Fix Tx pipeline hook

Author: vmihailenco

cluster.go

@@ -1256,10 +1256,13 @@ func (c *ClusterClient) TxPipelined(ctx context.Context, fn func(Pipeliner) erro
 }
 
 func (c *ClusterClient) processTxPipeline(ctx context.Context, cmds []Cmder) error {
-	return c.hooks.processPipeline(ctx, cmds, c._processTxPipeline)
+	return c.hooks.processTxPipeline(ctx, cmds, c._processTxPipeline)
 }
 
 func (c *ClusterClient) _processTxPipeline(ctx context.Context, cmds []Cmder) error {
+	// Trim multi .. exec.
+	cmds = cmds[1 : len(cmds)-1]
+
 	state, err := c.state.Get(ctx)
 	if err != nil {
 		setCmdsErr(cmds, err)
@@ -1295,6 +1298,7 @@ func (c *ClusterClient) _processTxPipeline(ctx context.Context, cmds []Cmder) er
 					if err == nil {
 						return
 					}
+
 					if attempt < c.opt.MaxRedirects {
 						if err := c.mapCmdsByNode(ctx, failedCmds, cmds); err != nil {
 							setCmdsErr(cmds, err)

cluster_test.go

@@ -820,14 +820,14 @@ var _ = Describe("ClusterClient", func() {
 
 			client.AddHook(&hook{
 				beforeProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
-					Expect(cmds).To(HaveLen(1))
-					Expect(cmds[0].String()).To(Equal("ping: "))
+					Expect(cmds).To(HaveLen(3))
+					Expect(cmds[1].String()).To(Equal("ping: "))
 					stack = append(stack, "cluster.BeforeProcessPipeline")
 					return ctx, nil
 				},
 				afterProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) error {
-					Expect(cmds).To(HaveLen(1))
-					Expect(cmds[0].String()).To(Equal("ping: PONG"))
+					Expect(cmds).To(HaveLen(3))
+					Expect(cmds[1].String()).To(Equal("ping: PONG"))
 					stack = append(stack, "cluster.AfterProcessPipeline")
 					return nil
 				},

internal/pool/pool.go

@@ -477,6 +477,7 @@ func (p *ConnPool) ReapStaleConns() (int, error) {
 		p.connsMu.Lock()
 		cn := p.reapStaleConn()
 		p.connsMu.Unlock()
+
 		p.freeTurn()
 
 		if cn != nil {