DataStore errorHandler cannot capture asynchronous mutation errors

[HuiSF]

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

Language and Async Model

Java, Kotlin

Amplify Categories

DataStore

Gradle script dependencies

```groovy dependencies { implementation 'androidx.appcompat:appcompat:1.3.1' implementation 'com.google.android.material:material:1.4.0' implementation 'androidx.constraintlayout:constraintlayout:2.1.1' implementation 'com.amplifyframework:aws-api:1.31.2' implementation 'com.amplifyframework:aws-datastore:1.31.2' testImplementation 'junit:junit:4.+' androidTestImplementation 'androidx.test.ext:junit:1.1.3' androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0' } ```

Environment information

``` ------------------------------------------------------------ Gradle 6.7.1 ------------------------------------------------------------ Build time: 2020-11-16 17:09:24 UTC Revision: 2972ff02f3210d2ceed2f1ea880f026acfbab5c0 Kotlin: 1.3.72 Groovy: 2.5.12 Ant: Apache Ant(TM) version 1.10.8 compiled on May 10 2020 JVM: 1.8.0_292 (AdoptOpenJDK 25.292-b10) OS: Mac OS X 10.16 x86_64 ```

Please include any relevant guides or documentation you're referencing

No response

Describe the bug

DataStore allows developer to provide a custom errorHandler function. According to the library document, the errorHandler function is invoked for unrecoverable model synchronization errors. However, it never been invoked on any GraphQL error triggered my model mutation, and the library only prints an error log, but not providing an API to allow developers to catch this type off error.

Related amplify-ios issue: https://github.com/aws-amplify/amplify-ios/issues/1555

Reproduction steps (if applicable)

No response

Code Snippet

// Put your code below this line.

Log output

``` // Put your logs below this line ```

amplifyconfiguration.json

No response

GraphQL Schema

```graphql // Put your schema below this line ```

Additional information and screenshots

No response

[applyinnovations]

Hey @poojamat I have also logged the same issue on the amplify-js repository which is still open https://github.com/aws-amplify/amplify-js/issues/8891

[github-actions[bot]]

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