[FLINK-29567] Revert sink output metric names from numRecordsSend back to numRecordsOut

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 1.16.0, 1.15.3
• Fix Version/s: 1.16.0, 1.15.3
• Component/s: Connectors / Common
• Labels: pull-request-available
• Assignee: Qingsheng Ren
• Reporter: Qingsheng Ren
• Created: 10/Oct/22 12:26
• Updated: 03/Nov/22 02:24
• Resolved: 20/Oct/22 01:12

Description

As discussed in the mailing list, all sink metrics with name “numXXXOut” defined in FLIP-33 are replace by “numXXXSend” in FLINK-26126 and FLINK-26492.

Considering metric names are public APIs, this is a breaking change to end users and not backward compatible. We need to revert these metric names back. 

Issue Links

• links to: GitHub Pull Request #21065
• links to: GitHub Pull Request #21220