[BOOKKEEPER-551] Empty Ledger Metadata Leak in Hedwig

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Component/s: hedwig-server
• Assignee: Unassigned
• Reporter: Jiannan Wang
• Created: 20/Jan/13 06:48
• Updated: 16/Mar/16 04:21
• Resolved: 16/Mar/16 04:21

Description

When topic is acquired in BookkeeperPersistenceManager#recoverLastTopicLedgerAndOpenNewOne(), empty ledger is just ignored:

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;
}

So these empty ledgers are leaked since its metadata is not deleted.