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https://issues.apache.org/jira/browse/HBASE-5487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13616971#comment-13616971
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Sergey Shelukhin commented on HBASE-5487:
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[~jmhsieh] Will reply in details later/tomorrow, one clarification - the
justification was not just "code is hard to understand", but "code is hard to
reason about AND we want to expand it to support a bunch of features.". I think
the whole idea of general framework, whatever it is, is to have some unified
model of things and way of doing these manipulations and expanding their set,
that is not patchwork.
[~enis] I think finding one is the least of our problems :) How to use it to
store/manage state is the question.
> Generic framework for Master-coordinated tasks
> ----------------------------------------------
>
> Key: HBASE-5487
> URL: https://issues.apache.org/jira/browse/HBASE-5487
> Project: HBase
> Issue Type: New Feature
> Components: master, regionserver, Zookeeper
> Affects Versions: 0.94.0
> Reporter: Mubarak Seyed
> Attachments: Region management in Master.pdf
>
>
> Need a framework to execute master-coordinated tasks in a fault-tolerant
> manner.
> Master-coordinated tasks such as online-scheme change and delete-range
> (deleting region(s) based on start/end key) can make use of this framework.
> The advantages of framework are
> 1. Eliminate repeated code in Master, ZooKeeper tracker and Region-server for
> master-coordinated tasks
> 2. Ability to abstract the common functions across Master -> ZK and RS -> ZK
> 3. Easy to plugin new master-coordinated tasks without adding code to core
> components
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