[ https://issues.apache.org/jira/browse/HADOOP-12908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
John Zhuge updated HADOOP-12908: -------------------------------- Status: In Progress (was: Patch Available) > Make JvmPauseMonitor a singleton > -------------------------------- > > Key: HADOOP-12908 > URL: https://issues.apache.org/jira/browse/HADOOP-12908 > Project: Hadoop Common > Issue Type: Improvement > Affects Versions: 2.7.2 > Reporter: John Zhuge > Assignee: John Zhuge > Priority: Minor > Attachments: HADOOP-12908-001.patch, HADOOP-12908-002.patch, > HADOOP-12908-003.patch, HADOOP-12908-004.patch > > > Make JvmPauseMonitor a singleton just as JvmMetrics because there is no use > case to run multiple instances per JVM. {{TestMetrics$setPauseMonitor}} > becomes obsolete. Initialization code for various components can be > simplified. > For example, this code segment > {code} > pauseMonitor = new JvmPauseMonitor(); > addService(pauseMonitor); > jm.setPauseMonitor(pauseMonitor); > {code} > can be replaced with > {code} > addService(JvmPauseMonitor.getInstance()); > {code} > And this code segment > {code} > pauseMonitor = new JvmPauseMonitor(); > pauseMonitor.init(config); > pauseMonitor.start(); > metrics.getJvmMetrics().setPauseMonitor(pauseMonitor); > {code} > can be replaced with > {code} > pauseMonitor = JvmPauseMonitor.getInstance(); > pauseMonitor.init(config); > pauseMonitor.start(); > {code} -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org