Batch write - not working

[rakeshparveen5]

I am getting StackOverflow exception when trying to commit a batch.

My code is as follows :-

 override suspend fun insertAll(list: List<PostSiteResponse>) {
        val userId = prefs.getCurrentUserId() ?: return

    val siteRef =    firestore.collection(FirebaseConstants.TABLE_USERS)
        .document(userId.toString())
        .collection(FirebaseConstants.TABLE_SITES)

    val batch = firestore.batch()

    list.forEach {
        val obj = it.toSite()
        val map = Mapper.mapNullable(obj)

        batch.set(siteRef.document(it.locationId.toString()), map , SetOptions.Merge)
    }

    batch.commit_()
}

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.guardso_new, PID: 28090
java.lang.StackOverflowError: stack size 8MB
at co.touchlab.firebase.firestore.WriteBatchKt.set(Unknown Source:2)
at co.touchlab.firebase.firestore.WriteBatchKt.set(WriteBatch.kt:14)