Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/10078#discussion_r46600227
--- Diff: docs/configuration.md ---
@@ -647,10 +647,10 @@ Apart from these, the following properties are also
available, and may be useful
<td><code>spark.kryo.registrator</code></td>
<td>(none)</td>
<td>
- If you use Kryo serialization, set this class to register your custom
classes with Kryo. This
+ If you use Kryo serialization, give a comma-separated list of classes
that register your custom classes with Kryo. This
property is useful if you need to register your classes in a custom
way, e.g. to specify a custom
field serializer. Otherwise <code>spark.kryo.classesToRegister</code>
is simpler. It should be
- set to a class that extends
+ set to classes that extends
--- End diff --
"classes that extend"
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