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Luke Lu commented on HADOOP-7529: --------------------------------- bq. Yep, the wiki is here: http://wiki.apache.org/hadoop/HowToUseJCarder Thanks. I was hoping for a simpler process/script to reproduce these graphs though :) I agree with you on the wiki that it's important to avoid false positives to reduce noise. These two cycles are already borderline and practically harmless, as unlike start/stop, init/shutdown doesn't overlap registration. bq. I'm working on getting access to the new build infrastructure so I can set up hudson jobs to run jcarder on a regular basis This will be a time saver. +1 and Thanks! > Possible deadlock in metrics2 > ----------------------------- > > Key: HADOOP-7529 > URL: https://issues.apache.org/jira/browse/HADOOP-7529 > Project: Hadoop Common > Issue Type: Bug > Components: metrics > Affects Versions: 0.23.0 > Reporter: Todd Lipcon > Assignee: Luke Lu > Priority: Critical > Fix For: 0.23.0 > > Attachments: hadoop-7529-v1.patch, hadoop-7529-v2.patch, > metrics-deadlock.png, metrics-shutdown.png > > > Lock cycle detected by jcarder between MetricsSystemImpl and > DefaultMetricsSystem -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira