[ https://issues.apache.org/jira/browse/HADOOP-15549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Todd Lipcon updated HADOOP-15549: --------------------------------- Attachment: hadoop-15549.txt > Upgrade to commons-configuration 2.1 regresses task CPU consumption > ------------------------------------------------------------------- > > Key: HADOOP-15549 > URL: https://issues.apache.org/jira/browse/HADOOP-15549 > Project: Hadoop Common > Issue Type: Bug > Components: metrics > Affects Versions: 3.0.2 > Reporter: Todd Lipcon > Assignee: Todd Lipcon > Priority: Major > Attachments: hadoop-15549.txt > > > HADOOP-13660 upgraded from commons-configuration 1.x to 2.x. > commons-configuration is used when parsing the metrics configuration > properties file. The new builder API used in the new version apparently makes > use of a bunch of very bloated reflection and classloading nonsense to > achieve the same goal, and this results in a regression of >100ms of CPU time > as measured by a program which simply initializes DefaultMetricsSystem. > This isn't a big deal for long-running daemons, but for MR tasks which might > only run a few seconds on poorly-tuned jobs, this can be noticeable. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-issues-h...@hadoop.apache.org