[jira] [Created] (FLINK-3047) Local batch execution: set number of task manager slots to the maximum parallelism

[Shang Yuanchun (Jira)]

Maximilian Michels created FLINK-3047:
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             Summary: Local batch execution: set number of task manager slots to the maximum parallelism
                 Key: FLINK-3047
                 URL: https://issues.apache.org/jira/browse/FLINK-3047
             Project: Flink
          Issue Type: Bug
          Components: Batch, Local Runtime
    Affects Versions: 0.10.0
            Reporter: Maximilian Michels
            Assignee: Maximilian Michels
            Priority: Minor
             Fix For: 1.0.0, 0.10.1


The number of task slots for local execution are determined by the maximum parallelism found. However, if a default parallelism has been set, this parallelism is used as the upper bound for the number of task slots.

We should change this to always use the maximum parallelism as the number of task slots. Otherwise jobs which include operators with a parallelism higher than the default parallelism fail to execute locally.

For example, this fails

{noformat}
ExecutionEnvironment env = ..

env.setParallelism(2);

DataSet<Integer> set = env.fromElements(1,2,3,4)
    .map(el -> el+1)
    .setParallelism(4);

set.print();
{noformat}



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