fix: data race

hrp/boomer.go

@@ -289,6 +289,9 @@ func (b *HRPBoomer) convertBoomerTask(testcase *TestCase, rendezvousList []*Rend
 	// reset start time only once
 	once := sync.Once{}
 
+	// update session variables mutex
+	mutex := sync.Mutex{}
+
 	return &boomer.Task{
 		Name:   testcase.Config.Name,
 		Weight: testcase.Config.Weight,
@@ -299,9 +302,11 @@ func (b *HRPBoomer) convertBoomerTask(testcase *TestCase, rendezvousList []*Rend
 			// init session runner
 			sessionRunner := caseRunner.newSession()
 
+			mutex.Lock()
 			if parametersIterator.HasNext() {
 				sessionRunner.updateSessionVariables(parametersIterator.Next())
 			}
+			mutex.Unlock()
 
 			startTime := time.Now()
 			for _, step := range testcase.TestSteps {

hrp/runner.go

@@ -281,7 +281,7 @@ func (r *HRPRunner) newCaseRunner(testcase *TestCase) (*testCaseRunner, error) {
 		timeout := time.Duration(runner.testCase.Config.Timeout*1000) * time.Millisecond
 		runner.hrpRunner.SetTimeout(timeout)
 	}
-	if plugin.Path() != "" {
+	if plugin != nil {
 		pluginContent, err := builtin.ReadFile(plugin.Path())
 		if err != nil {
 			return nil, err