错误：命令“java -version”以代码 20 退出

Posted 2023-04-19

【中文标题】错误：命令“java -version”以代码 20 退出

【英文标题】：Error: Command 'java -version' exited with code 20

【发布时间】：2018-08-06 19:08:48

【问题描述】：

我从它抛出的 Eclipse 运行 android 自动化测试

运行命令时遇到内部错误：错误：命令 'java -version' exited with code 20

Appium Logfile: 

`[BaseDriver] Event 'newSessionRequested' logged at 1519716463353
(12:57:43 GMT+0530 (IST)) [Appium] Merged W3C capabilities
"desiredCapabilities":"app":"/Users/sathish/S... into
desiredCapabilities object
"app":"/Users/sathish/Sathish/CASA/Automation ... [Appium] Creating
new AndroidDriver (v1.39.0) session [Appium] Capabilities: [Appium] 
app: /Users/sathish/Sathish/CASA/Automation
Test/EndlessAisleAutomationTest/app/app-qa-debug.apk [Appium]  
appActivity: tech.ajira.endlessAisle.activities.TenantLoginActivity
[Appium]   appPackage: tech.ajira.endlessAisle [Appium]  
deviceName: Google Nexus 9 [Appium]   platformName: android
[BaseDriver]  [BaseDriver] W3C capabilities [] and MJSONWP desired
capabilities  were provided [BaseDriver] Expected W3C "capabilities"
to be a JSON Object but was provided with: [] [BaseDriver] Falling
back to MJSONWP desired capabilities [BaseDriver] Session created
with session id: e1e27d58-611a-4877-b8fc-8e7e98351be1
[AndroidDriver] Getting Java version [AndroidDriver] Shutting down
Android driver [AndroidDriver] Called deleteSession but bootstrap
wasn't active [MJSONWP] Encountered internal error running command:
Error: Command 'java -version' exited with code 20
    at ChildProcess. (/Applications/Appium.app/Contents/Resources/app/node_modules/teen_process/lib/teen_process.js:97:19)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:194:7)
    at maybeClose (internal/child_process.js:899:16)
    at Socket. (internal/child_process.js:342:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:191:7)
    at Pipe._handle.close [as _onclose] (net.js:510:12) [HTTP] <-- POST /wd/hub/session 500 41 ms - 180`
     Please help me to fix this issue. Thank you

【参考方案1】：

似乎 Appium 无法连接到正在运行的模拟器。尝试为deviceName 和platformVersion 功能设置正确的值以查找连接的设备。

在命令提示符下尝试运行adb devices 以获取设备名称。

【讨论】：

我检查了deviceName 和platformVersion。它具有正确的值。我使用 WebDriver 运行相同的代码，它正在工作，对于 AndroidDriver 它显示在错误上方

您能否发布您从adb devices 获得的deviceName。

感谢您的回复。我修好了。问题是我设置了错误的 JAVA_HOME 环境变量