worryg0d commented on code in PR #1793:
URL:
https://github.com/apache/cassandra-gocql-driver/pull/1793#discussion_r1935784267
##########
query_executor.go:
##########
@@ -83,7 +84,27 @@ func (q *queryExecutor) speculate(ctx context.Context, qry
ExecutableQuery, sp S
}
func (q *queryExecutor) executeQuery(qry ExecutableQuery) (*Iter, error) {
- hostIter := q.policy.Pick(qry)
+ var hostIter NextHost
+
+ // check if the host id is specified for the query,
+ // if it is, the query should be executed at the corresponding host.
+ if hostID := qry.GetHostID(); hostID != "" {
+ pool, ok := q.pool.getPoolByHostID(hostID)
+ if !ok || !pool.host.IsUp() {
+ return &Iter{err: ErrNoConnections}, nil
+ }
+ hostIter = func() SelectedHost {
+ // forcing hostIter to always return the same host
+ // it makes any retries and speculative executions run
on the specified host
Review Comment:
> Having potentially endless executions on the same host doesn't look right
to me
Yea I don't like this one too. It makes sense to prevent speculative
executions when we use this API, but disabling retry policies... Probably it
makes sense once we use it we assume that the host is reachable.
However, providing context via `WithContext()` will prevent endless
executions.
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