{"action":"created","issue":{"url":"https://api.github.com/repos/Netflix/Hystrix/issues/788","labels_url":"https://api.github.com/repos/Netflix/Hystrix/issues/788/labels{/name}","comments_url":"https://api.github.com/repos/Netflix/Hystrix/issues/788/comments","events_url":"https://api.github.com/repos/Netflix/Hystrix/issues/788/events","html_url":"https://github.com/Netflix/Hystrix/issues/788","id":73673122,"number":788,"title":"ArrayIndexOutOfBoundsException when monitoring in dashboard","user":{"login":"killme2008","id":14142,"avatar_url":"https://avatars.githubusercontent.com/u/14142?v=3","gravatar_id":"","url":"https://api.github.com/users/killme2008","html_url":"https://github.com/killme2008","followers_url":"https://api.github.com/users/killme2008/followers","following_url":"https://api.github.com/users/killme2008/following{/other_user}","gists_url":"https://api.github.com/users/killme2008/gists{/gist_id}","starred_url":"https://api.github.com/users/killme2008/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/killme2008/subscriptions","organizations_url":"https://api.github.com/users/killme2008/orgs","repos_url":"https://api.github.com/users/killme2008/repos","events_url":"https://api.github.com/users/killme2008/events{/privacy}","received_events_url":"https://api.github.com/users/killme2008/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":16,"created_at":"2015-05-06T16:37:43Z","updated_at":"2015-05-27T02:43:05Z","closed_at":null,"body":"When the app server is connected to  dashboard by event stream, i found some exception in our log:\r\n```\r\njava.lang.ArrayIndexOutOfBoundsException\r\n\tat org.HdrHistogram.AbstractHistogramIterator.next(AbstractHistogramIterator.java:100)\r\n\tat org.HdrHistogram.RecordedValuesIterator.next(RecordedValuesIterator.java:18)\r\n\tat org.HdrHistogram.AbstractHistogram.getMean(AbstractHistogram.java:1121)\r\n\tat com.netflix.hystrix.util.HystrixRollingPercentile$PercentileSnapshot.getMean(HystrixRollingPercentile.java:327)\r\n\tat com.netflix.hystrix.util.HystrixRollingPercentile.getMean(HystrixRollingPercentile.java:155)\r\n\tat com.netflix.hystrix.HystrixCommandMetrics.getTotalTimeMean(HystrixCommandMetrics.java:244)\r\n\tat com.netflix.hystrix.contrib.metrics.eventstream.HystrixMetricsPoller$MetricsPoller.run(HystrixMetricsPoller.java:140)\r\n\tat java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)\r\n\tat java.util.concurrent.FutureTask.runAndReset(FutureTask.java:304)\r\n\tat java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)\r\n\tat java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)\r\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)\r\n\tat java.lang.Thread.run(Thread.java:745)\r\n\r\n```\r\n\r\nThe dashboard still works, but maybe there is a bug here."},"comment":{"url":"https://api.github.com/repos/Netflix/Hystrix/issues/comments/105734733","html_url":"https://github.com/Netflix/Hystrix/issues/788#issuecomment-105734733","issue_url":"https://api.github.com/repos/Netflix/Hystrix/issues/788","id":105734733,"user":{"login":"mattrjacobs","id":205579,"avatar_url":"https://avatars.githubusercontent.com/u/205579?v=3","gravatar_id":"","url":"https://api.github.com/users/mattrjacobs","html_url":"https://github.com/mattrjacobs","followers_url":"https://api.github.com/users/mattrjacobs/followers","following_url":"https://api.github.com/users/mattrjacobs/following{/other_user}","gists_url":"https://api.github.com/users/mattrjacobs/gists{/gist_id}","starred_url":"https://api.github.com/users/mattrjacobs/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattrjacobs/subscriptions","organizations_url":"https://api.github.com/users/mattrjacobs/orgs","repos_url":"https://api.github.com/users/mattrjacobs/repos","events_url":"https://api.github.com/users/mattrjacobs/events{/privacy}","received_events_url":"https://api.github.com/users/mattrjacobs/received_events","type":"User","site_admin":false},"created_at":"2015-05-27T02:43:04Z","updated_at":"2015-05-27T02:43:04Z","body":"Glad to hear it.  You should probably upgrade to 1.4.9, as I found a similar issue where some percentile writes were lost (#799)."}}