[IGNITE-21765] Java thin 3.0: DataStreamer partition awareness might break if assignment is not available at the moment

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0-beta1
• Fix Version/s: 3.0
• Component/s: streaming, thin client
• Labels: ignite-3
• Assignee: Pavel Tupitsyn
• Reporter: Pavel Tupitsyn
• Reviewer: Igor Sapego
• Created: 15/Mar/24 11:47
• Updated: 04/Sep/24 16:07
• Resolved: 02/Apr/24 10:58

Description

• ClientTable.getPartitionAssignment might return an empty list
• AbstractClientStreamerPartitionAwarenessProvider assumes that partition count can't change

Therefore, if some server node lags behind and returns an empty assignment for a given timestamp, streamer partition awareness won't work at all.

Potential Fixes

• Wait for assignment on the server, do not return empty/null - might affect performance
• Return correct partition count, but null values - faster and simpler

Issue Links

• links to: GitHub Pull Request #3538