[jira] [Created] (BOOKKEEPER-551) Empty Ledger Metadata Leak in Hedwig

["Jiannan Wang (JIRA)" <ji...@apache.org>]

Jiannan Wang created BOOKKEEPER-551:
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             Summary: Empty Ledger Metadata Leak in Hedwig
                 Key: BOOKKEEPER-551
                 URL: https://issues.apache.org/jira/browse/BOOKKEEPER-551
             Project: Bookkeeper
          Issue Type: Bug
          Components: hedwig-server
            Reporter: Jiannan Wang
            Assignee: Jiannan Wang
             Fix For: 4.3.0


When topic is acquired in BookkeeperPersistenceManager#recoverLastTopicLedgerAndOpenNewOne(), empty ledger is just ignored:
{code:java}
if (numEntriesInLastLedger <= 0) {
    // this was an empty ledger that someone created but
    // couldn't write to, so just ignore it
    logger.info("Pruning empty ledger: " + ledgerId + " for topic: " + topic.toStringUtf8());
    closeLedger(ledgerHandle);
    openNewTopicLedger(topic, expectedVersionOfLedgerNode, topicInfo,
                       expectedStartSeqId, false, cb, ctx);
    return;
}
{code}
So these empty ledgers are leaked since its metadata is not deleted.

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