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-rw-r--r--docs/configuration.md3
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/configuration.md b/docs/configuration.md
index aa201c6b6a..d8800e93da 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -590,7 +590,8 @@ Apart from these, the following properties are also available, and may be useful
<td><code>spark.io.encryption.enabled</code></td>
<td>false</td>
<td>
- Enable IO encryption. Only supported in YARN mode.
+ Enable IO encryption. Currently supported by all modes except Mesos. It's recommended that RPC encryption
+ be enabled when using this feature.
</td>
</tr>
<tr>