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https://issues.apache.org/jira/browse/FLINK-33466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17783896#comment-17783896
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Jonas Weile edited comment on FLINK-33466 at 11/8/23 6:49 AM:
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See the following issues for the same problem:
FLINK-31006
FLINK-29674
It seems, that the two possible solutions are as follows:
1. Either the sources must signal the NoMoreSplitsEvent again after restoring
from a snapshot or
2. the SourceReaderBase should snapshot the noMoreSplitsAssignment variable.
Which approach would be most viable?
was (Author: JIRAUSER302117):
See the following issues for the same problem:
FLINK-31006
FLINK-29674 Apache Kafka Connector‘s “ setBounded” not valid - ASF Jira
It seems, that the two possible solutions are as follows:
1. Either the sources must signal the NoMoreSplitsEvent again after restoring
from a snapshot or
2. the SourceReaderBase should snapshot the noMoreSplitsAssignment variable.
Which approach would be most viable?
> Bounded Kafka source never finishes after restore from savepoint
> ----------------------------------------------------------------
>
> Key: FLINK-33466
> URL: https://issues.apache.org/jira/browse/FLINK-33466
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Common
> Affects Versions: 1.17.1
> Reporter: Jonas Weile
> Priority: Major
>
> When setting up a bounded Kafka source, if the job is restored from a
> savepoint before the source has finished, then the Kafka source will never
> transition to a finished state.
> This seems to be because the noMoreSplitsAssignment variable in the
> SourceReaderBase class is not snapshotted. Therefore, after restoring from a
> checkpoint/savepoint, the noMoreSplitsAssignment variable will default to
> false, and the first condition in the private helper method
> finishedOrAvailableLater() in the SourceReaderBase class will always evaluate
> to true.
> Since this originates in the base class, the problem should hold for all
> source types, not just kafka.
>
> Would it make sense to snapshot the noMoreSplitsAssigntments variable?
> I would love to take this on as a first task if appropriate.
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