Return-Path: X-Original-To: apmail-hadoop-user-archive@minotaur.apache.org Delivered-To: apmail-hadoop-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 1F7F7184D6 for ; Tue, 17 Nov 2015 15:55:10 +0000 (UTC) Received: (qmail 57519 invoked by uid 500); 17 Nov 2015 15:55:00 -0000 Delivered-To: apmail-hadoop-user-archive@hadoop.apache.org Received: (qmail 57402 invoked by uid 500); 17 Nov 2015 15:55:00 -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 57364 invoked by uid 99); 17 Nov 2015 15:55:00 -0000 Received: from Unknown (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 17 Nov 2015 15:55:00 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id D3E63C059C for ; Tue, 17 Nov 2015 15:54:59 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 4.559 X-Spam-Level: **** X-Spam-Status: No, score=4.559 tagged_above=-999 required=6.31 tests=[FREEMAIL_ENVFROM_END_DIGIT=0.25, HTML_MESSAGE=3, RCVD_IN_MSPIKE_BL=0.01, RCVD_IN_MSPIKE_L3=1.3, SPF_PASS=-0.001] autolearn=disabled Received: from mx1-us-west.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id UkVS1LN6AeuU for ; Tue, 17 Nov 2015 15:54:58 +0000 (UTC) Received: from moh3-ve3.go2.pl (moh3-ve3.go2.pl [193.17.41.87]) by mx1-us-west.apache.org (ASF Mail Server at mx1-us-west.apache.org) with ESMTPS id 560CC20C41 for ; Tue, 17 Nov 2015 15:54:58 +0000 (UTC) Received: from moh3-ve3.go2.pl (unknown [10.0.0.158]) by moh3-ve3.go2.pl (Postfix) with ESMTP id E9A40B5A70D for ; Tue, 17 Nov 2015 16:54:49 +0100 (CET) Received: from o2.pl (unknown [10.0.0.7]) by moh3-ve3.go2.pl (Postfix) with SMTP for ; Tue, 17 Nov 2015 16:54:49 +0100 (CET) Subject: =?UTF-8?Q?Does_MapReduceApplicationMaster_prevents?= =?UTF-8?Q?_data_node_from_spawning_YarnChild=3F?= From: =?UTF-8?Q?darekg11?= To: user@hadoop.apache.org Mime-Version: 1.0 Message-ID: <31410a51.23de0f71.564b4dc9.b7ebf@tlen.pl> Date: Tue, 17 Nov 2015 16:54:49 +0100 X-Originator: 91.150.147.194 Content-Type: multipart/alternative; boundary="==o2.pl-WebMail-4bbccb9d.20180ea7.b7ec5==" --==o2.pl-WebMail-4bbccb9d.20180ea7.b7ec5== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello=20again=20dear=20users. Today=20I=20ran=20into=20following=20problem: My=20mini=20cluster=20consist=20of: 1=20NameNode=20and=202=20SlaveNodes.=20 When=20I=20ran=20my=20MapReduce=20program=20written=20in=20java=20with=20= number=20of=20reducers=20equals=20to=20two.=20 As=20the=20result=20on=20first=20SlaveNode=20I=20got=20MRAppMaster=20task= =20and=20only=20the=20second=20slave=20launched=20Yarn=20Child=20which=20= actually=20was=20producing=20output=20results. I=20understand=20that=20MRAppMaster=20is=20essential=20process=20repsonsi= ble=20for=20managing=20life=20of=20given=20task. And=20because=20of=20that=20single=20slave=20node=20can't=20launch=20MrAp= pMaster=20and=20Yarn=20Child=20at=20the=20same=20time=20or=20am=20I=20mis= understanding=20something? --==o2.pl-WebMail-4bbccb9d.20180ea7.b7ec5== Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello=20again=20dear=20users.Today=20I=20ran=20into=20fol= lowing=20problem:My=20mini=20cluster=20consist=20of:1=20NameNode=20and=202=20SlaveNodes.=20When=20I=20ran=20= my=20MapReduce=20program=20written=20in=20java=20with=20number=20of=20red= ucers=20equals=20to=20two.=20As=20the=20result=20on=20first=20Sla= veNode=20I=20got=20MRAppMaster=20task=20and=20only=20the=20second=20slave= =20launched=20Yarn=20Child=20which=20actually=20was=20producing=20output=20= results.I=20understand=20that=20MRAppMaster=20is=20essent= ial=20process=20repsonsible=20for=20managing=20life=20of=20given=20task.<= br=20/>And=20because=20of=20that=20single=20slave=20node=20can't=20= launch=20MrAppMaster=20and=20Yarn=20Child=20at=20the=20same=20time=20or=20= am=20I=20misunderstanding=20something? --==o2.pl-WebMail-4bbccb9d.20180ea7.b7ec5==--