Github user StephanEwen commented on a diff in the pull request:
https://github.com/apache/flink/pull/896#discussion_r34271710
--- Diff:
flink-examples/flink-java-examples/src/main/java/org/apache/flink/examples/java/wordcount/WordCount.java
---
@@ -60,6 +60,7 @@ public static void main(String[] args) throws Exception {
// set up the execution environment
final ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
+ env.setParallelism(1);
--- End diff --
Probably the reason that the YARN tests are broken...
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