Return-Path: X-Original-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-user-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id C6B161063C for ; Tue, 24 Sep 2013 05:30:07 +0000 (UTC) Received: (qmail 90631 invoked by uid 500); 24 Sep 2013 05:30:00 -0000 Delivered-To: apmail-hadoop-hdfs-user-archive@hadoop.apache.org Received: (qmail 90388 invoked by uid 500); 24 Sep 2013 05:29:59 -0000 Mailing-List: contact user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@hadoop.apache.org Delivered-To: mailing list user@hadoop.apache.org Received: (qmail 90347 invoked by uid 99); 24 Sep 2013 05:29:58 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 24 Sep 2013 05:29:58 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of jayamviswanathan@gmail.com designates 209.85.160.48 as permitted sender) Received: from [209.85.160.48] (HELO mail-pb0-f48.google.com) (209.85.160.48) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 24 Sep 2013 05:29:51 +0000 Received: by mail-pb0-f48.google.com with SMTP id ma3so4095972pbc.21 for ; Mon, 23 Sep 2013 22:29:30 -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=nPEJY80Kg9WnTGWICs8Te+iGtcdh/UXo3+mX8uKcpw0=; b=eVogAIOk/Fmbi3k5Zpk807FqPfJ0WxsTSYQtc+ByTNRUNuA0LNqAtzcqnk3xN7+j5b nTIET2W+WUShP/nzrxuG4ovLqYUK6w8pErspGeVpTA6aApEAg/Zi4LfTGeC/Gi+0hEfD TFWMuySDdvn8TmcD3qL+MR3HKoiaPwn9ph2LnYjivNNZtdX6PiX8X6sdK3KRN9U/wZWu 54cuhg5gTxsbuRvgoEZm0CoBqh77od6bm7bMmtiscJWkVuaQ7Fjjmi6mtRkg2+8TzGHI f3mA48heGsByyvaFgcipY9AkKRtJZNq1mzKwKB1NS6RENn6opvgg6dIAPNQt3U3I+9h6 akHA== MIME-Version: 1.0 X-Received: by 10.66.27.143 with SMTP id t15mr4024455pag.171.1380000570194; Mon, 23 Sep 2013 22:29:30 -0700 (PDT) Received: by 10.70.130.229 with HTTP; Mon, 23 Sep 2013 22:29:30 -0700 (PDT) Received: by 10.70.130.229 with HTTP; Mon, 23 Sep 2013 22:29:30 -0700 (PDT) In-Reply-To: References: Date: Tue, 24 Sep 2013 10:59:30 +0530 Message-ID: Subject: Re: Mapreduce jobtracker recover property From: Viswanathan J To: user@hadoop.apache.org Content-Type: multipart/alternative; boundary=bcaec52bea19c6cc5804e71a6b65 X-Virus-Checked: Checked by ClamAV on apache.org --bcaec52bea19c6cc5804e71a6b65 Content-Type: text/plain; charset=ISO-8859-1 Hi Shahab, Thanks for the detailed response. So the new property will have the default value as true in the package? Thanks, Viswa.J On Sep 24, 2013 8:33 AM, "Shahab Yunus" wrote: > *mapred.jobtracker.restart.recover *is the old API, while the other one is > for new. It is used to specify whether the job should try to resume at > recovering time and when restarting. If you don't want to use it then the > default value of false is used (specified in the already packaged/bundled > config file in the distribution jars.) > > > https://www.inkling.com/read/hadoop-definitive-guide-tom-white-3rd/chapter-5/running-on-a-cluster > > Regards, > Shahab > > > On Mon, Sep 23, 2013 at 10:31 PM, Viswanathan J < > jayamviswanathan@gmail.com> wrote: > >> Hi, >> >> I'm using the version Hadoop 1.2.1 in production hdfs, i can see the the >> following properties with the value in jobtracker job.xml, >> >> *mapreduce.job.restart.recover - true* >> *mapred.jobtracker.restart.recover - false** >> * >> >> What is the difference and which property will taken by the jobtracker? >> Do we need really need these properties? >> >> Also I didn't set the value to those properties in any of the >> configurations(eg., mapred-site.xml). >> >> Please help on this. >> >> -- >> Regards, >> Viswa.J >> > > --bcaec52bea19c6cc5804e71a6b65 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

Hi Shahab,

Thanks for the detailed response.

So the new property will have the default value as true in the package?<= /p>

Thanks,
Viswa.J

On Sep 24, 2013 8:33 AM, "Shahab Yunus"= ; <shahab.yunus@gmail.com&= gt; wrote:
*mapred.jobtracker.restart.recover *is the old API, while the other one is=
for new. It is = used to specify whether the job should try to resume at
recovering time and when restarting. If you d= on't want to use it then the
default value o= f false is used (specified in the already packaged/bundled
config file in the distribution jars.)

https://www.inkling.com/read/hadoop-definitive-guide-tom-whi= te-3rd/chapter-5/running-on-a-cluster

Regards,
Shahab


On Mon,= Sep 23, 2013 at 10:31 PM, Viswanathan J <jayamviswanathan@gmail.= com> wrote:
Hi,

I= 9;m using the version Hadoop 1.2.1 in production hdfs, i can see the the fo= llowing properties with the value in jobtracker =A0job.xml,

mapreduce.job.restart.recover - true
mapred.jobtracker.restart.recover - false

What is the difference and which propert= y will taken by the jobtracker? Do we need really need these properties?

Also I didn't set the value to those properties = in any of the configurations(eg., mapred-site.xml).

Please help on this.

--
Regards,
Viswa.J

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