apache / apache/fluss

When read from multi-partition table, the flink job currentEmitEventTimeLag is always high

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priority=critical
Dominant language
Java
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Description

### Search before asking

- [x] I searched in the [issues](https://github.com/alibaba/fluss/issues) and found nothing similar.

### Fluss version

0.6.0 (latest release)

### Please describe the bug 🐞

When I try to read from multi-partition table, the flink job currentEmitEventTimeLag is always high:

![Image](https://github.com/user-attachments/assets/7203a3e9-5357-4157-bb95-14fbc2ae145c)

### Solution

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Contributor guide

No contributing guide indexed for this repository

Research direction

Start by reproducing the report against Fluss 0.6.0 with a Flink job reading a multi-partition table, then inspect how currentEmitEventTimeLag behaves across partitions. Compare the observed lag with the expected event-time progress and document a reproducible case and verification criteria for the fix.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
stream-processing
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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