Using dgo v2 clinet to do multiple queries then mutate in same txn cause "Transaction has already been committed or discarded" error

Users
1

Hi,

I’ve used dgo v1 for following procedure (basically trying to upsert data) and it works fine. When I upgrade to v2 (for dgraph 1.1.0 server) it gives me “Transaction has already been committed or discarded” error. Anyone knows what cause it? Thank you!

ctx := context.Background()
txn := this._dgraphClient.NewTxn()
defer txn.Discard(ctx)
…
txn.QueryWithVars(…)
…
txn.QueryWithVars(…)
…
…
…
_, err := txn.Mutate(
ctx,
&api.Mutation{
SetNquads: byte(Nquads.String()),
},
)

if nil != err {
return err … Error was thrown here
}

2

Hi Steven,

Thank you for your question. I will have one of our engineers take a look at it and get back to you soon.

Shekar

3

Can you share a complete code example? It’s not clear why the error is happening. If this is the only client code that’s running, then either txn.Commit(ctx) or txn.Discard(ctx) were called by the client.