From mapreduce-issues-return-92985-archive-asf-public=cust-asf.ponee.io@hadoop.apache.org Sat Jan 26 06:09:12 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 8B355180771 for ; Sat, 26 Jan 2019 06:09:11 +0100 (CET) Received: (qmail 14710 invoked by uid 500); 26 Jan 2019 05:09:10 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 14699 invoked by uid 99); 26 Jan 2019 05:09:10 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Sat, 26 Jan 2019 05:09:10 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id ED786C23A5 for ; Sat, 26 Jan 2019 05:09:09 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.301 X-Spam-Level: X-Spam-Status: No, score=-110.301 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id Ly8WUI1aicV7 for ; Sat, 26 Jan 2019 05:09:08 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTP id 3B77D62344 for ; Sat, 26 Jan 2019 04:59:01 +0000 (UTC) Received: from jira-lw-us.apache.org (unknown [207.244.88.139]) by mailrelay1-us-west.apache.org (ASF Mail Server at mailrelay1-us-west.apache.org) with ESMTP id 733C4E262A for ; Sat, 26 Jan 2019 04:59:00 +0000 (UTC) Received: from jira-lw-us.apache.org (localhost [127.0.0.1]) by jira-lw-us.apache.org (ASF Mail Server at jira-lw-us.apache.org) with ESMTP id 0BAC82431E for ; Sat, 26 Jan 2019 04:59:00 +0000 (UTC) Date: Sat, 26 Jan 2019 04:59:00 +0000 (UTC) From: "lujie (JIRA)" To: mapreduce-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (MAPREDUCE-7178) NPE while YarnChild shudown MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/MAPREDUCE-7178?page=3Dcom.atla= ssian.jira.plugin.system.issuetabpanels:all-tabpanel ] lujie updated MAPREDUCE-7178: ----------------------------- Attachment: MR-9226_1.patch Status: Patch Available (was: Open) > NPE while YarnChild shudown > --------------------------- > > Key: MAPREDUCE-7178 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-7178 > Project: Hadoop Map/Reduce > Issue Type: Bug > Reporter: lujie > Priority: Major > Attachments: MR-9226_1.patch > > > In YarnChild.main > {code:java} > try{ > logSyncer =3D TaskLog.createLogSyncer();//line 168 > .... > taskFinal.run(job, umbilical); //line 178 > }catch (Exception exception) {//line 187 > LOG.warn("Exception running child : " > + StringUtils.stringifyException(exception)); > ................. > task.taskCleanup(umbilical);// line 200 > }{code} > At line 178. it will initialize the task.committer, but the line168 may t= hrow exception, it will skip=C2=A0=C2=A0initialize the task.committer, henc= e=C2=A0task.committer =3D=3D null. Line 187 will catch this exception and d= o clean up(line 200), code line 200 will use=C2=A0=C2=A0task.committer with= out null check, hence NPE happens > {code:java} > 2019-01-23 16:59:42,864 INFO [main] org.apache.hadoop.mapred.YarnChild: E= xception cleaning up: java.lang.NullPointerException > at org.apache.hadoop.mapred.Task.taskCleanup(Task.java:1458) > at org.apache.hadoop.mapred.YarnChild$3.run(YarnChild.java:200) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformat= ion.java:1876) > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:197) > {code} > So why=C2=A0=C2=A0line168 may throw exception, below log give a example: > {code:java} > 2019-01-23 16:59:42,857 WARN [main] org.apache.hadoop.mapred.YarnChild: E= xception running child : java.lang.IllegalStateException: Shutdown in progr= ess, cannot add a shutdownHook > at org.apache.hadoop.util.ShutdownHookManager.addShutdownHook(ShutdownHoo= kManager.java:299) > at org.apache.hadoop.mapred.TaskLog.createLogSyncer(TaskLog.java:340) > at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:168){code} -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: mapreduce-issues-unsubscribe@hadoop.apache.org For additional commands, e-mail: mapreduce-issues-help@hadoop.apache.org