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I use chrome browser. And I get ERR_SPDY_PROTOCOL_ERROR really often, but on wikipedia and facebook only.

If this happens, I have to navigate to: chrome://net-internals/#events&q=type:SPDY_SESSION%20is:active and flush sockets

But it happens really often. How is it possible to permanently fix it?

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  • Why the downvote? The Web Applications site users told me, to ask it here
    – Iter Ator
    Commented Jan 3, 2016 at 15:04
  • 1
    are you using any antivirus software?
    – doenoe
    Commented Jan 5, 2016 at 11:45
  • yes, avast. But after I've disabled it's browser plugin, I still get the error
    – Iter Ator
    Commented Jan 5, 2016 at 13:50
  • try to add the websites, to which you’re getting the error to the Web Shield exclusions and test again if the error still resides
    – doenoe
    Commented Jan 5, 2016 at 14:10

4 Answers 4

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SPDY is a protocol developed by Google in order to reduce web page load latency and to improve web security. Currently, the SPDY protocol is deprecated as the HTTP/2 protocol has been ratified, so Google announced they won't support SPDY anymore.

Although this issue has been repeatidly notified, it seems Google has not acknowledged this as a bug and there is not a permanent workaround to fix it.

However, there seems to be a relationship between this issue and using some antivirus/firewall software, especially Avast antivirus. Some users have reported to uninstall Avast and not having issues since.

Some others have reported to add a URL exclusion at the Web Shield of Avast and to get rid of the error as well.

To do so, you can follow this:

Settings > Active Protection > Customize Web Shield > Exclusions > Add https://facebook.com/*

Also, it seems to affect secure sites (HTTPS) more than insecure, as far as I could see.

Hopefully, if Google is not supporting SPDY anymore they will update their browser soon and users will get rid of it.

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There is lots of advice about how to deal with this problem. I list below the advice I found, but you might need to go through all of them in order to solve the problem.

  1. Clear history/cookie/data
    This is done via menu access, or in the browser address bar: chrome://settings/clearBrowserData and use "From beginning of time". More info is found here.

  2. Clear host cache
    Type in browser address bar: chrome://net-internals/#dns and click "Clear Host Cache".

  3. Close and flush sockets
    Type in browser address bar: chrome://net-internals/#sockets and click "Close Idle Sockets" and "Flush Socket Pools".

  4. Clear DNS cache
    If you are using Windows, run as administrator the Command Prompt (cmd) and enter the commands : ipconfig /flushdns and ipconfig /release.

  5. Run the Chrome Cleanup Tool
    If using Windows, run the Chrome Cleanup Tool.

  6. Last is completely uninstalling Chrome, cleaning up all folders, then reinstalling the latest version.

If nothing helps, or the problem only stays fixed for a short time and then returns again and again, you might consider using another browser.

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There are many working ways to fix these errors, You can any one and can fix very easily, Mostly it can fix by

  1. Updating Google Chrome Browser
  2. Flush the Socket Solution
  3. Clear Cookies
  4. Restart Browser

If still problem not solve then try manually for more Chrome fixes.

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There is no one single fix for this error. But you can try the ‘Clear Browsing Data’ method as it is mostly happening due to cookies.

  1. Open browser and go to settings.
  2. Now click on Show Advanced Settings.
  3. Select Clear Browsing Data.
  4. Restart your browser and done.

You can try more from this tutorial if the error is still showing.

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