Return-Path: Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: (qmail 95465 invoked from network); 21 Feb 2011 18:42:14 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 21 Feb 2011 18:42:14 -0000 Received: (qmail 76143 invoked by uid 500); 21 Feb 2011 18:42:12 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 75995 invoked by uid 500); 21 Feb 2011 18:42:09 -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 75987 invoked by uid 99); 21 Feb 2011 18:42:09 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 21 Feb 2011 18:42:09 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=RCVD_IN_DNSWL_LOW,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (nike.apache.org: local policy) Received: from [209.85.213.44] (HELO mail-yw0-f44.google.com) (209.85.213.44) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 21 Feb 2011 18:42:00 +0000 Received: by ywi6 with SMTP id 6so1378688ywi.31 for ; Mon, 21 Feb 2011 10:41:38 -0800 (PST) MIME-Version: 1.0 Received: by 10.151.148.14 with SMTP id a14mr2077372ybo.410.1298313698529; Mon, 21 Feb 2011 10:41:38 -0800 (PST) Sender: scode@scode.org Received: by 10.150.148.20 with HTTP; Mon, 21 Feb 2011 10:41:38 -0800 (PST) X-Originating-IP: [90.232.252.176] In-Reply-To: <02A69123-F1AD-4D01-9424-ED35BD0B32AB@thelastpickle.com> References: <4d5d423d.d44de50a.18a3.2838@mx.google.com> <9F8597F9-BB0F-4169-8E33-81939C4FC419@thelastpickle.com> <02A69123-F1AD-4D01-9424-ED35BD0B32AB@thelastpickle.com> Date: Mon, 21 Feb 2011 19:41:38 +0100 X-Google-Sender-Auth: XYAIMVXPhCwHhuI6wypQSZR-KZU Message-ID: Subject: Re: frequent client exceptions on 0.7.0 From: Peter Schuller To: user@cassandra.apache.org Cc: Aaron Morton Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org > AFAIK the MemtablePostFlusher is the TP writing sstables, if it has a que= ue then there is the potential for writes to block while it waits for Memta= bles to be flushed. Take a look at your Memtable settings per CF, could it = be that all the Memtables are flushing at once? There is info in the logs a= bout when this happens. I didn't follow this thread closely, but based on the above maybe have a look at: https://issues.apache.org/jira/browse/CASSANDRA-1955 https://issues.apache.org/jira/browse/CASSANDRA-1991 (And no, I haven't had the time to do anything more on those since what's there. Sorry.) --=20 / Peter Schuller