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From "Xuan Gong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-6922) Findbugs warning in YARN NodeManager
Date Tue, 01 Aug 2017 23:10:00 GMT
Xuan Gong created YARN-6922:
-------------------------------

             Summary: Findbugs warning in YARN NodeManager
                 Key: YARN-6922
                 URL: https://issues.apache.org/jira/browse/YARN-6922
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 3.0.0-beta1
            Reporter: Xuan Gong


Several findbugs warning in YARN NodeManager package.
{code}
org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
is a mutable collection which should be package protected
Bug type MS_MUTABLE_COLLECTION_PKGPROTECT (click for details) 
In class org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics
Field org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainerMetrics.usageMetrics
At ContainerMetrics.java:[line 134]
{code}

{code}
	org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
makes inefficient use of keySet iterator instead of entrySet iterator
Bug type WMI_WRONG_MAP_ITERATOR (click for details) 
In class org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer
In method org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.createStatus()
Field org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.pendingResources
At ContainerLocalizer.java:[line 357]
{code}

{code}
	org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
makes inefficient use of keySet iterator instead of entrySet iterator
Bug type WMI_WRONG_MAP_ITERATOR (click for details) 
In class org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl
In method org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeVeryOldStoppedContainersFromCache()
Field org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.recentlyStoppedContainers
At NodeStatusUpdaterImpl.java:[line 719]
{code}

{code}
Hard coded reference to an absolute pathname in org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.DockerLinuxContainerRuntime.launchContainer(ContainerRuntimeContext)
Bug type DMI_HARDCODED_ABSOLUTE_FILENAME (click for details) 
In class org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.DockerLinuxContainerRuntime
In method org.apache.hadoop.yarn.server.nodemanager.containermanager.linux.runtime.DockerLinuxContainerRuntime.launchContainer(ContainerRuntimeContext)
File name /sys/fs/cgroup
At DockerLinuxContainerRuntime.java:[line 490]
{code}

{code}
	Useless object stored in variable removedNullContainers of method org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
Bug type UC_USELESS_OBJECT (click for details) 
In class org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl
In method org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.removeOrTrackCompletedContainersFromContext(List)
Value removedNullContainers
Type java.util.HashSet
At NodeStatusUpdaterImpl.java:[line 642]
{code}



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