• majorAlexa

        See all notifications

        Skip to content
        Moz logo Menu open Menu close
        • Products
          • Moz Pro
          • Moz Pro Home
          • Moz Local
          • Moz Local Home
          • STAT
          • Moz API
          • Moz API Home
          • Compare SEO Products
          • Moz Data
        • Free SEO Tools
          • Domain Analysis
          • Keyword Explorer
          • Link Explorer
          • Competitive Research
          • MozBar
          • More Free SEO Tools
        • Learn SEO
          • Beginner's Guide to SEO
          • SEO Learning Center
          • Moz Academy
          • MozCon
          • Webinars, Whitepapers, & Guides
        • Blog
        • Why Moz
          • Digital Marketers
          • Agency Solutions
          • Enterprise Solutions
          • Small Business Solutions
          • The Moz Story
          • New Releases
        • Log in
        • Log out
        • Products
          • Moz Pro

            Your all-in-one suite of SEO essentials.

          • Moz Local

            Raise your local SEO visibility with complete local SEO management.

          • STAT

            SERP tracking and analytics for enterprise SEO experts.

          • Moz API

            Power your SEO with our index of over 44 trillion links.

          • Compare SEO Products

            See which Moz SEO solution best meets your business needs.

          • Moz Data

            Power your SEO strategy & AI models with custom data solutions.

          Let your business shine with Listings AI
          Moz Local

          Let your business shine with Listings AI

          Learn more
        • Free SEO Tools
          • Domain Analysis

            Get top competitive SEO metrics like DA, top pages and more.

          • Keyword Explorer

            Find traffic-driving keywords with our 1.25 billion+ keyword index.

          • Link Explorer

            Explore over 40 trillion links for powerful backlink data.

          • Competitive Research

            Uncover valuable insights on your organic search competitors.

          • MozBar

            See top SEO metrics for free as you browse the web.

          • More Free SEO Tools

            Explore all the free SEO tools Moz has to offer.

          NEW Keyword Suggestions by Topic
          Moz Pro

          NEW Keyword Suggestions by Topic

          Learn more
        • Learn SEO
          • Beginner's Guide to SEO

            The #1 most popular introduction to SEO, trusted by millions.

          • SEO Learning Center

            Broaden your knowledge with SEO resources for all skill levels.

          • On-Demand Webinars

            Learn modern SEO best practices from industry experts.

          • How-To Guides

            Step-by-step guides to search success from the authority on SEO.

          • Moz Academy

            Upskill and get certified with on-demand courses & certifications.

          • MozCon

            Save on Early Bird tickets and join us in London or New York City

          Unlock flexible pricing & new endpoints
          Moz API

          Unlock flexible pricing & new endpoints

          Find your plan
        • Blog
        • Why Moz
          • Digital Marketers

            Simplify SEO tasks to save time and grow your traffic.

          • Small Business Solutions

            Uncover insights to make smarter marketing decisions in less time.

          • Agency Solutions

            Earn & keep valuable clients with unparalleled data & insights.

          • Enterprise Solutions

            Gain a competitive edge in the ever-changing world of search.

          • The Moz Story

            Moz was the first & remains the most trusted SEO company.

          • New Releases

            Get the scoop on the latest and greatest from Moz.

          Surface actionable competitive intel
          New Feature

          Surface actionable competitive intel

          Learn More
        • Log in
          • Moz Pro
          • Moz Local
          • Moz Local Dashboard
          • Moz API
          • Moz API Dashboard
          • Moz Academy
        • Avatar
          • Moz Home
          • Notifications
          • Account & Billing
          • Manage Users
          • Community Profile
          • My Q&A
          • My Videos
          • Log Out

        The Moz Q&A Forum

        • Forum
        • Questions
        • My Q&A
        • Users
        • Ask the Community

        Welcome to the Q&A Forum

        Browse the forum for helpful insights and fresh discussions about all things SEO.

        1. Home
        2. SEO Tactics
        3. Technical SEO
        4. Intermittent 404 - What causes them and how to fix?

        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.

        Intermittent 404 - What causes them and how to fix?

        Technical SEO
        2
        2
        2053
        Loading More Posts
        • Watching

          Notify me of new replies.
          Show question in unread.

        • Not Watching

          Do not notify me of new replies.
          Show question in unread if category is not ignored.

        • Ignoring

          Do not notify me of new replies.
          Do not show question in unread.

        • Oldest to Newest
        • Newest to Oldest
        • Most Votes
        Reply
        • Reply as question
        Locked
        This topic has been deleted. Only users with question management privileges can see it.
        • daniel-brooks
          daniel-brooks Subscriber last edited by

          Hi!

          I'm working on a client site at the moment and I've discovered a couple of pages that are 404ing but producing a 200 OK response.

          However, I have checked these URLs again and some are now producing a 404 Error response. No changes have been made (that I'm aware of) so it appears that the URLs are returning both 200 OK and 404 Error responses intermittently.

          Any ideas what could cause this and the best solution?

          Thanks!

          1 Reply Last reply Reply Quote 0
          • seanginnaw
            seanginnaw last edited by

            Hi Daniel,

            That does seem very odd!

            There can be various different things at play here in my experience:

            1. Publishing and un-publishing in the CMS - Sometimes clients and CMS users will switch the page publish status around which can make it difficult to keep track of whether the page exists or not
            2. Removal of redirects - Much the same as above, there's the possibility that someone is adding/removing redirects. This could also be something to do with the removal of the server level redirects file, be that htaccess or IIS.
            3. Crawling tool issue - If you're using a crawling tool (especially if doing so with JS rendering active), sometimes this can put a lot of pressure on the server and it can spit out the occasional error where there actually isn't one

            It could also be a problem with how you're handing hard 404 errors vs soft 404s - i.e. actual not founds vs pages that don't function but the server is under the impression that they're fine.

