[jira] [Created] (FLINK-31766) Restoring from a retained checkpoint that was generated with changelog backend enabled might fail due to missing files

["Matthias Pohl (Jira)" <ji...@apache.org>]

Matthias Pohl created FLINK-31766:
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             Summary: Restoring from a retained checkpoint that was generated with changelog backend enabled might fail due to missing files
                 Key: FLINK-31766
                 URL: https://issues.apache.org/jira/browse/FLINK-31766
             Project: Flink
          Issue Type: Bug
          Components: Runtime / Coordination
    Affects Versions: 1.16.1, 1.17.0, 1.18.0
            Reporter: Matthias Pohl


in FLINK-31593 we discovered a instability when generating the test data for {{StatefulJobSavepointMigrationITCase}} and {{StatefulJobWBroadcastStateMigrationITCase}}. It appears that files are deleted that shouldn't be deleted (see [~Yanfei Lei]'s [comment in FLINK-31593|https://issues.apache.org/jira/browse/FLINK-31593?focusedCommentId=17706679&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-17706679]).

It's quite reproducible when generating the 1.17 test data for {{StatefulJobWBroadcastStateMigrationITCase}} and doing a test run to verify it.

I'm attaching the debug logs of such two runs that I generated for FLINK-31593 in this issue as well.



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