You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@phoenix.apache.org by "James Taylor (JIRA)" <ji...@apache.org> on 2017/09/25 18:05:00 UTC
[jira] [Assigned] (PHOENIX-4214) Scans which write should not block
region split or close
[ https://issues.apache.org/jira/browse/PHOENIX-4214?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
James Taylor reassigned PHOENIX-4214:
-------------------------------------
Assignee: Vincent Poon
> Scans which write should not block region split or close
> --------------------------------------------------------
>
> Key: PHOENIX-4214
> URL: https://issues.apache.org/jira/browse/PHOENIX-4214
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.12.0
> Reporter: Vincent Poon
> Assignee: Vincent Poon
> Attachments: PHOENIX-4214.master.v1.patch, splitDuringUpsertSelect_wip.patch
>
>
> PHOENIX-3111 introduced a scan reference counter which is checked during region preSplit and preClose. However, a steady stream of UPSERT SELECT or DELETE can keep the count above 0 indefinitely, preventing or greatly delaying a region split or close.
> We should try to avoid starvation of the split / close request, and fail/reject queries where appropriate.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)