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Posted to hdfs-dev@hadoop.apache.org by "Uma Maheswara Rao G (JIRA)" <ji...@apache.org> on 2012/06/25 18:10:44 UTC
[jira] [Resolved] (HDFS-3464) BKJM: Deleting currentLedger and
leaving 'inprogress_x' on exceptions can throw
BKNoSuchLedgerExistsException later.
[ https://issues.apache.org/jira/browse/HDFS-3464?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Uma Maheswara Rao G resolved HDFS-3464.
---------------------------------------
Resolution: Fixed
> BKJM: Deleting currentLedger and leaving 'inprogress_x' on exceptions can throw BKNoSuchLedgerExistsException later.
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-3464
> URL: https://issues.apache.org/jira/browse/HDFS-3464
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: 2.0.1-alpha, 3.0.0
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
>
> HDFS-3058 will clean currentLedgers on exception.
> In BookKeeperJournalManager, startLogSegment() is deleting the corresponding 'inprogress_ledger' ledger on exception. Here leaving the 'inprogress_x' ledger metadata in ZooKeeper. When the other node becomes active, he will see the 'inprogress_x' znode and tries to recoverLastTxId() it would throw exception, since there is no 'inprogress_ledger' exists.
> {noformat}
> Caused by: org.apache.bookkeeper.client.BKException$BKNoSuchLedgerExistsException
> at org.apache.bookkeeper.client.BookKeeper.openLedger(BookKeeper.java:393)
> at org.apache.hadoop.contrib.bkjournal.BookKeeperJournalManager.recoverLastTxId(BookKeeperJournalManager.java:493)
> {noformat}
> As per the discussion in HDFS-3058, we will handle the coment as part of this JIRA.
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