[jira] [Created] (HDDS-13927) Recon - OM Db delta updates handler resource cleanup

["Devesh Kumar Singh (Jira)" <ji...@apache.org>]

Devesh Kumar Singh created HDDS-13927:
-----------------------------------------

             Summary: Recon - OM Db delta updates handler resource cleanup
                 Key: HDDS-13927
                 URL: https://issues.apache.org/jira/browse/HDDS-13927
             Project: Apache Ozone
          Issue Type: Task
          Components: Ozone Recon
    Affects Versions: 2.0.0
            Reporter: Devesh Kumar Singh
            Assignee: Devesh Kumar Singh


h2. *Specific Failure Scenarios When OMDbUpdatesHandler could still hold some references*
h3. *Scenario 1: Exception During Batch Processing*

try (OMDBUpdatesHandler omdbUpdatesHandler = new OMDBUpdatesHandler(omMetadataManager)) {

    for (byte[] data : dbUpdates.getData()) {

        try (ManagedWriteBatch writeBatch = new ManagedWriteBatch(data)) {

            writeBatch.iterate(omdbUpdatesHandler);  // Handler stores references to RocksDB objects

            

            // EXCEPTION OCCURS HERE (e.g., RocksDBException during commit)

            rdbBatchOperation.commit(rocksDB, wOpts);  

            

        } // writeBatch.close() called, but omdbUpdatesHandler still holds references!

    }

} // omdbUpdatesHandler "close" called, but it's a no-op since no close() method exists

 

*Result:* RocksDB handles, iterators, and memory remain allocated indefinitely.
h3. *Scenario 2: Interrupted Thread*

try (OMDBUpdatesHandler omdbUpdatesHandler = new OMDBUpdatesHandler(omMetadataManager)) {

    // Thread gets interrupted during long-running operation

    if (Thread.currentThread().isInterrupted()) {

        throw new InterruptedException("Thread interrupted during delta update.");

    }

    // omdbUpdatesHandler has already accessed tables and created internal resources

    // Interrupt causes immediate exit without proper cleanup

}



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