Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Robots.txt file getting a 500 error - is this a problem?
-
Hello all!
While doing some routine health checks on a few of our client sites, I spotted that a new client of ours - who's website was not designed built by us - is returning a 500 internal server error when I try to look at the robots.txt file.
As we don't host / maintain their site, I would have to go through their head office to get this changed, which isn't a problem but I just wanted to check whether this error will actually be having a negative effect on their site / whether there's a benefit to getting this changed?
Thanks in advance!
-
Hi Barry,
Thanks for your swift response on this. The pages certainly seem to be getting cached correctly, and when we initially took over the SEO and made wholesale changes to the site, there were huge improvements, so it looks for all the world like the main pages at least are being looked at.
But I think you make a good point about getting it solved anyway so we can identify any problems that may be occurring / will occur later.
-
robots.txt isn't a requirement, indeed it's only voluntarily followed by spiders (as in they can choose to ignore it), so I think you'll be fine without it. The default is to 'allow all' and 'follow, index', so they should still be crawling the site correctly.
Check in Webmaster tools by fetching as Googlebot or alternative find a page and put cache:pageurl.html into google and see if it's cached it correctly.
That said returning a 500 instead of a 404 may be causing an issue that isn't obviously apparent and 500 is a bit too generic a message to say specifically what, but I would try and solve it as quick as possible. The benefits will depends on what you put in your robots.txt file

Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Does anyone know the linking of hashtags on Wix sites does it negatively or postively impact SEO. It is coming up as an error in site crawls 'Pages with 404 errors' Anyone got any experience please?
Does anyone know the linking of hashtags on Wix sites does it negatively or positively impact SEO. It is coming up as an error in site crawls 'Pages with 404 errors' Anyone got any experience please? For example at the bottom of this blog post https://www.poppyandperle.com/post/face-painting-a-global-language the hashtags are linked, but they don't go to a page, they go to search results of all other blogs using that hashtag. Seems a bit of a strange approach to me.
Technical SEO | | Mediaholix0 -
Robots.txt in subfolders and hreflang issues
A client recently rolled out their UK business to the US. They decided to deploy with 2 WordPress installations: UK site - https://www.clientname.com/uk/ - robots.txt location: UK site - https://www.clientname.com/uk/robots.txt
Technical SEO | | lauralou82
US site - https://www.clientname.com/us/ - robots.txt location: UK site - https://www.clientname.com/us/robots.txt We've had various issues with /us/ pages being indexed in Google UK, and /uk/ pages being indexed in Google US. They have the following hreflang tags across all pages: We changed the x-default page to .com 2 weeks ago (we've tried both /uk/ and /us/ previously). Search Console says there are no hreflang tags at all. Additionally, we have a robots.txt file on each site which has a link to the corresponding sitemap files, but when viewing the robots.txt tester on Search Console, each property shows the robots.txt file for https://www.clientname.com only, even though when you actually navigate to this URL (https://www.clientname.com/robots.txt) you’ll get redirected to either https://www.clientname.com/uk/robots.txt or https://www.clientname.com/us/robots.txt depending on your location. Any suggestions how we can remove UK listings from Google US and vice versa?0 -
?_escaped_fragment_= Duplicate error in Webmaster
Hi I am not sure where this came from ... ?escaped_fragment= But in webmaster we are seeing hundreds of pages with this and thus webmaster is saying that we have Pages with duplicate title tags How do I fix this, or remove it. Regards T
Technical SEO | | Taiger0 -
Www2 vs www problem
Hi, I have a website that has an old version and a new version. The content is not duplicate on the different versions.
Technical SEO | | TihomirPetrov
The point is that the old version uses www. and non-www before the domain and the new one uses www2. My questions is: Is that a problem and what should be done? Thank you in advance!0 -
429 Errors?
I have over 500,000 429 errors in webmaster tools. Do I need to be concerned about these errors?
Technical SEO | | TheKrazyCouponLady0 -
No indexing url including query string with Robots txt
Dear all, how can I block url/pages with query strings like page.html?dir=asc&order=name with robots txt? Thanks!
Technical SEO | | HMK-NL0 -
Converting files from .html to .php or editing .htaccess file
Good day all, I have a bunch of files that are .html and I want to add some .php to them. It seems my 2 options are Convert .html to .php and 301 redirect or add this line of code to my .htaccess file and keep all files that are .html as .html AddType application/x-httpd-php .html My gut is that the 2nd way is better so as not alter any SEO rankings, but wanted to see if anybody had any experience with this line of code in their .htaccess file as definitely don't wan to mess up my entire site 🙂 Thanks for any help! John
Technical SEO | | JohnHerrigel0 -
Invisible robots.txt?
So here's a weird one... Client comes to me for some simple changes, turns out there are some major issues with the site, one of which is that none of the correct content pages are showing up in Google, just ancillary (outdated) ones. Looks like an issue because even the main homepage isn't showing up with a "site:domain.com" So, I add to Webmaster Tools and, after an hour or so, I get the red bar of doom, "robots.txt is blocking important pages." I check it out in Webmasters and, sure enough, it's a "User agent: * Disallow /" ACK! But wait... there's no robots.txt to be found on the server. I can go to domain.com/robots.txt and see it but nothing via FTP. I upload a new one and, thankfully, that is now showing but I've never seen that before. Question is: can a robots.txt file be stored in a way that can't be seen? Thanks!
Technical SEO | | joshcanhelp0