From hbase-user-return-2448-apmail-hadoop-hbase-user-archive=hadoop.apache.org@hadoop.apache.org Wed Dec 10 05:58:15 2008 Return-Path: Delivered-To: apmail-hadoop-hbase-user-archive@locus.apache.org Received: (qmail 34720 invoked from network); 10 Dec 2008 05:58:15 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 10 Dec 2008 05:58:15 -0000 Received: (qmail 59988 invoked by uid 500); 10 Dec 2008 05:58:27 -0000 Delivered-To: apmail-hadoop-hbase-user-archive@hadoop.apache.org Received: (qmail 59958 invoked by uid 500); 10 Dec 2008 05:58:27 -0000 Mailing-List: contact hbase-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hbase-user@hadoop.apache.org Delivered-To: mailing list hbase-user@hadoop.apache.org Received: (qmail 59947 invoked by uid 99); 10 Dec 2008 05:58:27 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 09 Dec 2008 21:58:27 -0800 X-ASF-Spam-Status: No, hits=-0.0 required=10.0 tests=SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: local policy) Received: from [63.203.238.117] (HELO dns.duboce.net) (63.203.238.117) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 10 Dec 2008 05:58:12 +0000 Received: by dns.duboce.net (Postfix, from userid 1008) id D4A96C566; Tue, 9 Dec 2008 20:26:51 -0800 (PST) X-Spam-Checker-Version: SpamAssassin 3.1.4 (2006-07-26) on dns.duboce.net X-Spam-Level: Received: from [192.168.1.8] (unknown [192.168.1.8]) by dns.duboce.net (Postfix) with ESMTP id 9902BC256 for ; Tue, 9 Dec 2008 20:26:49 -0800 (PST) Message-ID: <493F5A5D.7010902@duboce.net> Date: Tue, 09 Dec 2008 21:57:49 -0800 From: Michael Stack User-Agent: Thunderbird 2.0.0.17 (X11/20080925) MIME-Version: 1.0 To: hbase-user@hadoop.apache.org Subject: Re: Again UnknowScannerException References: <35DAF916-44A0-461D-B632-FBFEA9E8B1A6@student.dei.uc.pt> <31a243e70811210833m70f71730s777e4b7dd17223fc@mail.gmail.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org X-Old-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.1.4 Edward J. Yoon wrote: > To change hbase.regionserver.lease.period, Should I restart hbase cluster? > Edward: Yes, unfortunately (should make it so you don't have to). David: Please upgrade to hbase 0.18.1 for other reasons than hbase.regionserver.lease.period (and hadoop 0.18.2). You do not need to upgrade hadoop to run hbase 0.18.1 (or viceversa). If lease period is all you want to change (HBASE-821), you don't need to upgrade; just make the change in your configuration (as J-D says) and copy it around your cluster. St.Ack > On Sat, Nov 22, 2008 at 1:33 AM, Jean-Daniel Cryans wrote: > >> David, >> >> You should indeed increase your hbase.regionserver.lease.period to at least >> 2 minutes. >> >> J-D >> >> On Fri, Nov 21, 2008 at 4:55 AM, David Alves wrote: >> >> >>> Hi >>> >>> I've seen this issue a lot in the mailing list, but I still have a >>> doubt. >>> My map tasks keep failing with unknownscannerexception (2 map tasks >>> on same node over a 3 node cluster with 4Gb mem, scanning almost 40 GBs of >>> data, running hadoop 0.18.0, and hbase 0.18.0), this happened in the past, >>> but as it passed 50% of the times rarely a M/R task completely failed, as >>> the data increased the USE now completely prevents the maps from running to >>> completion. I'm only scanning the table, there are no inserts at the same >>> time. >>> I've previouly seen mentioned a lease period I could increase. Is >>> this the "hbase.regionserver.lease.period" property? Should I upgrade to >>> hbase 0.18.1, and if so must I also update hadoop? >>> >>> Regards >>> David Alves >>> >>> >>> >>> > > > >