Github user tnachen commented on a diff in the pull request:
https://github.com/apache/spark/pull/13713#discussion_r82695978
--- Diff: docs/running-on-mesos.md ---
@@ -506,8 +506,13 @@ See the [configuration page](configuration.html) for
information on Spark config
since this configuration is just a upper limit and not a guaranteed
amount.
</td>
</tr>
-
-
+<tr>
+ <td><code>spark.mesos.fetchCache.enable</code></td>
+ <td><code>false</code></td>
+ <td>
+ If set to `true`, all URIs in `spark.mesos.uris` will be eligible for
caching by the [Mesos fetch
cache](http://mesos.apache.org/documentation/latest/fetcher/)
--- End diff --
From the implementation you actually set all downloadable URIs (like
spark.executor.uri, jarUrl, etc) to be fetcher cachable. I think we need to be
more explicit here that it's more than just spark.mesos.uris
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