About selenium common. exceptions. Webdriverexception: message: an unknown server side error solution (resolved)

Wanyeji
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If you click in, you must first carefully check whether your error reporting details are consistent with those of the blogger , The “WebDriverException” Many exception types , Please carefully check whether the error information in this article is consistent with yours .

Example script with errors

# coding=utf-8


from time import sleep
from appium import webdriver    # appium  The feature of Android is that Android 、IOS The bottom layer of is encapsulated into  webdriver  Type statements 
# from appium.webdriver.common import appiumby

'''  The difference in WEB automation ,APP Automation requires a concept of equipment ;  The so-called equipment concept , Is the start parameter  '''

#  Launch parameters 
desired_caps = {
    }       #  Definition  desired_caps  Variable , Used to assign a lot of startup information 
desired_caps['platformName'] = 'Android'    #  Equipment name 、 System is  "Android"
desired_caps['platformVersion'] = '4.4.2'   #  Here is the setup center of the night God simulator to view the Android version  "7.1.2" , Later, I will tell you how to switch versions 
desired_caps['deviceName'] = '127.0.0.1：:62001'     #  If it is a real machine, fill in the equipment name ; Because we use simulators , Fill in IP Port number 
desired_caps['appPackage'] = 'com.android.contacts'     # APP  The package name ; Here we use the address book 
desired_caps['appActivity'] = '.activities.PeopleActivity'    #  The name of the launched interface （ Or the startup name , The default is  "."  At the beginning ）
desired_caps['automationName']='UiAutomator1'

#  Declare the mobile driver 
driver = webdriver.Remote('http://localhost:4723/wd/hub', desired_caps)  #  Register to this node , Pass in  "desired_caps". This node is  "appium"  Open port node 

#  Navigate to the contact you want to work on 
driver.find_element_by_id('com.android.contacts:id/cliv_name_textview').click()     #  Here is the demonstration effect , First write . Later, I will tell you how to locate this id
sleep(3)
driver.quit()

Preface

Doing it APPIUM Of APP The following two error messages appear during the automated case demonstration :

selenium.common.exceptions.WebDriverException: Message: An unknown server-side error occurred while processing the command. Original error: Unable to find an active device or emulator with OS 4.4.2. The following are available: 127.0.0.1:62001 (7.1.2)

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appium The contents of the error report are as follows ：

Encountered internal error running command: Error: Unable to find an active device or emulator with OS 4.4.2. The following are available: 127.0.0.1:62001 (7.1.2)

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Abnormal analysis

In fact, there is nothing to analyze , The prompt message has already told you . It is the default device information we have passed in “ Android version ” Not caused by , We introduced The Android version is 4.4.2 , But in fact “ Night God Simulator ” The current default version of is “7.1.2”.

PS： I wrote this script before , At that time “ Night God Simulator ” The default version of is “4.4.2”, The error message tells us that the current Android version of the device is “7.1.2”

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