Return-Path: X-Original-To: apmail-giraph-user-archive@www.apache.org Delivered-To: apmail-giraph-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 3A22110CCC for ; Mon, 17 Feb 2014 12:21:52 +0000 (UTC) Received: (qmail 52611 invoked by uid 500); 17 Feb 2014 12:21:45 -0000 Delivered-To: apmail-giraph-user-archive@giraph.apache.org Received: (qmail 52364 invoked by uid 500); 17 Feb 2014 12:21:44 -0000 Mailing-List: contact user-help@giraph.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@giraph.apache.org Delivered-To: mailing list user@giraph.apache.org Received: (qmail 52353 invoked by uid 99); 17 Feb 2014 12:21:43 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 17 Feb 2014 12:21:43 +0000 X-ASF-Spam-Status: No, hits=1.5 required=5.0 tests=HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (nike.apache.org: domain of Lukas.Nalezenec@firma.seznam.cz designates 77.75.74.246 as permitted sender) Received: from [77.75.74.246] (HELO posta.szn.cz) (77.75.74.246) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 17 Feb 2014 12:21:36 +0000 Received: from [10.0.4.229] (10.0.4.229) by posta.szn.cz (10.0.3.149) with Microsoft SMTP Server id 14.3.174.1; Mon, 17 Feb 2014 13:21:14 +0100 Message-ID: <5301FEBA.2040608@firma.seznam.cz> Date: Mon, 17 Feb 2014 13:21:14 +0100 From: Lukas Nalezenec User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 MIME-Version: 1.0 To: Subject: Re: debugging graph-programs References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------030206020807000301080009" X-Originating-IP: [10.0.4.229] X-Virus-Checked: Checked by ClamAV on apache.org --------------030206020807000301080009 Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Hi, My two small hints are: 1. Dont use Giraph without memory profiler (Eclipse MAT). 2. Write unit tests. Lukas On 17.2.2014 13:07, Martin Neumann wrote: > Hej, > > I find Giraph programs quite difficult to debug (all I have is log > outputs). > Anyone has some hints for debugging tools or coding practices to make > it simpler? > > I'm using Giraph 1.1.0 trunk on YARN so I can't use Map/Reduce > debugging aids (at least I think so, I haven't tried any) > > cheers > Martin --------------030206020807000301080009 Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit
Hi,
My two small hints are:

1. Dont use Giraph without memory profiler (Eclipse MAT).
2. Write unit tests.

Lukas

On 17.2.2014 13:07, Martin Neumann wrote:
Hej,

I find Giraph programs quite difficult to debug (all I have is log outputs).
Anyone has some hints for debugging tools or coding practices to make it simpler?

I'm using Giraph 1.1.0 trunk on YARN so I can't use Map/Reduce debugging aids (at least I think so, I haven't tried any)

cheers
Martin

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