Return-Path: X-Original-To: apmail-flink-issues-archive@minotaur.apache.org Delivered-To: apmail-flink-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 3540418ED1 for ; Tue, 26 Jan 2016 09:38:40 +0000 (UTC) Received: (qmail 60610 invoked by uid 500); 26 Jan 2016 09:38:40 -0000 Delivered-To: apmail-flink-issues-archive@flink.apache.org Received: (qmail 60559 invoked by uid 500); 26 Jan 2016 09:38:40 -0000 Mailing-List: contact issues-help@flink.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@flink.apache.org Delivered-To: mailing list issues@flink.apache.org Received: (qmail 60538 invoked by uid 99); 26 Jan 2016 09:38:40 -0000 Received: from arcas.apache.org (HELO arcas) (140.211.11.28) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 26 Jan 2016 09:38:40 +0000 Received: from arcas.apache.org (localhost [127.0.0.1]) by arcas (Postfix) with ESMTP id E1C0F2C1F68 for ; Tue, 26 Jan 2016 09:38:39 +0000 (UTC) Date: Tue, 26 Jan 2016 09:38:39 +0000 (UTC) From: "Kostas (JIRA)" To: issues@flink.apache.org Message-ID: In-Reply-To: References: Subject: [jira] [Assigned] (FLINK-3254) CombineFunction interface not respected 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/FLINK-3254?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Kostas reassigned FLINK-3254: ----------------------------- Assignee: Kostas > CombineFunction interface not respected > --------------------------------------- > > Key: FLINK-3254 > URL: https://issues.apache.org/jira/browse/FLINK-3254 > Project: Flink > Issue Type: Bug > Components: DataSet API > Affects Versions: 1.0.0, 0.10.1 > Reporter: Fabian Hueske > Assignee: Kostas > Priority: Blocker > Fix For: 1.0.0 > > > The DataSet API offers a {{CombineFunction}} interface, which differs from the {{GroupCombineFunction}} interface by being restricted to return a single value instead of returning arbitrary many values through a {{Collector}}. > The JavaDocs of the {{GroupCombineFunction}} point to the {{CombineFunction}} interface, advertising it as more efficient. > However, the {{CombineFunction}} interface is nor respected by Flink, i.e., a {{GroupReduceFunction}} that implements this interface is executed without leveraging the combine method. -- This message was sent by Atlassian JIRA (v6.3.4#6332)