Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/1360#discussion_r45327211
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/LocalStreamEnvironment.java
---
@@ -91,7 +91,11 @@ public JobExecutionResult execute(String jobName) throws
Exception {
configuration.addAll(jobGraph.getJobConfiguration());
configuration.setLong(ConfigConstants.TASK_MANAGER_MEMORY_SIZE_KEY, -1L);
-
configuration.setInteger(ConfigConstants.TASK_MANAGER_NUM_TASK_SLOTS,
getParallelism());
+
+ int parallelism = getParallelism() == defaultLocalParallelism ?
+ defaultLocalParallelism :
jobGraph.getMaximumParallelism();
--- End diff --
`defaultLocalParallelism` seems to be the number of available processors. I
think this is very unintuitive that the default parallelism is only taken if it
equals the number of processors.
This means in case of an operator with a higher dop than the #cores, the
program will only fail if the user sets the default parallelism to #cores.
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