尝试使用Jmeter 3.0执行一个脚本。我得到错误，例如，如果我应用了50个用户的负载，斜升周期10，循环计数：1

Thread Name: Thread Group 1-2

Sample Start: 1970-01-01 05:30:00 IST

Load time: 0

Connect Time: 0

Latency: 0

Size in bytes: 729

Headers size in bytes: 0

Body size in bytes: 729

Sample Count: 1

Error Count: 1

Data type ("text"|"bin"|""): text

Response code: Non HTTP response code: java.net.MalformedURLException

Response message: Non HTTP response message: no protocol:

Response headers:

HTTPSampleResult fields:

ContentType:

DataEncoding: null

有人能告诉我为什么会显示这种类型的错误吗？