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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