache.spark.util._
private[spark] class TaskContextImpl(
val stageId: Int,
val partitionId: Int,
override val taskAttemptId: Long,
override val attemptNumber: Int,
override val taskMemoryManager: TaskMemoryManager,
localProperties: Properties,
@transient private val metricsSystem: MetricsSystem,
initialAccumulators: Seq[Accumulator[_]] = InternalAccumulator.createAll())
extends TaskContext
with Logging {
/**
* Metrics associated with this task.
*/
override val taskMetrics: TaskMetrics = new TaskMetrics(initialAccumulators)
/** List of callback functions to execute when the task completes. */
@transient private val onCompleteCallbacks = new ArrayBuffer[TaskCompletionListener]
/** List of callback functions to execute when the task fails. */
@transient private val onFailureCallbacks = new ArrayBuffer[TaskFailureListener]
// Whether the corresponding task has been killed.
@volatile private var interrupted: Boolean = false
// Whether the task has completed.
@volatile private var completed: Boolean = false
// Whether the task has failed.
@volatile private var failed: Boolean = false
override def addJavaFriendlyTaskCompletionListener(
listener: TaskCompletionListener): this.type = {
onCompleteCallbacks += listener
this
}
override def addJavaFriendlyTaskFailureListener(listener: TaskFailureListener): this.type = {
onFailureCallbacks += listener
this
}
/** Marks the task as failed and triggers the failure listeners. */
private[spark] def markTaskFailed(error: Throwable): Unit = {
// failure callbacks should only be called once
if (failed) return
failed = true
val errorMsgs = new ArrayBuffer[String](2)
// Process failure callbacks in the reverse order of registration
onFailureCallbacks.reverse.foreach { listener =>
try {
listener.onTaskFailure(this, error)
} catch {
case e: Throwable =>
errorMsgs += e.getMessage
logError("Error in TaskFailureListener", e)
}
}
if (errorMsgs.nonEmpty) {
throw new TaskCompletionListenerException(errorMsgs, Option(error))
}
}
/** Marks the task as completed and triggers the completion listeners. */
private[spark] def markTaskCompleted(): Unit = {
completed = true
val errorMsgs = new ArrayBuffer[String](2)
// Process complete callbacks in the reverse order of registration
onCompleteCallbacks.reverse.foreach { listener =>
try {
listener.onTaskCompletion(this)
} catch {
case e: Throwable =>
errorMsgs += e.getMessage
logError("Error in TaskCompletionListener", e)
}
}
if (errorMsgs.nonEmpty) {
throw new TaskCompletionListenerException(errorMsgs)
}
}
/** Marks the task for interruption, i.e. cancellation. */
private[spark] def markInterrupted(): Unit = {
interrupted = true
}
override def isCompleted(): Boolean = completed
override def isRunningLocally(): Boolean = false
override def isInterrupted(): Boolean = interrupted
override def getLocalProperty(key: String): String = localProperties.getProperty(key)
override def getMetricsSources(sourceName: String): Seq[Source] =
metricsSystem.getSourcesByName(sourceName)
private[spark] override def registerAccumulator(a: Accumulable[_, _]): Unit = {
taskMetrics.registerAccumulator(a)
}
}
|
