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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/09/01 09:36:07 UTC
[jira] [Created] (HDFS-3884) QJM: Journal format() should reset
cached values
Todd Lipcon created HDFS-3884:
---------------------------------
Summary: QJM: Journal format() should reset cached values
Key: HDFS-3884
URL: https://issues.apache.org/jira/browse/HDFS-3884
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: QuorumJournalManager (HDFS-3077)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Fix For: QuorumJournalManager (HDFS-3077)
Attachments: hdfs-3884.txt
Simple bug in the JournalNode: it caches certain values (eg accepted epoch) in memory, and the cached values aren't reset when the journal is formatted. So, after a format, further calls to the same Journal will see the old value for accepted epoch, writer epoch, etc, preventing the journal from being re-used until the JN is restarted.
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[jira] [Resolved] (HDFS-3884) QJM: Journal format() should reset
cached values
Posted by "Todd Lipcon (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-3884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon resolved HDFS-3884.
-------------------------------
Resolution: Fixed
Target Version/s: QuorumJournalManager (HDFS-3077)
Hadoop Flags: Reviewed
committed to branch, thx for reviews.
> QJM: Journal format() should reset cached values
> ------------------------------------------------
>
> Key: HDFS-3884
> URL: https://issues.apache.org/jira/browse/HDFS-3884
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Fix For: QuorumJournalManager (HDFS-3077)
>
> Attachments: hdfs-3884.txt, hdfs-3884.txt, hdfs-3884.txt
>
>
> Simple bug in the JournalNode: it caches certain values (eg accepted epoch) in memory, and the cached values aren't reset when the journal is formatted. So, after a format, further calls to the same Journal will see the old value for accepted epoch, writer epoch, etc, preventing the journal from being re-used until the JN is restarted.
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