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From: tillrohrmann <git@git.apache.org>
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Subject: [GitHub] flink pull request: [FLINK-3020][streaming] set number of
 task slo...
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Message-Id: <20151119110618.5C42FE0A83@git1-us-west.apache.org>
Date: Thu, 19 Nov 2015 11:06:18 +0000 (UTC)

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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