Return-Path: X-Original-To: apmail-hbase-issues-archive@www.apache.org Delivered-To: apmail-hbase-issues-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 3865317D91 for ; Mon, 29 Sep 2014 19:00:35 +0000 (UTC) Received: (qmail 37839 invoked by uid 500); 29 Sep 2014 19:00:35 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 37793 invoked by uid 500); 29 Sep 2014 19:00:35 -0000 Mailing-List: contact issues-help@hbase.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Delivered-To: mailing list issues@hbase.apache.org Received: (qmail 37729 invoked by uid 99); 29 Sep 2014 19:00:35 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 29 Sep 2014 19:00:35 +0000 Date: Mon, 29 Sep 2014 19:00:34 +0000 (UTC) From: "Manukranth Kolloju (JIRA)" To: issues@hbase.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Commented] (HBASE-12075) Preemptive Fast Fail 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/HBASE-12075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14152072#comment-14152072 ] Manukranth Kolloju commented on HBASE-12075: -------------------------------------------- Created a phabricator diff to facilitate the review : https://reviews.facebook.net/D24177 > Preemptive Fast Fail > -------------------- > > Key: HBASE-12075 > URL: https://issues.apache.org/jira/browse/HBASE-12075 > Project: HBase > Issue Type: Sub-task > Components: Client > Affects Versions: 1.0.0 > Reporter: Manukranth Kolloju > Assignee: Manukranth Kolloju > Fix For: 1.0.0 > > Attachments: 0001-Add-a-test-case-for-Preemptive-Fast-Fail.patch, 0001-Implement-Preemptive-Fast-Fail.patch, 0001-Implement-Preemptive-Fast-Fail.patch, 0001-Implement-Preemptive-Fast-Fail.patch, 0001-Implement-Preemptive-Fast-Fail.patch, 0001-Implement-Preemptive-Fast-Fail.patch > > > In multi threaded clients, we use a feature developed on 0.89-fb branch called Preemptive Fast Fail. This allows the client threads which would potentially fail, fail fast. The idea behind this feature is that we allow, among the hundreds of client threads, one thread to try and establish connection with the regionserver and if that succeeds, we mark it as a live node again. Meanwhile, other threads which are trying to establish connection to the same server would ideally go into the timeouts which is effectively unfruitful. We can in those cases return appropriate exceptions to those clients instead of letting them retry. -- This message was sent by Atlassian JIRA (v6.3.4#6332)