Return-Path: X-Original-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-hdfs-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 18040174A8 for ; Fri, 16 Oct 2015 13:27:07 +0000 (UTC) Received: (qmail 76520 invoked by uid 500); 16 Oct 2015 13:27:06 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 76460 invoked by uid 500); 16 Oct 2015 13:27:06 -0000 Mailing-List: contact hdfs-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hdfs-issues@hadoop.apache.org Delivered-To: mailing list hdfs-issues@hadoop.apache.org Received: (qmail 76444 invoked by uid 99); 16 Oct 2015 13:27:06 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 16 Oct 2015 13:27:06 +0000 Date: Fri, 16 Oct 2015 13:27:06 +0000 (UTC) From: "Steve Loughran (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-8880) NameNode metrics logging 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/HDFS-8880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14960683#comment-14960683 ] Steve Loughran commented on HDFS-8880: -------------------------------------- I'd be in favour of improving our own general metrics sinks, rather than adding new stuff to every service # it just adds more stuff to maintain, to test, to document and debug # it's not broadly re-usable # it adds 1/thread service, which in test runs could be many more per vm. I note that Coda Hale metrics has a [stdout streamer|https://dropwizard.github.io/metrics/3.1.0/getting-started/] for such purposes. If we were to do things with metrics, codahale integration would seem a good strategy (though the transitive LGPL dependency on the ganglia reporter is something to be aware of) > NameNode metrics logging > ------------------------ > > Key: HDFS-8880 > URL: https://issues.apache.org/jira/browse/HDFS-8880 > Project: Hadoop HDFS > Issue Type: Improvement > Components: namenode > Reporter: Arpit Agarwal > Assignee: Arpit Agarwal > Fix For: 2.8.0 > > Attachments: HDFS-8880.01.patch, HDFS-8880.02.patch, HDFS-8880.03.patch, HDFS-8880.04.patch, namenode-metrics.log > > > The NameNode can periodically log metrics to help debugging when the cluster is not setup with another metrics monitoring scheme. -- This message was sent by Atlassian JIRA (v6.3.4#6332)