From def7c265f539f3e119f068b6e9050300d05b14a4 Mon Sep 17 00:00:00 2001
From: Jagadeesan <as2@us.ibm.com>
Date: Wed, 14 Sep 2016 09:03:16 +0100
Subject: [PATCH] =?UTF-8?q?[SPARK-17449][DOCUMENTATION]=20Relation=20betwe?=
=?UTF-8?q?en=20heartbeatInterval=20and=E2=80=A6?=
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## What changes were proposed in this pull request?
The relation between spark.network.timeout and spark.executor.heartbeatInterval should be mentioned in the document.
… network timeout]
Author: Jagadeesan <as2@us.ibm.com>
Closes #15042 from jagadeesanas2/SPARK-17449.
---
core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala | 1 +
docs/configuration.md | 3 ++-
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala b/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
index c3764ac671..5242ab6f55 100644
--- a/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
+++ b/core/src/main/scala/org/apache/spark/HeartbeatReceiver.scala
@@ -32,6 +32,7 @@ import org.apache.spark.util._
* A heartbeat from executors to the driver. This is a shared message used by several internal
* components to convey liveness or execution information for in-progress tasks. It will also
* expire the hosts that have not heartbeated for more than spark.network.timeout.
+ * spark.executor.heartbeatInterval should be significantly less than spark.network.timeout.
*/
private[spark] case class Heartbeat(
executorId: String,
diff --git a/docs/configuration.md b/docs/configuration.md
index ebd0aa796d..8aea74505e 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -987,7 +987,8 @@ Apart from these, the following properties are also available, and may be useful
<td>10s</td>
<td>Interval between each executor's heartbeats to the driver. Heartbeats let
the driver know that the executor is still alive and update it with metrics for in-progress
- tasks.</td>
+ tasks. spark.executor.heartbeatInterval should be significantly less than
+ spark.network.timeout</td>
</tr>
<tr>
<td><code>spark.files.fetchTimeout</code></td>
--
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