Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.8.3 (2017-05-23) Return-Path: Message-ID: <20170906095813.GA11220@jurassic> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mx.pao1.isc.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.0 References: <9a6a4b293befa8df0ec90ed6355bb07e@www.isc.org> To: "sauteeed via RT" content-type: text/plain; charset="utf-8" MIME-Version: 1.0 Date: Wed, 6 Sep 2017 15:28:13 +0530 Subject: Re: [ISC-Bugs #45904] BIND-9.9.6-P1 - error sending response: unset Delivered-To: bind9-confidential@bugs.isc.org Received: from mx.pao1.isc.org (mx.pao1.isc.org [149.20.64.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mx.pao1.isc.org", Issuer "COMODO RSA Organization Validation Secure Server CA" (not verified)) by bugs.isc.org (Postfix) with ESMTPS id 9C603D78AFE for ; Wed, 6 Sep 2017 09:58:22 +0000 (UTC) Received: from mail.banu.com (mail.banu.com [46.4.129.225]) by mx.pao1.isc.org (Postfix) with ESMTP id 2560F34BF2E for ; Wed, 6 Sep 2017 09:58:20 +0000 (UTC) Received: from jurassic (unknown [115.118.147.161]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.banu.com (Postfix) with ESMTPSA id 49E4B56A0842; Wed, 6 Sep 2017 09:58:17 +0000 (GMT) X-RT-Original-Encoding: utf-8 From muks@isc.org Wed Sep 6 09:58:22 2017 X-Original-To: bind9-confidential@bugs.isc.org X-RT-Interface: Email X-RT-Incoming-Encryption: Not encrypted From: "Mukund Sivaraman" RT-Message-ID: Content-Length: 920 On Mon, Sep 04, 2017 at 02:57:48AM +0000, sauteeed via RT wrote: > Software Version: BIND-9.9.6-P1 > OS: CentOS 6.4 > Subject:error sending response: unset > > > Bug Detail > =========== > Hi, > > I got 2 servers running the same version of BIND and OS, but one of > them periodically encounters the problem "error sending response: > unset", and when this took place, server just failed to send DNS > responses to the clients. I don't see any difference between these 2 > servers themselves. Maybe something outside could lead it to such a > case? 9.9.6-P1 is a very old version of BIND (nearly 3 years old). You should be using the latest release of BIND 9.9. For the log message you are seeing, please look at this knowledge base article: https://kb.isc.org/article/AA-00717 You may find it useful to email bind-users list where you might raise questions like this, instead of creating bug tickets. Mukund