[BEAM-7450] Support unbounded reads with HCatalogIO

• Type: New Feature
• Status: Triage Needed
• Priority: P3
• Resolution: Fixed
• Fix Version/s: 2.14.0
• Component/s: io-java-hcatalog
• Assignee: Ankit Jhalaria
• Reporter: Ankit Jhalaria
• Created: 29/May/19 20:22
• Updated: 13/Apr/23 10:56
• Resolved: 14/Jun/19 20:31

Description

1. Current version of HcatalogIO is a bounded source.
2. While migrating our jobs to aws, we realized that it would be helpful to have an unbounded hcat reader that can behave as an unbounded source and polls for new partitions as and when they become available.
3. I have used splittable pardo(s) to do this. There is a flag that can be set to treat this as a bounded source which will terminate if that flag is set.

Issue Links

• relates to: BEAM-727 KafkaIO should support dynamic addition of Kafka partitions to assigned topics.
• links to: GitHub Pull Request #8718