[SPARK-25449] Don't send zero accumulators in heartbeats

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 3.0.0
• Component/s: Spark Core
• Assignee: Mukul Murthy
• Reporter: Mukul Murthy
• Created: 17/Sep/18 21:31
• Updated: 08/Jun/20 17:33
• Resolved: 28/Sep/18 23:34

Description

Heartbeats sent from executors to the driver every 10 seconds contain metrics and are generally on the order of a few KBs. However, for large jobs with lots of tasks, heartbeats can be on the order of tens of MBs, causing tasks to die with heartbeat failures. We can mitigate this by not sending zero metrics to the driver.

Issue Links

• links to: [Github] Pull Request #22473 (mukulmurthy)