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https://issues.apache.org/jira/browse/HBASE-14614?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15966394#comment-15966394
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stack commented on HBASE-14614:
-------------------------------

Ok. All these tests pass locally. There is an outstanding issue where we trip a 
stuck region assign. It is hard to reproduce. It currently is in the way of my 
getting a good run up on a cluster. This could explain some of the failures 
seen here. Will keep working on it.

Meantime, let me work on trying to cut up this patch into smaller pieces. Will 
need reviews on core. Let me also work on doc. and description of what this 
patch contains. The current changeset  comment has gone stale.

> Procedure v2: Core Assignment Manager
> -------------------------------------
>
>                 Key: HBASE-14614
>                 URL: https://issues.apache.org/jira/browse/HBASE-14614
>             Project: HBase
>          Issue Type: Sub-task
>          Components: proc-v2
>    Affects Versions: 2.0.0
>            Reporter: Stephen Yuan Jiang
>            Assignee: Matteo Bertozzi
>             Fix For: 2.0.0
>
>         Attachments: HBASE-14614.master.003.patch, 
> HBASE-14614.master.004.patch, HBASE-14614.master.005.patch, 
> HBASE-14614.master.006.patch, HBASE-14614.master.007.patch, 
> HBASE-14614.master.008.patch, HBASE-14614.master.009.patch, 
> HBASE-14614.master.010.patch, HBASE-14614.master.011.patch, 
> HBASE-14614.master.012.patch, HBASE-14614.master.012.patch, 
> HBASE-14614.master.013.patch, HBASE-14614.master.014.patch, 
> HBASE-14614.master.015.patch, HBASE-14614.master.017.patch, 
> HBASE-14614.master.018.patch, HBASE-14614.master.019.patch, 
> HBASE-14614.master.020.patch, HBASE-14614.master.021.patch, 
> HBASE-14614.master.022.patch, HBASE-14614.master.023.patch, 
> HBASE-14614.master.024.patch, HBASE-14614.master.025.patch, 
> HBASE-14614.master.026.patch, HBASE-14614.master.027.patch, 
> HBASE-14614.master.028.patch, HBASE-14614.master.029.patch, 
> HBASE-14614.master.030.patch, HBASE-14614.master.031.patch, 
> HBASE-14614.master.032.patch, HBASE-14614.master.033.patch, 
> HBASE-14614.master.034.patch
>
>
> New AssignmentManager implemented using proc-v2.
>  - AssignProcedure handle assignment operation
>  - UnassignProcedure handle unassign operation
>  - MoveRegionProcedure handle move/balance operation
> Concurrent Assign operations are batched together and sent to the balancer
> Concurrent Assign and Unassign operation ready to be sent to the RS are 
> batched together
> This patch is an intermediate state where we add the new AM as 
> AssignmentManager2() to the master, to be reached by tests. but the new AM 
> will not be integrated with the rest of the system. Only new am unit-tests 
> will exercise the new assigment manager. The integration with the master code 
> is part of HBASE-14616



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