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https://issues.apache.org/jira/browse/YARN-10216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cyrus Jackson updated YARN-10216:
---------------------------------
Description:
There should be a way to dynamically reload the configuration properties from
the disk. The purpose of this feature is to let individual classes which are
interested in observing this configuration changes, to be notified when the
conf is reloaded from the disk. This is similar to how Hbase has done.
*Class Diagram*
!image-2020-04-06-09-50-51-948.png!
*APPROACH DETAILS*
The approach is based on the adaption of Hbase Online Configuration. In this
case, the configuration file is monitored for any changes on the disk. If the
file has changed, the properties of Configuration is reloaded and all the
observers are notified.
The classes that implements the observers updates the necessary values if
required.
was:
There should be a way to dynamically reload the configuration properties from
the disk. The purpose of this feature is to let individual classes which are
interested in observing this configuration changes, to be notified when the
conf is reloaded from the disk. This is similar to how Hbase has done.
*Class Diagram*
!image-2020-04-06-09-50-51-948.png!
*APPROACH DETAILS*
The approach is based on the adaption of Hbase Online Configuration. In this
case, the configuration file is monitored for any changes. If the file has
changed, the properties of Configuration is reloaded from the disk and the
observers are notified.
The classes that implements the observers are required to update the necessary
values.
> Utility to dynamically reload Configuration on the disk
> -------------------------------------------------------
>
> Key: YARN-10216
> URL: https://issues.apache.org/jira/browse/YARN-10216
> Project: Hadoop YARN
> Issue Type: New Feature
> Reporter: Cyrus Jackson
> Priority: Major
> Attachments: image-2020-04-06-09-50-51-948.png
>
>
> There should be a way to dynamically reload the configuration properties from
> the disk. The purpose of this feature is to let individual classes which are
> interested in observing this configuration changes, to be notified when the
> conf is reloaded from the disk. This is similar to how Hbase has done.
> *Class Diagram*
> !image-2020-04-06-09-50-51-948.png!
>
> *APPROACH DETAILS*
> The approach is based on the adaption of Hbase Online Configuration. In this
> case, the configuration file is monitored for any changes on the disk. If the
> file has changed, the properties of Configuration is reloaded and all the
> observers are notified.
> The classes that implements the observers updates the necessary values if
> required.
>
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