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

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 0.10.0
• Fix Version/s: 0.10.1, 1.0.0
• Component/s: API / DataSet, Runtime / Task
• Assignee: Maximilian Michels
• Reporter: Maximilian Michels
• Created: 19/Nov/15 11:17
• Updated: 16/Jun/16 17:04
• Resolved: 19/Nov/15 11:46

Description

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

ExecutionEnvironment env = ..

env.setParallelism(2);

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

set.print();

Issue Links

• is related to: FLINK-3020 Local streaming execution: set number of task manager slots to the maximum parallelism