Selenium Grid 运行报错 Exception thrown in Navigator.Start first time ->Error forwarding the new session Empty pool of VM for setup Capabilities

Selenium Grid 运行报错 ：

 Exception thrown in Navigator.Start first time ->Error forwarding the new session Empty pool of VM for setup Capabilities [{platform=WINDOWS, ensureCleanSession=true, ignoreProtectedModeSettings=true, ignoreZoomSetting=true, enablePersistentHover=false, ie.ensureCleanSession=true, requireWindowFocus=false, browserName=internet explorer, nativeEvents=false, version=10}]

找到原因：在node启动Selenium时的json文件配置不对，IE版本比较固定，在配置里要指定版本。在node.json中要有"version":"8",

{
"capabilities":
[
{
"browserName": "*firefox",
"maxInstances": 5,
"seleniumProtocol": "Selenium"
},
{
"browserName": "*googlechrome",
"maxInstances": 5,
"seleniumProtocol": "Selenium"
},
{
"browserName": "*iexplore",
"version":"8",
"maxInstances": 1,
"seleniumProtocol": "Selenium"
},
{
"browserName": "firefox",
"maxInstances": 5,
"seleniumProtocol": "WebDriver"
},
{
"browserName": "chrome",
"maxInstances": 5,
"seleniumProtocol": "WebDriver"
},
{
"browserName": "internet explorer",
"version":"8",
"maxInstances": 1,
"seleniumProtocol": "WebDriver"
}
],
"configuration":
{
"proxy": "org.openqa.grid.selenium.proxy.DefaultRemoteProxy",
"maxSession": 5,
"port": 5555,
"host": ip,
"register": true,
"registerCycle": 5000,
"hubPort": 4444,
"hubHost": ip
}
}