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Posted to reviews@iotdb.apache.org by "hongzhi-gao (via GitHub)" <gi...@apache.org> on 2026/10/09 03:08:25 UTC

[PR] Fix duplicate DataRegion scheduling after recovery [iotdb]

hongzhi-gao opened a new pull request, #18803:
URL: https://github.com/apache/iotdb/pull/18803

   ## Description
   
     ### Problem
   
     During DataRegion recovery after a restart, an empty asynchronous recovery task list could still enter the subsequent registration flow. This could register
     the same DataRegion twice for scheduling, causing each TTL check to run twice and producing adjacent duplicate log entries.
   
     ### Changes
   
     - Continue with asynchronous recovery and its registration flow only when the task list is non-empty.
     - Prevent duplicate DataRegion entries during registration.
     - Remove all entries for a DataRegion during unregistration, including duplicates left by earlier registrations.
   
     ### Testing
   
     A temporary integration test started an IoTConsensusV2 node, wrote and flushed data, then restarted the node with its data preserved and checked the TTL
     logs. The temporary test was not added to this PR.
     <hr>
   
     This PR has:
   
     - [x] been tested in a test IoTDB cluster.
     <hr>
   
     ##### Key changed classes in this PR
   
     - StorageEngine: skips the asynchronous recovery flow when there are no tasks.
     - CompactionScheduleTaskManager: deduplicates registration and removes duplicate entries on unregistration.


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Re: [PR] Fix duplicate DataRegion scheduling after recovery [iotdb]

Posted by "jt2594838 (via GitHub)" <gi...@apache.org>.
jt2594838 merged PR #18803:
URL: https://github.com/apache/iotdb/pull/18803


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