Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/18476#discussion_r125038588
--- Diff: docs/configuration.md ---
@@ -1398,6 +1398,15 @@ Apart from these, the following properties are also
available, and may be useful
</td>
</tr>
<tr>
+ <td><code>spark.scheduler.listenerbus.eventqueue.size</code></td>
+ <td>10000</td>
+ <td>
+ Capacity for event queue in Spark listener bus, must be greater than
0. Consider increasing
+ value (e.g. 20000) if listener events are dropped, because of the rate
at which tasks are being
--- End diff --
we may want to add a comment about increasing this will use more memory.
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