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 7D6E017D2C for ; Fri, 3 Oct 2014 19:48:35 +0000 (UTC) Received: (qmail 36045 invoked by uid 500); 3 Oct 2014 19:48:35 -0000 Delivered-To: apmail-hbase-issues-archive@hbase.apache.org Received: (qmail 36001 invoked by uid 500); 3 Oct 2014 19:48:35 -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 35990 invoked by uid 99); 3 Oct 2014 19:48:35 -0000 Received: from arcas.apache.org (HELO arcas.apache.org) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 03 Oct 2014 19:48:35 +0000 Date: Fri, 3 Oct 2014 19:48:35 +0000 (UTC) From: "Ted Yu (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=14158432#comment-14158432 ] Ted Yu commented on HBASE-12075: -------------------------------- I manually triggered QA run. See: https://builds.apache.org/job/PreCommit-HBASE-Build/11208/console Not sure why QA bot didn't pick up the latest patch. > 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: 0.99.0, 2.0.0, 0.98.6.1 > Reporter: Manukranth Kolloju > Assignee: Manukranth Kolloju > Attachments: 0001-Add-a-test-case-for-Preemptive-Fast-Fail.patch, 0001-HBASE-12075-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, 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)