hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2645) HLog writer can do 1-2 sync operations after lease has been recovered for split process.
Date Tue, 24 Aug 2010 23:15:24 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12902144#action_12902144
] 

Jean-Daniel Cryans commented on HBASE-2645:
-------------------------------------------

Are we actually going to have this in time for 0.90? If not, punt?

> HLog writer can do 1-2 sync operations after lease has been recovered for split process.
> ----------------------------------------------------------------------------------------
>
>                 Key: HBASE-2645
>                 URL: https://issues.apache.org/jira/browse/HBASE-2645
>             Project: HBase
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.90.0
>            Reporter: Cosmin Lehene
>            Assignee: Todd Lipcon
>            Priority: Blocker
>             Fix For: 0.90.0
>
>
> TestHLogSplit.testLogCannotBeWrittenOnceParsed is failing. 
> This test starts a thread that writes one edit to the log, syncs and counts. During this,
a HLog.splitLog operation is started. splitLog recovers the log lease before reading the log,
so that the original regionserver could not wake up and write after the split process started.
 
> The test compares the number of edits reported by the split process and by the writer
thread. Writer thread (called zombie in the test) should report <=  than the splitLog (sync()
might raise after the last edit gets written and the edit won't get counted by zombie thread).
However it appears that the zombie counts 1-2 more edits. So it looks like it can sync without
a lease.
> This might be a hdfs-0.20 related issue. 

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message