WebSocketException: Connection to 'https://<domain>.com:0/hasura/v1/graphql#' was not upgraded to websocket

[sharad-paghadal]

Query and mutation are working perfectly, but when it comes to subscription - it throws this error on console.

[sharad-paghadal]

I found temporary solution!

Issue:

• My hasura is deployed using docker and that is serving by nginx to add https.
• So my hasura connection url will be like -https://mydomain.com/hasura/v1/graphql
• In this case it takes 0 as a port, that is causing this issue.

Solution:

• Using url https://<IP>:<PORT_USED_BY_DOCKER>/hasura/v1/graphql fixed the issue.

This is temporary solution, some one please help me to fix it permanently.
Thanks.

[jeet-ardeshna-stl]

I was facing the same issue, but I solved it by removing a trailing '/' from the URL. ( '.../graphql/' to '.../graphql')

[raphaelbarbosaqwerty]

@sharad-paghadal Hi! What is your back-end? Actually, I got the same problem with Nginx, I found the solution in this Issue. Check on Hasura Documentation too.