[ https://issues.apache.org/jira/browse/FLINK-25872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17530927#comment-17530927 ]
Piotr Nowojski edited comment on FLINK-25872 at 5/2/22 7:47 PM: ---------------------------------------------------------------- [~dwysakowicz] raised a good point. Do we really need a support for the switch in this direction: changelog off -> on? This seems like a planned use case, so it should be fine if savepoint takes more time. The other direction might be in order to avoid some infinite bug loops, so on -> off support from checkpoint makes more sense to me. was (Author: pnowojski): I would second [~dwysakowicz] concerns if we really need a support for the switch in this direction: changelog off -> on. This seems like a planned use case, so it should be fine if savepoint takes more time. The other direction might be in order to avoid some infinite bug loops, so on -> off support from checkpoint makes more sense to me. > Restoring from non-changelog checkpoint with changelog state-backend enabled > in CLAIM mode discards state in use > ---------------------------------------------------------------------------------------------------------------- > > Key: FLINK-25872 > URL: https://issues.apache.org/jira/browse/FLINK-25872 > Project: Flink > Issue Type: Bug > Components: Runtime / Checkpointing, Runtime / State Backends > Reporter: Yun Tang > Assignee: Yanfei Lei > Priority: Major > Labels: pull-request-available > Fix For: 1.16.0 > > > If we restore from checkpoint with changelog state-backend enabled in > snapshot CLAIM mode, the restored checkpoint would be discarded on subsume. > This invalidates newer/active checkpoints because their materialized part is > discarded (for incremental wrapped checkpoints, their private state is > discarded). This bug is like FLINK-25478. > > Design doc: > [https://docs.google.com/document/d/1KSFWc0gL7HkhC-JNrnsp06TLnsTmZOTHITQDcGMo0cI/edit?usp=sharing,] -- This message was sent by Atlassian Jira (v8.20.7#820007)