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Posted to issues@hbase.apache.org by "Ashu Pachauri (JIRA)" <ji...@apache.org> on 2016/11/30 02:19:58 UTC

[jira] [Updated] (HBASE-17202) Master takes a long time to initialize

     [ https://issues.apache.org/jira/browse/HBASE-17202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ashu Pachauri updated HBASE-17202:
----------------------------------
    Description: 
On master failover or a full cluster restart, we create the RegionLocationFinder cache by calculating block locations for every region; this cache is used by the balancer for calculating region locality. This greatly increases the time it takes for the assignment manager to start and affects region availability in scenarios of full cluster restart.

We should initialize assignment manager with the bare minimum information and asynchronously load the block location cache.

  was:
On master failover or a full cluster restart, we create the RegionLocationFinder cache by calculating block locations for every region used by the balancer. This greatly increases the time it takes for the assignment manager to start and affects region availability in scenarios of full cluster restart.

We should initialize assignment manager with the bare minimum information and asynchronously load the block location cache.


> Master takes a long time to initialize
> --------------------------------------
>
>                 Key: HBASE-17202
>                 URL: https://issues.apache.org/jira/browse/HBASE-17202
>             Project: HBase
>          Issue Type: Improvement
>          Components: Balancer, master
>            Reporter: Ashu Pachauri
>            Assignee: Ashu Pachauri
>
> On master failover or a full cluster restart, we create the RegionLocationFinder cache by calculating block locations for every region; this cache is used by the balancer for calculating region locality. This greatly increases the time it takes for the assignment manager to start and affects region availability in scenarios of full cluster restart.
> We should initialize assignment manager with the bare minimum information and asynchronously load the block location cache.



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