Return-Path: Delivered-To: apmail-lucene-hadoop-dev-archive@locus.apache.org Received: (qmail 20808 invoked from network); 1 Oct 2007 18:49:05 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 1 Oct 2007 18:49:05 -0000 Received: (qmail 18536 invoked by uid 500); 1 Oct 2007 18:48:54 -0000 Delivered-To: apmail-lucene-hadoop-dev-archive@lucene.apache.org Received: (qmail 18499 invoked by uid 500); 1 Oct 2007 18:48:54 -0000 Mailing-List: contact hadoop-dev-help@lucene.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: hadoop-dev@lucene.apache.org Delivered-To: mailing list hadoop-dev@lucene.apache.org Received: (qmail 18490 invoked by uid 99); 1 Oct 2007 18:48:54 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Oct 2007 11:48:54 -0700 X-ASF-Spam-Status: No, hits=2.4 required=10.0 tests=DNS_FROM_DOB,RCVD_IN_DOB,SPF_NEUTRAL X-Spam-Check-By: apache.org Received-SPF: neutral (athena.apache.org: local policy) Received: from [206.18.177.55] (HELO alnrmhc15.comcast.net) (206.18.177.55) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 01 Oct 2007 18:48:55 +0000 Received: from [192.168.168.15] (c-76-103-190-170.hsd1.ca.comcast.net[76.103.190.170]) by comcast.net (alnrmhc15) with ESMTP id <20071001184833b15003f9p9e>; Mon, 1 Oct 2007 18:48:34 +0000 Message-ID: <47014100.3020901@apache.org> Date: Mon, 01 Oct 2007 11:48:32 -0700 From: Doug Cutting User-Agent: Thunderbird 1.5.0.13 (X11/20070824) MIME-Version: 1.0 To: hadoop-dev@lucene.apache.org Subject: Re: JCL vs SLF4J References: <005401c7c91a$f62e9890$eb44420a@ds.corp.yahoo.com> <46FD388D.7080500@duboce.net> <46FD85E3.5070907@duboce.net> <470127BC.4000404@apache.org> <470137FD.6020008@duboce.net> In-Reply-To: <470137FD.6020008@duboce.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Checked: Checked by ClamAV on apache.org Michael Stack wrote: > Doug Cutting wrote: >> I have used the JVM's built-in logging and found it lacking. > Do you remember what the holes in JUL were? Sorry, I don't remember all the details. I note that Hadoop uses log4j's DailyRollingFileAppender, and nothing like that is present in JUL. And log4j's formatting options are much more sophisticated than JUL's SimpleFormatter. Also, with log4j, it's easy to configure debug logging for a subset of code, based on package wildcards. Such things can be accomplished with JUL, but through the addition of code, while log4j moves most of that to the config. Doug