[FLINK-27789] LegacySource compatible with overdraft buffer

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.16.0
• Component/s: Connectors / Common, Runtime / Checkpointing, Runtime / Network
• Labels: pull-request-available
• Assignee: Rui Fan
• Reporter: Rui Fan
• Created: 26/May/22 01:58
• Updated: 29/Jun/22 14:36
• Resolved: 29/Jun/22 14:04

Description

Since LegacySource does not have checkAvailable, LegacySource will use all overdraft buffers by default, this is not what we expected.

So we'll set overdraft=0 for the SourceStreamTask.

Issue Links

• links to: GitHub Pull Request #20075