[jira] [Created] (YARN-9096) Some GpuResourcePlugin and ResourcePluginManager methods are synchronized unnecessarily

["Szilard Nemeth (JIRA)" <ji...@apache.org>]

Szilard Nemeth created YARN-9096:
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             Summary: Some GpuResourcePlugin and ResourcePluginManager methods are synchronized unnecessarily
                 Key: YARN-9096
                 URL: https://issues.apache.org/jira/browse/YARN-9096
             Project: Hadoop YARN
          Issue Type: Improvement
            Reporter: Szilard Nemeth
            Assignee: Szilard Nemeth


These methods are not used concurrently, they are part of the initialization code of NM that happens from one thread.

This is the list of the call hierarchies: 

1. GpuResourcePlugin.initialize + ResourcePluginManager.initialize

 
{code:java}
GpuResourcePlugin.initialize(Context) (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu) ResourcePluginManager.initialize(Context) (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin) NodeManager.serviceInit(Configuration) (org.apache.hadoop.yarn.server.nodemanager){code}
 

 

2. GpuResourcePlugin.createResourceHandler: 

 
{code:java}
GpuResourcePlugin.createResourceHandler(Context, CGroupsHandler, PrivilegedOperationExecutor) (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu) ResourceHandlerModule.addHandlersFromConfiguredResourcePlugins(List, Configuration, Context) (org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources) ResourceHandlerModule.initializeConfiguredResourceHandlerChain(Configuration, Context) (org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources) ResourceHandlerModule.getConfiguredResourceHandlerChain(Configuration, Context) (org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.resources) ContainerScheduler.serviceInit(Configuration) (org.apache.hadoop.yarn.server.nodemanager.containermanager.scheduler) LinuxContainerExecutor.init(Context) (org.apache.hadoop.yarn.server.nodemanager)
{code}
 

3. GpuResourcePlugin.getNodeResourceHandlerInstance: 

 
{code:java}
GpuResourcePlugin.getNodeResourceHandlerInstance() (org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.gpu)
NodeStatusUpdaterImpl.updateConfiguredResourcesViaPlugins(Resource)(2 usages) (org.apache.hadoop.yarn.server.nodemanager)
NodeStatusUpdaterImpl.serviceInit(Configuration) (org.apache.hadoop.yarn.server.nodemanager)
{code}



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