From common-issues-return-152197-archive-asf-public=cust-asf.ponee.io@hadoop.apache.org Mon May 7 18:49:04 2018 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 BD269180648 for ; Mon, 7 May 2018 18:49:03 +0200 (CEST) Received: (qmail 12843 invoked by uid 500); 7 May 2018 16:49:02 -0000 Mailing-List: contact common-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list common-issues@hadoop.apache.org Received: (qmail 12788 invoked by uid 99); 7 May 2018 16:49:02 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 07 May 2018 16:49:02 +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 0FD0BC00DA for ; Mon, 7 May 2018 16:49:02 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -110.311 X-Spam-Level: X-Spam-Status: No, score=-110.311 tagged_above=-999 required=6.31 tests=[ENV_AND_HDR_SPF_MATCH=-0.5, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_SPF_WL=-7.5, USER_IN_WHITELIST=-100] autolearn=disabled Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id A8Goo9gXpBBR for ; Mon, 7 May 2018 16:49:01 +0000 (UTC) Received: from mailrelay1-us-west.apache.org (mailrelay1-us-west.apache.org [209.188.14.139]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTP id 0B2555FBEA for ; Mon, 7 May 2018 16:49:01 +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 7DFB3E0047 for ; Mon, 7 May 2018 16:49:00 +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 3D3E221296 for ; Mon, 7 May 2018 16:49:00 +0000 (UTC) Date: Mon, 7 May 2018 16:49:00 +0000 (UTC) From: "Arpit Agarwal (JIRA)" To: common-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HADOOP-13738) DiskChecker should perform some disk IO MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 [ https://issues.apache.org/jira/browse/HADOOP-13738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16466159#comment-16466159 ] Arpit Agarwal commented on HADOOP-13738: ---------------------------------------- [~daryn], [~kihwal], we can avoid the fsync storm by using disk IO only for HDFS-triggered disk checks. These are already throttled to at most once per 15 minutes. The other issue you reported - disk full - can also be handled separately. I'll file a follow up Jira and post a patch this week. > DiskChecker should perform some disk IO > --------------------------------------- > > Key: HADOOP-13738 > URL: https://issues.apache.org/jira/browse/HADOOP-13738 > Project: Hadoop Common > Issue Type: Improvement > Reporter: Arpit Agarwal > Assignee: Arpit Agarwal > Priority: Major > Fix For: 2.9.0, 3.0.0-alpha2, 2.8.4 > > Attachments: HADOOP-13738-branch-2.8-06.patch, HADOOP-13738.01.patch, HADOOP-13738.02.patch, HADOOP-13738.03.patch, HADOOP-13738.04.patch, HADOOP-13738.05.patch > > > DiskChecker can fail to detect total disk/controller failures indefinitely. We have seen this in real clusters. DiskChecker performs simple permissions-based checks on directories which do not guarantee that any disk IO will be attempted. > A simple improvement is to write some data and flush it to the disk. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: common-issues-unsubscribe@hadoop.apache.org For additional commands, e-mail: common-issues-help@hadoop.apache.org