[FLINK-20918] Avoid excessive flush of Hadoop output stream

• Type: Bug
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.11.3, 1.12.0
• Component/s: Connectors / Hadoop Compatibility, FileSystems
• Labels: auto-deprioritized-major auto-deprioritized-minor pull-request-available
• Assignee: Unassigned
• Reporter: Paul Lin
• Created: 11/Jan/21 03:28
• Updated: 15/Apr/22 22:38

Description

HadoopRecoverableFsDataOutputStream#sync calls both `hflush` and `hsync`, whereas `hsync` is an enhanced version of `hflush`. We should remove the `hflush` call to avoid the excessive flush.

Issue Links

• links to: GitHub Pull Request #14670