[FLINK-9026] Unregister finished tasks from TaskManagerMetricGroup and close it

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.5.0, 1.6.0
• Fix Version/s: 1.5.0
• Component/s: Runtime / Metrics
• Labels: flip-6
• Assignee: Sihua Zhou
• Reporter: Till Rohrmann
• Created: 19/Mar/18 16:55
• Updated: 28/Mar/18 14:23
• Resolved: 28/Mar/18 14:22

Description

We should unregister Tasks from the TaskManagerMetricGroup when they have reached a final state. Moreover, we should close the TaskManagerMetricGroup either in the TaskExecutor#postStop method or let the caller do this.

Issue Links

• links to: GitHub Pull Request #5734