// UpdateTabletFields implements topo.Server.
func (s *Server) UpdateTabletFields(ctx context.Context, tabletAlias topo.TabletAlias, updateFunc func(*topo.Tablet) error) error {
var ti *topo.TabletInfo
var err error
for {
if ti, err = s.GetTablet(ctx, tabletAlias); err != nil {
return err
}
if err = updateFunc(ti.Tablet); err != nil {
return err
}
if _, err = s.UpdateTablet(ctx, ti, ti.Version()); err != topo.ErrBadVersion {
break
}
}
if err != nil {
return err
}
event.Dispatch(&events.TabletChange{
Tablet: *ti.Tablet,
Status: "updated",
})
return nil
}
// agentRPCTestIsTimeoutErrorDialTimeout verifies that client.IsTimeoutError()
// returns true for RPCs failed due to a connect timeout during .Dial().
func agentRPCTestIsTimeoutErrorDialTimeout(ctx context.Context, t *testing.T, client tmclient.TabletManagerClient, ti *topo.TabletInfo) {
// Connect to a non-existing tablet.
// For example, this provokes gRPC to return error grpc.ErrClientConnTimeout.
invalidTi := topo.NewTabletInfo(ti.Tablet, ti.Version())
invalidTi.Tablet = proto.Clone(invalidTi.Tablet).(*topodatapb.Tablet)
invalidTi.Tablet.Hostname = "Non-Existent.Server"
shortCtx, cancel := context.WithTimeout(ctx, time.Millisecond)
defer cancel()
err := client.Ping(shortCtx, invalidTi)
if err == nil {
t.Fatal("agentRPCTestIsTimeoutErrorDialTimeout: connect to non-existant tablet did not fail")
}
if !client.IsTimeoutError(err) {
t.Errorf("agentRPCTestIsTimeoutErrorDialTimeout: want: IsTimeoutError() = true. error: %v", err)
}
}
