fix: add timeout for SPDY executor stream

Signed-off-by: Yuping Fan <coderfyp@gmail.com>

workflow/signal/signal.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"github.com/argoproj/argo-workflows/v3/util/env"
 	"path/filepath"
 	"strings"
 	"syscall"
+	"time"
 
 	log "github.com/sirupsen/logrus"
 	corev1 "k8s.io/api/core/v1"
@@ -15,6 +17,8 @@ import (
 	"github.com/argoproj/argo-workflows/v3/workflow/common"
 )
 
+var spdyTimeout = env.LookupEnvDurationOr("SPDY_TIMEOUT", 10*time.Minute)
+
 func SignalContainer(ctx context.Context, restConfig *rest.Config, pod *corev1.Pod, container string, s syscall.Signal) error {
 	command := []string{"/bin/sh", "-c", "kill -%d 1"}
 
@@ -49,6 +53,8 @@ func ExecPodContainerAndGetOutput(ctx context.Context, restConfig *rest.Config,
 	if err != nil {
 		return err
 	}
+	ctx, cancel := context.WithTimeout(ctx, spdyTimeout)
+	defer cancel()
 	stdout, stderr, err := common.GetExecutorOutput(ctx, x)
 	log.
 		WithField("namespace", namespace).