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https://issues.apache.org/jira/browse/YARN-8881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16687244#comment-16687244
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Chandni Singh commented on YARN-8881:
-------------------------------------
Hi [~tangzhankun], Thanks for the patch. I have some questions/comments
1.
{code}
if (!DevicePlugin.class.isAssignableFrom(pluginClazz)) {
throw new YarnRuntimeException("Class: " + pluginClassName
+ " not instance of " + DevicePlugin.class.getCanonicalName());
}
// sanity-check before initialization
checkInterfaceCompatibility(DevicePlugin.class, pluginClazz);
{code}
It checks if the pluginClazz is an implementation of {{DevicePlugin}} via
{{isAssginableFrom}}. Why is {{checkInterfaceCompatibility}} required?
2. Nitpick: DevicePluginAdapter -> resourceName and devicePlugin can be final.
LOG -> can be private.
{code}
final static Log LOG = LogFactory.getLog(DevicePluginAdapter.class);
private String resourceName;
private DevicePlugin devicePlugin;
{code}
3.
{code}
LOG.debug("Checking implemented interface's compatibility: \"{}\"",
expectedClass.getSimpleName());
{code}
The braces {} don't need to be surrounded by quotes. It is surrounded by
quotes at quite a few places.
4. serialVersionUID is 1 for all the serializable classes. Use a time based or
random large number.
> Phase 1 - Add basic pluggable device plugin framework
> -----------------------------------------------------
>
> Key: YARN-8881
> URL: https://issues.apache.org/jira/browse/YARN-8881
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Zhankun Tang
> Assignee: Zhankun Tang
> Priority: Major
> Attachments: YARN-8881-trunk.001.patch, YARN-8881-trunk.002.patch,
> YARN-8881-trunk.003.patch, YARN-8881-trunk.004.patch,
> YARN-8881-trunk.005.patch, YARN-8881-trunk.006.patch,
> YARN-8881-trunk.007.patch, YARN-8881-trunk.008.patch,
> YARN-8881-trunk.009.patch
>
>
> It includes adding support in "ResourcePluginManager" to load plugin classes
> based on configuration, an interface for the vendor to implement and the
> adapter to decouple plugin and YARN internals. And the vendor device resource
> discovery will be ready after this support
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