[SPARK-34187][SS][3.0] Use available offset range obtained during polling when checking offset validation #31328
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
dongjoon-hyun
approved these changes
Jan 25, 2021
dongjoon-hyun
pushed a commit
that referenced
this pull request
Jan 25, 2021
…ling when checking offset validation ### What changes were proposed in this pull request? This patch uses the available offset range obtained during polling Kafka records to do offset validation check. ### Why are the changes needed? We support non-consecutive offsets for Kafka since 2.4.0. In `fetchRecord`, we do offset validation by checking if the offset is in available offset range. But currently we obtain latest available offset range to do the check. It looks not correct as the available offset range could be changed during the batch, so the available offset range is different than the one when we polling the records from Kafka. It is possible that an offset is valid when polling, but at the time we do the above check, it is out of latest available offset range. We will wrongly consider it as data loss case and fail the query or drop the record. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? This should pass existing unit tests. This is hard to have unit test as the Kafka producer and the consumer is asynchronous. Further, we also need to make the offset out of new available offset range. Closes #31328 from viirya/SPARK-34187-3.0. Authored-by: Liang-Chi Hsieh <viirya@gmail.com> Signed-off-by: Dongjoon Hyun <dhyun@apple.com>
|
Test build #134458 has finished for PR 31328 at commit
|
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
What changes were proposed in this pull request?
This patch uses the available offset range obtained during polling Kafka records to do offset validation check.
Why are the changes needed?
We support non-consecutive offsets for Kafka since 2.4.0. In
fetchRecord, we do offset validation by checking if the offset is in available offset range. But currently we obtain latest available offset range to do the check. It looks not correct as the available offset range could be changed during the batch, so the available offset range is different than the one when we polling the records from Kafka.It is possible that an offset is valid when polling, but at the time we do the above check, it is out of latest available offset range. We will wrongly consider it as data loss case and fail the query or drop the record.
Does this PR introduce any user-facing change?
No
How was this patch tested?
This should pass existing unit tests.
This is hard to have unit test as the Kafka producer and the consumer is asynchronous. Further, we also need to make the offset out of new available offset range.