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 1788D1873E for ; Wed, 14 Oct 2015 09:09:06 +0000 (UTC) Received: (qmail 60628 invoked by uid 500); 14 Oct 2015 09:09:05 -0000 Delivered-To: apmail-hadoop-hdfs-issues-archive@hadoop.apache.org Received: (qmail 60571 invoked by uid 500); 14 Oct 2015 09:09:05 -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 60336 invoked by uid 99); 14 Oct 2015 09:09:05 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 14 Oct 2015 09:09:05 +0000 Date: Wed, 14 Oct 2015 09:09:05 +0000 (UTC) From: "Steve Loughran (JIRA)" To: hdfs-issues@hadoop.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HDFS-9239) DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness 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-9239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14956523#comment-14956523 ] Steve Loughran commented on HDFS-9239: -------------------------------------- Does this actually need RPC? Or could some UDP packet be submitted, with the recipient doing an initial auth check of the sender, then queuing it to update the internal state. After all, this is intended to be one-way announcements > DataNode Lifeline Protocol: an alternative protocol for reporting DataNode liveness > ----------------------------------------------------------------------------------- > > Key: HDFS-9239 > URL: https://issues.apache.org/jira/browse/HDFS-9239 > Project: Hadoop HDFS > Issue Type: New Feature > Components: datanode, namenode > Reporter: Chris Nauroth > Assignee: Chris Nauroth > Attachments: DataNode-Lifeline-Protocol.pdf > > > This issue proposes introduction of a new feature: the DataNode Lifeline Protocol. This is an RPC protocol that is responsible for reporting liveness and basic health information about a DataNode to a NameNode. Compared to the existing heartbeat messages, it is lightweight and not prone to resource contention problems that can harm accurate tracking of DataNode liveness currently. The attached design document contains more details. -- This message was sent by Atlassian JIRA (v6.3.4#6332)