From hdfs-dev-return-610-apmail-hadoop-hdfs-dev-archive=hadoop.apache.org@hadoop.apache.org Tue Dec 15 07:54:28 2009 Return-Path: Delivered-To: apmail-hadoop-hdfs-dev-archive@minotaur.apache.org Received: (qmail 66992 invoked from network); 15 Dec 2009 07:54:28 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.3) by minotaur.apache.org with SMTP; 15 Dec 2009 07:54:28 -0000 Received: (qmail 31466 invoked by uid 500); 15 Dec 2009 07:54:27 -0000 Delivered-To: apmail-hadoop-hdfs-dev-archive@hadoop.apache.org Received: (qmail 31187 invoked by uid 500); 15 Dec 2009 07:54:27 -0000 Mailing-List: contact hdfs-dev-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-dev@hadoop.apache.org Delivered-To: mailing list hdfs-dev@hadoop.apache.org Received: (qmail 31104 invoked by uid 99); 15 Dec 2009 07:54:26 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 15 Dec 2009 07:54:26 +0000 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: domain of jdcryans@gmail.com designates 209.85.222.198 as permitted sender) Received: from [209.85.222.198] (HELO mail-pz0-f198.google.com) (209.85.222.198) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 15 Dec 2009 07:54:19 +0000 Received: by pzk36 with SMTP id 36so2912838pzk.5 for ; Mon, 14 Dec 2009 23:53:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to:cc :content-type:content-transfer-encoding; bh=VcWwGTS12mTmj4uK5JGZiRPQh/7MM4Fs7J2HFzlDGs4=; b=fJBO0wPITdUoon7q09ev+2k5SAuQR71CIRmPF2Yl8Hu7i/iNy3tZXMqnNB0dr6N+37 ffnBSgNGjiaxXMdZTW/lG4xmcPGfSKa8pNumaPkDI/SyGjoOW25s9wf0I1skmuLia/JK JeJEd7HpREjLpaw9X3Doxx1JUXFvP+M0GvAmA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=ht5uUYl/F46viNeG/pmg4+S3J5pTJyRsUgaI9e5JntQQLNCdZW6xWV2EuJQfw+nOIk 9hfDQ0NPLBjGWaJHHWbzYuQZ+RSb5aOT48zBL/tAPEgMuVIINnB0xlF0M0YSi6uGIhrG SdQGbxqxJrKTiBppeNXrndUWigic8vDGA1ooU= MIME-Version: 1.0 Sender: jdcryans@gmail.com Received: by 10.114.237.18 with SMTP id k18mr4025970wah.63.1260863637695; Mon, 14 Dec 2009 23:53:57 -0800 (PST) In-Reply-To: <914611.19919.qm@web65513.mail.ac4.yahoo.com> References: <914611.19919.qm@web65513.mail.ac4.yahoo.com> Date: Mon, 14 Dec 2009 23:53:57 -0800 X-Google-Sender-Auth: 4b84c54bc4b460c9 Message-ID: <31a243e70912142353g1c518565pd5f4870382f1fb1b@mail.gmail.com> Subject: Re: Commit hdfs-630 to 0.21? From: Jean-Daniel Cryans To: hdfs-dev@hadoop.apache.org Cc: hbase-dev@hadoop.apache.org Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Checked: Checked by ClamAV on apache.org +1 for 0.21.0 J-D On Mon, Dec 14, 2009 at 11:30 PM, Andrew Purtell wrot= e: > +1 > > > On Sat, Dec 12, 2009 at 3:54 PM, stack wrote: > >> HDFS-630 is kinda critical to us over in hbase. =A0We'd like to get it i= nto >> 0.21 (Its been committed to TRUNK). =A0Its probably hard to argue its a >> blocker for 0.21. =A0We could run a vote. =A0Or should we just file it a= gainst >> 0.21.1 hdfs and commit it after 0.21 goes out? =A0What would folks sugge= st? >> >> Without it, a node crash (datanode+regionserver) will bring down a secon= d >> regionserver, particularly if the cluster is small (See HBASE-1876 for >> description of the play-by-play where NN keeps giving out dead DN as pla= ce >> to locate new blocks). =A0Since the bulk of hbase clusters are small -- >> whether evaluations, test, or just small productions -- this issue is an >> important fix for us. =A0If the cluster is of 5 or less nodes, we'll pro= bably >> recover but there'll be a period of churn. =A0At a minimum mapreduce job= s >> running against the cluster will fail (usually some kind of bullk upload= ). >> >> St.Ack >> > > >