            Best of luck!

            Sean

            1 Reply Last reply Reply Quote 0
            • 1 / 1
            • First post
              Last post

            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.

            • See all categories

            Related Questions

            • Taysir

              Cookies disabled pointing to a 404 page

              Hi mozzers, I am running an audit and disabled cookies on our homepage for testing purposes, this pointed to a 404 http response? I tried on other pages and they were loading correctly. I assume this is not normal? Why this is happening?  and could this harm the site's SEO? Thanks!

              Technical SEO | | Taysir
              0
            • AaronHenry

              WPEngine Causing Redirect Chain

              Hi guys, Had a quick question that I wanted to verify here. After reviewing a Moz report we received some redirect chain error on all of our sites hosted with WPEngine. We noticed that the redirect chain appears to be coming from how the domains are configured in their control panel. Essentially, there is a redirect: from staging/temp -> to live from non-www -> to www SSL redirect from http -> https The issue here is that the non-www is redirecting to www and then redirected again to https://www According to support the only way to get rid of this error is to drop the www version of the domain and to host everything under https://domain.com. To me it seems very odd that you cannot just go from http://non-www to https://www in just 1 301 redirect. Has anyone else experienced this or am I just not looking at the situation correctly?

              Technical SEO | | AaronHenry
              0
            • O2C

              Find all external 404 errors/links?

              Hi All, We have recently discovered a site was linking to our site but it was linking to an incorrect url, resulting in a 404 error. We had only found this by pure chance and wondered if there was a tool out there that will tell us when a site is linking to an incorrect url on our site? Thanks 🙂

              Technical SEO | | O2C
              0
            • MichaelGregory

              Hundreds of 404 errors are showing up for pages that never existed

              For our site, Google is suddenly reporting hundreds of 404 errors, but the pages they are reporting never existed. The links Google shows are clearly spam style,  but the website hasn't been hacked. This happened a few weeks ago, and after a couple days they disappeared from WMT. What's the deal? Screen-Shot-2016-02-29-at-9.35.18-AM.png

              Technical SEO | | MichaelGregory
              0
            • MJTrevens

              Soft 404's on a 301 Redirect...Why?

              So we launched a site about a month ago. Our old site had an extensive library of health content that went away with the relaunch. We redirected this entire section of the site to the new education materials, but we've yet to see this reflected in the index or in GWT. In fact, we're getting close to 500 soft 404's in GWT. Our development team confirmed for me that the 301 redirect is configured correctly. Is it just a waiting game at this point or is there something I might be missing? Any help is appreciated. Thanks!

              Technical SEO | | MJTrevens
              0
            • Taswirh

              Expired domain 404 crawl error

              I recently purchased a Expired domain from auction and after I started my new site on it, I am noticing 500+ "not found" errors in Google Webmaster Tools, which are generating from the previous owner's contents.Should I use a redirection plugin to redirect those non-exist posts to any new post(s) of my site? or I should use a 301 redirect? or I should leave them just as it is without taking further action? Please advise.

              Technical SEO | | Taswirh
              1
            • Gotmoxie

              How do I fix a 301 Redirect Loop?

              Saturday I waas doing some correcting of some duplicate titles, including nofollowing tags, etc. (my main problem was duplicate titles due to tags and categories being indexed). Now this morning I see that one of my pages refuses to load, citing a 301 redirect loop. http://www.incredibleinfant.com/feeding/switching-baby-formula/ Originally, the page was posted under the wrong category. http://www.incredibleinfant.com/uncategorized/switching-baby-formula I resaved it under the correct category (feeding) and now it won't load. Can someone help me figure out how to correct this mess? Thanks so much Heather

              Technical SEO | | Gotmoxie
              0
            • SuperMikeLewis

              Googlebot Crawl Rate causing site slowdown

              I am hearing from my IT department that Googlebot is causing as massive slowdown/crash our site. We get 3.5 to 4 million pageviews a month and add 70-100 new articles on the website each day. We provide daily stock research and marke analysis, so its all high quality relevant content. Here are the crawl stats from WMT: http://imgur.com/dyIbf I have not worked with a lot of high volume high traffic sites before, but these crawl stats do not seem to be out of line. My team is getting pressure from the sysadmins to slow down the crawl rate, or block some or all of the site from GoogleBot. Do these crawl stats seem in line with sites? Would slowing down crawl rates have a big effect on rankings? Thanks

              Technical SEO | | SuperMikeLewis
              0

            Get started with Moz Pro!

            Unlock the power of advanced SEO tools and data-driven insights.

            Start my free trial
            Products
            • Moz Pro
            • Moz Local
            • Moz API
            • Moz Data
            • STAT
            • Product Updates
            Moz Solutions
            • SMB Solutions
            • Agency Solutions
            • Enterprise Solutions
            • Digital Marketers
            Free SEO Tools
            • Domain Authority Checker
            • Link Explorer
            • Keyword Explorer
            • Competitive Research
            • Brand Authority Checker
            • Local Citation Checker
            • MozBar Extension
            • MozCast
            Resources
            • Blog
            • SEO Learning Center
            • Help Hub
            • Beginner's Guide to SEO
            • How-to Guides
            • Moz Academy
            • API Docs
            About Moz
            • About
            • Team
            • Careers
            • Contact
            Why Moz
            • Case Studies
            • Testimonials
            Get Involved
            • Become an Affiliate
            • MozCon
            • Webinars
            • Practical Marketer Series
            • MozPod
            Connect with us

            Contact the Help team

            Join our newsletter
            Moz logo
            © 2021 - 2025 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
            • Accessibility
            • Terms of Use
            • Privacy

            Looks like your connection to Moz was lost, please wait while we try to reconnect.