Github user pwendell commented on a diff in the pull request:
https://github.com/apache/spark/pull/1056#discussion_r15272172
--- Diff: docs/configuration.md ---
@@ -502,6 +502,13 @@ Apart from these, the following properties are also
available, and may be useful
output directories. We recommend that users do not disable this except
if trying to achieve compatibility with
previous versions of Spark. Simply use Hadoop's FileSystem API to
delete output directories by hand.</td>
</tr>
+<tr>
+ <td>spark.executor.heartbeatInterval</td>
+ <td>2000</td>
+ <td>Interval (milliseconds) between each executor's heartbeats to the
driver. Heartbeats let
+ the driver that the executor is still alive and update it with metrics
for in-progress tasks.
--- End diff --
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