What does ERR_SPDY_PROTOCOL_ERROR mean in nginx?

I came across this question when trying to find help for the problem I was facing with ERR_SPDY_PROTOCOL_ERROR on Chrome. Thought this might benefit others.

Our situation / solution: We use an AWS Application Load Balancer connected to EC2 instances. One of the scripts we run on EC2 proxies requests from the client browser. We recently updated the script – no relevant changes – and noticed that both Chrome and Safari requests to the proxy script started failing. Chrome showed the ERR_SPDY_PROTOCOL_ERROR error and, when we dug in to it, we could see this request was using HTTP/2. Firefox requests continued to work fine.

Our solution: we switched off HTTP/2 support in the ALB. Immediately solved the problem.

AWS CLI command:

aws elbv2 modify-load-balancer-attributes --load-balancer-arn <your_load_balancer_arn> --attributes Key=routing.http2.enabled,Value=false

Related Posts:

  1. How to restart Nginx on Mac OS X?
  2. When is K 1024 and when is it 1000?
  3. Dial pad to get phone number (with Android button images)
  4. Why is it not possible to fake an IP address?
  5. Authentication versus Authorization
  6. What is tail recursion?
  7. Visual List of iOS Fonts?
  8. How to get rid of the “No bootable medium found!” error in Virtual Box? [closed]
  9. 400 Bad Request – request header or cookie too large
  10. ‘git’ is not recognized as an internal or external command
  11. Flash Player Projector post 2020
  12. How to update multiple columns in single update statement in DB2
  13. what does the __file__ variable mean/do?
  14. Assembly’s manifest definition does not match assembly reference
  15. “unrecognized selector sent to instance” error in Objective-C
  16. Java – No enclosing instance of type Foo is accessible
  17. How to use PHP’s password_hash to hash and verify passwords
  18. How to create a custom coder?
  19. Git push won’t do anything (everything up-to-date)
  20. How to use vmImage on pipeline using Azure DevOps Server?
  21. git add . -> still “nothing to commit” with new files
  22. git submodule add error: does not have a commit checked out
  23. Background color for Tk in Python
  24. how to uninstall MinGW and make cygwin ‘make’ as deafult make program with gcc 3.8.1
  25. Cosine similarity and tf-idf
  26. Optional Parameters in Go?
  27. PostgreSQL: Remotely connecting to Postgres instance using psql command
  28. Android – Package Name convention
  29. How to execute an oracle stored procedure?
  30. Unable to convert 3d ply file image to 2d image
  31. Get a random item from a JavaScript array
  32. Plotting horizontal and vertical lines in Mathematica
  33. Error while waiting for device: Time out after 300seconds waiting for emulator to come online
  34. How to transparent Unity3D custom shader?
  35. Is it valid to have a html form inside another html form?
  36. How to verify if nginx is running or not?
  37. what is shortcut command to kill process in windows command?
  38. Differentiate between function overloading and function overriding
  39. How to print variable in sml?
  40. Why is the minidlna database not being refreshed?
  41. java.sql.SQLException: Fail to convert to internal representation
  42. Representing EOF in C code?
  43. An unhandled lowlevel error occurred. The application logs may have details
  44. What’s the difference between sx and σx in the statistics calculations on a TI-Nspire?
  45. Apache Kafka vs Apache Storm
  46. How can an Admin access the Google Drive contents of all the users in a particular domain?
  47. PSEXEC, access denied errors
  48. How do you define a global function in C++?
  49. A _disk_id.pod file appears on a windows flash drive
  50. What standard do language codes of the form “zh-Hans” belong to?
  51. What is the proof of of (N–1) + (N–2) + (N–3) + … + 1= N*(N–1)/2 
  52. Prompted for FTP details even with FS_DIRECT set to true
  53. Nginx – Prevent Access to Debug file [closed]
  54. W3 Total Cache Minify Rewrite Error with WordPress on nginx [closed]
  55. Merge posts plugin? [closed]
  56. Multisite WordPress nginx uploaded files throw 404
  57. 302 redirect to signup with nginx reverse proxy
  58. NGINX conf on WP Multisite enabled — subdirectory — images fail to load after updates
  59. wp-admin Redirects to Docker Container Name
  60. Permalinks keep reverting to 404 unless I re-save them
  61. How to run a subdirectory multisite install under a subdomain
  62. Infinite loop behind SSL proxy on non-standard port
  63. W3 Total Cache – Converting Apache rewrites to Nginx [closed]
  64. database collation differences
  65. WordPress Permalinks & Nginx Rewrite Rule Not Working
  66. Site resolves to www in Firefox and without in Chrome
  67. WordPress Nginx Won’t 404
  68. Add Woocommerce product to cart with Contact Form 7 [closed]
  69. How to See Everything in get_option()?
  70. Is it safe to give wordpress directories ownership to www-data?
  71. Username Variable in custom links?
  72. Something is injecting a slash after any static file response , server is nginx
  73. How to access wordpress from domainB which is installed at domainA
  74. 413 Request Entity Too Large nginx/1.18.0 (Ubuntu)
  75. How to hide subfolder of static pages in WordPress using htaccess
  76. Javascript: Add anchor hashtag to URL, and reload
  77. To remove rendering of menus and header, plugin or theme?
  78. How can I upgrade to Java 1.8 on an Amazon Linux Server?
  79. What port should I open to allow remote desktop?
  80. Can you help me with my capacity planning?
  81. Cheat Sheets for System Administrators?
  82. Amazon EC2 terminology – AMI vs. EBS vs. Snapshot vs. Volume
  83. How to change an EC2 instance’s security group
  84. What type of DNS record is needed to make a subdomain?
  85. Setting expires headers for static content served from nginx
  86. Multiple SSL domains on the same IP address and same port?
  87. What does this nginx error “rewrite or internal redirection cycle” mean?
  88. IPTABLES – Limit rate of a specific incoming IP
  89. How to set default Ansible username/password for SSH connection?
  90. Can I make `find` return non-0 when no matching files are found?
  91. How to use nested Nginx location blocks (prefixes vs. regex directives)?
  92. Proxy Error 502 “Reason: Error reading from remote server” with Apache 2.2.3 (Debian) mod_proxy and Jetty 6.1.18
  93. What is the difference between service and systemctl?
  94. Nginx Redirect via Proxy, Rewrite and Preserve URL
  95. Rsync creates a directory with the same name inside of destination directory
  96. How Often Do Windows Servers Need to be Restarted?
  97. sudoers: how to disable requiretty per user
  98. dig show only answer
  99. SSD or HDD for server
  100. Do you have any useful awk and grep scripts for parsing apache logs? [closed]

Leave a Comment