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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2017/06/03 17:51:04 UTC
[jira] [Commented] (HBASE-16025) Cache table state to reduce load
on META
[ https://issues.apache.org/jira/browse/HBASE-16025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16036026#comment-16036026 ]
stack commented on HBASE-16025:
-------------------------------
AMv2 has table state in hbase:meta so I presume we have this issue still; to be confirmed. We should do as Gary suggests anyways.
> Cache table state to reduce load on META
> ----------------------------------------
>
> Key: HBASE-16025
> URL: https://issues.apache.org/jira/browse/HBASE-16025
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Reporter: Gary Helmling
> Assignee: Gary Helmling
> Priority: Blocker
> Fix For: 2.0.0
>
>
> HBASE-12035 moved keeping table enabled/disabled state from ZooKeeper into hbase:meta. When we retry operations on the client, we check table state in order to return a specific message if the table is disabled. This means that in master we will be going back to meta for every retry, even if a region's location has not changed. This is going to cause performance issues when a cluster is already loaded, ie. in cases where regionservers may be returning CallQueueTooBigException.
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