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https://issues.apache.org/jira/browse/HBASE-8544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13657271#comment-13657271
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Gaurav Menghani commented on HBASE-8544:
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Hi Sergey,
We are trying a simpler solution internally in the 89-fb branch for the Region
Server (only, so far). The idea is like this:
Part 1 (this JIRA):
- Make the Region Servers reload the configurations from disk. This however,
does not make other classes reload, which have their own copies of conf
property values.
Part 2 (another JIRA):
- Every class that keeps properties which might be reconfigurable, must extend
the HBaseReconfigurable, which makes them implement
notifyOnChange(Array<Pair<String,String>> changedProperties)
- Each such class should register with a registry which keeps track of all the
Reconfigurable objects and the properties that they are interested in.
- The registry's update() method is called when the conf is updated. It goes
through the configurations which have changed and notifies the classes which
have registered to be interested in the changing properties.
Part 2 is not code complete yet, and we will be discussing that internally. If
you have any feedback, I would be glad if you could share it :)
> Add a utility to reload configurations in Region Server
> -------------------------------------------------------
>
> Key: HBASE-8544
> URL: https://issues.apache.org/jira/browse/HBASE-8544
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 0.89-fb
> Reporter: Gaurav Menghani
>
> Create a utility that can talk to the Region Servers and make them reload
> configurations on disk.
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