-------------------------------------------- On Thu, 12/8/16, Ben Noordhuis <[email protected]> wrote:
Subject: Re: [nodejs] Implications of running node with --debug argument To: [email protected] Date: Thursday, December 8, 2016, 2:15 PM On Wed, Dec 7, 2016 at 6:03 PM, Bill Klein <[email protected]> wrote: > I have a bug in my node server that I'm trying to track down. Unfortunately > it happens rarely and, so far, only on production. > > Therefore, I would like to be able to attach a debugger to my server > retrospectively, after the problem occurs. > > What are the implications of running a production node server with the > --debug argument (without an attached debugger)? Performance? Security? > > Thanks. Depending on the node version, the debugger listens either on 127.0.0.1 or 0.0.0.0. Address 0.0.0.0, a.k.a. the 'any' address, is a security liability if TCP ports 5858 and 9229 are accessible from the internet. The latest node v4 and v6 support `--debug=127.0.0.1:5858` syntax. Node v7 does too but it listens on 127.0.0.1 by default (v4 and v6 listen on 0.0.0.0.) Performance-wise --debug doesn't make a difference until the debugger is activated. When you stop debugging, the program resumes running at full speed again. Debugged functions are deoptimized but are optimized again through the usual process. -- Job board: http://jobs.nodejs.org/ New group rules: https://gist.github.com/othiym23/9886289#file-moderation-policy-md Old group rules: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nodejs/CAHQurc_AUvAK7XVCT_RbcGrmHofEa-U9U-PPipW8VxwByqODLA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout. acea de la Brest-Litovsk din 18 februarie 3 martie 1918 intre Rusia 'ietica si Puterile Centrale si intrarea trupelor germane in Ucraina au lasat mania total descoperita in fata Puterilor Centrale si inconjurata din toate Iile de dusmani. intre lunile decembrie 1917 si mai 1918 au avut loc ivorbiri pentru incheierea pacii intre Romania si Puterile Centrale. in cadrul -- Job board: http://jobs.nodejs.org/ New group rules: https://gist.github.com/othiym23/9886289#file-moderation-policy-md Old group rules: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nodejs/1552064820.90736.1481324200294%40mail.yahoo.com. For more options, visit https://groups.google.com/d/optout.
