Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/1392#discussion_r45580214
--- Diff: flink-java/src/main/java/org/apache/flink/api/java/DataSet.java
---
@@ -1343,10 +1343,34 @@ public long count() throws Exception {
//
--------------------------------------------------------------------------------------------
/**
- * Writes a DataSet as a text file to the specified location.<br>
- * For each element of the DataSet the result of {@link
Object#toString()} is written.
+ * Writes a DataSet as text file(s) to the specified location.<br>
+ * For each element of the DataSet the result of {@link
Object#toString()} is written.<br/>
+ * <br/>
+ * <span class="strong">How it writes DataSet</span><br/>
+ * A single file is written when
+ * <ul>
+ * <li>parallelism is set to 1</li>
+ * <li>or <a
href="https://ci.apache.org/projects/flink/flink-docs-master/setup/config.html#file-systems";>fs.output.always-create-directory</a>
is set to true in flink-conf.yaml file</li>
--- End diff --
This should probably mean "when it is set to `false`", no?
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