Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 3624 invoked from network); 18 Aug 2010 13:14:35 -0000 Received: from unknown (HELO mail.apache.org) (140.211.11.3) by 140.211.11.9 with SMTP; 18 Aug 2010 13:14:35 -0000 Received: (qmail 22246 invoked by uid 500); 18 Aug 2010 13:14:33 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 22106 invoked by uid 500); 18 Aug 2010 13:14:31 -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 22098 invoked by uid 99); 18 Aug 2010 13:14:30 -0000 Received: from Unknown (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 18 Aug 2010 13:14:30 +0000 X-ASF-Spam-Status: No, hits=0.0 required=10.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of jbellis@gmail.com designates 209.85.212.44 as permitted sender) Received: from [209.85.212.44] (HELO mail-vw0-f44.google.com) (209.85.212.44) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 18 Aug 2010 13:14:09 +0000 Received: by vws10 with SMTP id 10so583788vws.31 for ; Wed, 18 Aug 2010 06:13:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:content-type; bh=uCqr/hkPluhfi12X+zkrjTqheqiSibGAsnol1ikppI8=; b=Y86sZNrpJtEfTMZuG/tHESdpRBWV6jmmmpfcsVHDh1VUDSt/Rd2QiGK46EU0AGJxl+ CABowfJ7sdC4hw+SV2744fAgWJgl4cMoD3kL/8SHyRH97R4Mp3SspzQcK2Hl9TN4OaqM JPxKVuUrYsCJ8ugL7WuBYjmbcttMftM1eythU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=wracD03TQmGDR3G6cmIehTgiToB3GSNhjwA4hDJeaLtiz6izbiSwyCUKMzIgkii0y8 vlEgQ1moN6gsB0z2II7vn1yl+dlRLtwI+1TFxOgmavv3h9NuZTUxtlhtezai8Gk8/TBt RuANHeqNK/JlYnaeiE++9xC91wUUnLxXRheKs= Received: by 10.220.86.207 with SMTP id t15mr1285946vcl.130.1282137228324; Wed, 18 Aug 2010 06:13:48 -0700 (PDT) MIME-Version: 1.0 Received: by 10.220.103.204 with HTTP; Wed, 18 Aug 2010 06:13:28 -0700 (PDT) In-Reply-To: References: From: Jonathan Ellis Date: Wed, 18 Aug 2010 08:13:28 -0500 Message-ID: Subject: Re: "MessageDeserializationTask.java (line 47) dropping message" errors To: user@cassandra.apache.org Content-Type: text/plain; charset=ISO-8859-1 X-Virus-Checked: Checked by ClamAV on apache.org This is Cassandra trying to protect itself from the load spike. You probably need to balance your nodes, tune for performance, add capacity, or some combination. On Wed, Aug 18, 2010 at 6:16 AM, Jianing Hu wrote: > We have a 3-node cluster of Cassandra 0.6.4, on one of them there's a > ton of error message like the following one: > WARN [MESSAGE-DESERIALIZER-POOL:1] 2010-08-18 04:10:57,767 > MessageDeserializationTask.java (line 47) dropping message (1ms past > timeout) > > The nod's load spikes and is super slow to read from. Any ideas? > > Thanks. > > - Jianing > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com