Apollo realtime subscription not working unless we remove "/connect" path

[niqo01]

Before opening, please confirm:

• I have searched for duplicate or closed issues and discussions.

Language and Async Model

Kotlin - Coroutines

Amplify Categories

GraphQL API

Gradle script dependencies

com.amplifyframework:apollo-appsync:1.2.0

Environment information

------------------------------------------------------------
Gradle 8.14.3
------------------------------------------------------------

Build time:    2025-07-04 13:15:44 UTC
Revision:      e5ee1df3d88b8ca3a8074787a94f373e3090e1db

Kotlin:        2.0.21
Groovy:        3.0.24
Ant:           Apache Ant(TM) version 1.10.15 compiled on August 25 2024
Launcher JVM:  21.0.7 (Azul Systems, Inc. 21.0.7+6-LTS)
Daemon JVM:    /Library/Java/JavaVirtualMachines/zulu-21.jdk/Contents/Home (no JDK specified, using current Java home)
OS:            Mac OS X 15.5 aarch64

Please include any relevant guides or documentation you're referencing

https://docs.amplify.aws/android/build-a-backend/data/aws-appsync-apollo-extensions/

Describe the bug

I am using AWS AppSync Apollo Extensions com.amplifyframework:apollo-appsync:1.2.0

I could not get the subscription part working, after debugging, cloning the repo and using chatgpt, I found out that if I remove "/connect" from the "realtime" url in the source code here:

amplify-android/apollo/apollo-appsync/src/main/java/com/amplifyframework/apollo/appsync/AppSyncEndpoint.kt

Line 58 in 8a8fcc4

URL("$realtime/connect")

Then subscription works fine. I don't know why.

Also, not sure if this is relevant but I am using HTTP header authorization instead of appending a query parameter.

I have spent many hours on this issue, if anyone else got it as well, you are welcome for the fix.

Reproduction steps (if applicable)

No response

Code Snippet

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Log output

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Configuration File

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GraphQL Schema

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Additional information and screenshots

No response

[tylerjroach]

Thank you for the report. We are researching now.

[mattcreaser]

Hi @niqo01, are you using a custom domain for your appsync instance?

[mattcreaser]

This has been fixed in Apollo AppSync Extensions 1.2.1 which is now available for use.

[github-actions]

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