From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD, FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,8c564a80b820db35 X-Google-NewGroupId: yes X-Google-Attributes: gida07f3367d7,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII Received: by 10.68.189.197 with SMTP id gk5mr12298741pbc.1.1330945649510; Mon, 05 Mar 2012 03:07:29 -0800 (PST) Path: h9ni41761pbe.0!nntp.google.com!news1.google.com!postnews.google.com!9g2000vbq.googlegroups.com!not-for-mail From: tonyg Newsgroups: comp.lang.ada Subject: Re: Any leap year issues caused by Ada yesterday? Date: Mon, 5 Mar 2012 03:07:29 -0800 (PST) Organization: http://groups.google.com Message-ID: References: <4f4f746a$0$6565$9b4e6d93@newsspool3.arcor-online.net> NNTP-Posting-Host: 195.58.145.51 Mime-Version: 1.0 X-Trace: posting.google.com 1330945649 25760 127.0.0.1 (5 Mar 2012 11:07:29 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Mon, 5 Mar 2012 11:07:29 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: 9g2000vbq.googlegroups.com; posting-host=195.58.145.51; posting-account=28F2IwkAAACL1Z5nRC-dE7zuvWdbWC7P User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux x86_64; en-GB; rv:1.9.1.16) Gecko/20120131 Iceweasel/3.5.16 (like Firefox/3.5.16),gzip(gfe) Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Date: 2012-03-05T03:07:29-08:00 List-Id: On Mar 1, 1:06=A0pm, Georg Bauhaus wrote: > News travels the wires of the internet telling us about MS Azure outages > in several places. These were seemingly caused by a piece of software > handling calendar dates involving February 29, 2012. > > =A0Which makes me think, presuming it is as simple as it looks, > is there a software setup that prevents this kind of damage by > definition? > > (The bigger companies are too big fail just because of a software bug, > even if it is of the ravenous bugblatter beast of Traal kind. > Maybe a bug that was fixed is even generating attention. > But it might help the businesses surviving only if such things do not > happen ... again.) > > From [1]: > "Yesterday, February 28th, 2012 at 5:45 PM PST Windows Azure operations > became aware of an issue impacting the compute service in a number of > regions. =A0The issue was quickly triaged and it was determined to be cau= sed by > a software bug. =A0While final root cause analysis is in progress, this i= ssue > appears to be due to a time calculation that was incorrect for the leap > year. Once we discovered the issue we immediately took steps to protect > customer services that were already up and running, and began creating a = fix > for the issue. =A0The fix was successfully deployed to most of the Window= s > Azure sub-regions and we restored Windows Azure service availability to t= he > majority of our customers and services by 2:57AM PST, Feb 29th." > > http://blogs.msdn.com/b/windowsazure/archive/2012/03/01/windows-azure... > > via > > http://www.forbes.com/sites/ciocentral/2012/02/29/microsoft-windows-a... Personally I deal with it by using the ada.calendar package rather than writing my own. I hope that answers your question.