Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 40BBA9E8E for ; Sun, 1 Jul 2012 03:57:55 +0000 (UTC) Received: (qmail 27380 invoked by uid 500); 1 Jul 2012 03:57:53 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 27077 invoked by uid 500); 1 Jul 2012 03:57:47 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 27046 invoked by uid 99); 1 Jul 2012 03:57:46 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 01 Jul 2012 03:57:46 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=FSL_RCVD_USER,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of david.daeschler@gmail.com designates 74.125.82.44 as permitted sender) Received: from [74.125.82.44] (HELO mail-wg0-f44.google.com) (74.125.82.44) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 01 Jul 2012 03:57:41 +0000 Received: by wgbdr13 with SMTP id dr13so3332559wgb.25 for ; Sat, 30 Jun 2012 20:57:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=sv3hB0FYEz9pjc6LLyEvQ6tbtwn/YQVg+pw/9YY/cjU=; b=U/cUyaEL12vikc0NOc+FPLCZiTNAuY07z3lCrll+SQ1ucGPpGPmXOkc6aKAfCvkmpc QyaGZ4DFyRQZhfAx693MaxAuKlYknaZ/RrlKnkF3NC418xEX8DtzEYL+QGxBXZZmQOe/ CA578hV5hgZVRm6S1iwQumdZ89i7XSkrRLl10B7sTiQF8JCor9NHPbGeBYOg+OhDInm/ LrQJ7GyREfftEGoJwsVSNA35RunqbQj7gevdg4gemTSRc3V7qKmMQXmqqY1yYrTaGAAm sCJVLrHit8KfFGF3IY9+rThqqVtMEoVyiRppe2uR1pHkmyx0DNwXvxbpl6LRALlQffE4 qmfA== MIME-Version: 1.0 Received: by 10.216.207.151 with SMTP id n23mr3531802weo.100.1341115040321; Sat, 30 Jun 2012 20:57:20 -0700 (PDT) Received: by 10.180.107.69 with HTTP; Sat, 30 Jun 2012 20:57:20 -0700 (PDT) In-Reply-To: <2AF22870-3959-47DF-83C9-AADC37610800@bloomdigital.com> References: <2AF22870-3959-47DF-83C9-AADC37610800@bloomdigital.com> Date: Sat, 30 Jun 2012 23:57:20 -0400 Message-ID: Subject: Re: High CPU usage as of 8pm eastern time From: David Daeschler To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org YES! This happened to me as well. RUNNING THAT COMMAND FIXED THE PROBLEM! THANK YOU SO MUCH On Sat, Jun 30, 2012 at 11:11 PM, Mina Naguib wrote: > > Hi folks > > Our cassandra (and other java-based apps) started experiencing extremely high CPU usage as of 8pm eastern time (midnight UTC). > > The issue appears to be related to specific versions of java + linux + ntpd > > There are many solutions floating around on IRC, twitter, stackexchange, LKML. > > The simplest one that worked for us is simply to run this command on each affected machine: > > date; date `date +"%m%d%H%M%C%y.%S"`; date; > > CPU drop was instantaneous - there was no need to restart the server, ntpd, or any of the affected JVMs. > > > -- David Daeschler