Original error: pageElementJSON.filter is not a function

The problem

appium server was on the mac device.java client was running at linux platform. “. Original error: pageElementJSON.filter is not a function” exception was thrown when i tried to call driver.getContextHandles().

Environment

• Appium version (or git revision) that exhibits the issue:1.8.1
• Desktop OS/version used to run Appium:mac os 10.13.5
• Node.js version (unless using Appium.app|exe):8.11.2
• Mobile platform/version under test:ios10.3.3
• Real device or emulator/simulator:real device
• IWDP version:1.8

Link to Appium logs

[debug] [RemoteDebugger] Page element JSON: {"value":"Unhandled endpoint: /json -- http://localhost:27753/ with parameters {\n    wildcards =     (\n        json\n    );\n}","sessionId":"08F5379D-37AF-4882-A26A-D2619959B6EC","status":1}
[W3C] Encountered internal error running command: TypeError: pageElementJSON.filter is not a function
[W3C]     at WebKitRemoteDebugger.pageArrayFromJson$ (/usr/local/lib/node_modules/appium/node_modules/appium-remote-debugger/lib/webkit-remote-debugger.js:61:40)
[W3C]     at tryCatch (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)
[W3C]     at GeneratorFunctionPrototype.invoke [as _invoke] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:315:22)
[W3C]     at GeneratorFunctionPrototype.prototype.(anonymous function) [as next] (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:100:21)
[W3C]     at GeneratorFunctionPrototype.invoke (/usr/local/lib/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:136:37)
[W3C]     at <anonymous>
[HTTP] <-- GET /wd/hub/session/f017a4f7-18c2-4fe4-97c4-650d456e5395/contexts 500 14 ms - 1164
[HTTP] 
[HTTP] --> DELETE /wd/hub/session/f017a4f7-18c2-4fe4-97c4-650d456e5395
[HTTP] {}

Code To Reproduce Issue [ Good To Have ]

capabilities.setCapability(IOSMobileCapabilityType.START_IWDP, true);
  capabilities.setCapability("webkitDebugProxyPort", 27753);
            driver = new IOSDriver<>(new URL("http://192.168.31.191:4723/wd/hub"), capabilities);
           System.out.println(driver.getContextHandles());

stack trace

org.openqa.selenium.WebDriverException: An unknown server-side error occurred while processing the command. Original error: pageElementJSON.filter is not a function
Build info: version: '3.12.0', revision: '7c6e0b3', time: '2018-05-08T14:04:26.12Z'
System info: host: 'caihua-PC', ip: '127.0.1.1', os.name: 'Linux', os.arch: 'amd64', os.version: '4.15.0-21deepin-generic', java.version: '1.8.0_172'
Driver info: io.appium.java_client.ios.IOSDriver
Capabilities {app: /Users/caihua/Desktop/xjq3...., automationName: XCuiTest, browserName: , commandTimeouts: {default: 16000, findElement: 8000, findElements: 15000, setValue: 8000}, databaseEnabled: false, deviceName: ipad, fullReset: false, javascriptEnabled: true, locationContextEnabled: false, networkConnectionEnabled: false, newCommandTimeout: 600, noReset: true, platform: MAC, platformName: iOS, platformVersion: 11.3.1, showXcodeLog: false, startIWDP: true, takesScreenshot: true, udid: 0c518faa3c350226439b1a7f929..., updatedWDABundleId: com.minglin.appium.ios, wdaConnectionTimeout: 60000, wdaLaunchTimeout: 60000, wdaLocalPort: 27753, wdaStartupRetries: 3, wdaStartupRetryInterval: 6000, webStorageEnabled: false, xcodeOrgId: S4LAW85QU6, xcodeSigningId: iPhone Developer}
Session ID: f017a4f7-18c2-4fe4-97c4-650d456e5395
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.openqa.selenium.remote.http.W3CHttpResponseCodec.createException(W3CHttpResponseCodec.java:187)
	at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:122)
	at org.openqa.selenium.remote.http.W3CHttpResponseCodec.decode(W3CHttpResponseCodec.java:49)
	at org.openqa.selenium.remote.HttpCommandExecutor.execute(HttpCommandExecutor.java:158)
	at io.appium.java_client.remote.AppiumCommandExecutor.execute(AppiumCommandExecutor.java:231)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:543)
	at io.appium.java_client.DefaultGenericMobileDriver.execute(DefaultGenericMobileDriver.java:46)
	at io.appium.java_client.AppiumDriver.execute(AppiumDriver.java:1)
	at io.appium.java_client.ios.IOSDriver.execute(IOSDriver.java:1)
	at io.appium.java_client.AppiumDriver.getContextHandles(AppiumDriver.java:206)
	at ios_appium.App.main(App.java:66)

[JohnHuahuaZhan]

@mykola-mokhnach thank you so much.i used another port and it worked

[lock[bot]]

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