Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/3687#discussion_r21787328
--- Diff: docs/configuration.md ---
@@ -709,7 +709,9 @@ Apart from these, the following properties are also
available, and may be useful
<td>If set to true, validates the output specification (e.g. checking
if the output directory already exists)
used in saveAsHadoopFile and other variants. This can be disabled to
silence exceptions due to pre-existing
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>
--- End diff --
I am a little uneasy with this approach because its not clean. Ideally
nothing in Spark should refer to the requirements of higher level libraries
like Spark Streaming.
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