Return-Path: X-Original-To: archive-asf-public-internal@cust-asf2.ponee.io Delivered-To: archive-asf-public-internal@cust-asf2.ponee.io Received: from cust-asf.ponee.io (cust-asf.ponee.io [163.172.22.183]) by cust-asf2.ponee.io (Postfix) with ESMTP id 058552009A8 for ; Tue, 17 May 2016 09:48:18 +0200 (CEST) Received: by cust-asf.ponee.io (Postfix) id 026221609AE; Tue, 17 May 2016 07:48:18 +0000 (UTC) Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by cust-asf.ponee.io (Postfix) with SMTP id 4B2181609F5 for ; Tue, 17 May 2016 09:48:17 +0200 (CEST) Received: (qmail 30011 invoked by uid 500); 17 May 2016 07:48:16 -0000 Mailing-List: contact dev-help@gearpump.incubator.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@gearpump.incubator.apache.org Delivered-To: mailing list dev@gearpump.incubator.apache.org Received: (qmail 30000 invoked by uid 99); 17 May 2016 07:48:16 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 17 May 2016 07:48:16 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 23346C0C08 for ; Tue, 17 May 2016 07:48:16 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: -5.446 X-Spam-Level: X-Spam-Status: No, score=-5.446 tagged_above=-999 required=6.31 tests=[KAM_LAZY_DOMAIN_SECURITY=1, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, RP_MATCHES_RCVD=-1.426] autolearn=disabled Received: from mx2-lw-us.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id pTCCfDLHXLt1 for ; Tue, 17 May 2016 07:48:14 +0000 (UTC) Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx2-lw-us.apache.org (ASF Mail Server at mx2-lw-us.apache.org) with SMTP id B199D5F244 for ; Tue, 17 May 2016 07:48:13 +0000 (UTC) Received: (qmail 29844 invoked by uid 99); 17 May 2016 07:48:13 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 17 May 2016 07:48:13 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id E8C7A2C1F64 for ; Tue, 17 May 2016 07:48:12 +0000 (UTC) Date: Tue, 17 May 2016 07:48:12 +0000 (UTC) From: "Manu Zhang (JIRA)" To: dev@gearpump.incubator.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Updated] (GEARPUMP-78) Support DAG with cycles MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 archived-at: Tue, 17 May 2016 07:48:18 -0000 [ https://issues.apache.org/jira/browse/GEARPUMP-78?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Manu Zhang updated GEARPUMP-78: ------------------------------- Fix Version/s: 0.8.1 > Support DAG with cycles > ----------------------- > > Key: GEARPUMP-78 > URL: https://issues.apache.org/jira/browse/GEARPUMP-78 > Project: Apache Gearpump > Issue Type: Improvement > Components: streaming > Reporter: Manu Zhang > Assignee: Manu Zhang > Fix For: 0.8.1 > > > imported from [https://github.com/gearpump/gearpump/issues/1231] on behalf of [~clockfly], > DAG with loop should not be called DAG :) > We see use cases that require a feedback channel. > The challengues will be: > # how to support the low watermark clock? As the clock is defined recursively? > # How to support back-pressure. DAG with loop can possiblely create a live-lock issue. With each processor wait for acks from other processor before sending acks. -- This message was sent by Atlassian JIRA (v6.3.4#6332)