hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mikhail Antonov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11109) flush region sequence id may not be larger than all edits flushed
Date Sun, 04 May 2014 04:43:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13988909#comment-13988909
] 

Mikhail Antonov commented on HBASE-11109:
-----------------------------------------

bq. hadoopqa is gone? retry
Probably. I tried cancelling/resubmitting consensus patches multiples time over past few days,
didn't get any builds kicked in..

> flush region sequence id may not be larger than all edits flushed
> -----------------------------------------------------------------
>
>                 Key: HBASE-11109
>                 URL: https://issues.apache.org/jira/browse/HBASE-11109
>             Project: HBase
>          Issue Type: Sub-task
>          Components: wal
>    Affects Versions: 0.99.0
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.99.0
>
>         Attachments: 11109.txt, 11109v2.txt, 11109v2.txt
>
>
> This was found by [~jeffreyz]  See parent issue.  We have this issue since we put the
ring buffer/disrupter into the WAL (HBASE-10156).
> An edits region sequence id is set only after the edit has traversed the ring buffer.
 Flushing, we just up whatever the current region sequence id is.  Crossing the ring buffer
may take some time and is done by background threads.  The flusher may be taking the region
sequence id though edits have not yet made it across the ringbuffer: i.e. edits that are actually
scoped by the flush may have region sequence ids in excess of that of the flush sequence id
reported.
> The consequences are not exactly clear.  Would rather not have to find out so lets fix
this here.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message