NoClassDef Found Exception occured

Question

Exception in thread "main" java.lang.NoClassDefFoundError: okhttp3/ConnectionPool

at org.openqa.selenium.remote.internal.OkHttpClient$Factory.<init>(OkHttpClient.java:116)

at org.openqa.selenium.remote.http.HttpClient$Factory.createDefault(HttpClient.java:66)

at org.openqa.selenium.remote.HttpCommandExecutor.<clinit>(HttpCommandExecutor.java:47)

at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:181)

at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:168)

at org.openqa.selenium.chrome.ChromeDriver.<init>(ChromeDriver.java:123)

at Pack.FaceBookTest.main(FaceBookTest.java:13)

Caused by: java.lang.ClassNotFoundException: okhttp3.ConnectionPool

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

... 7 more

Answer 1

Here are a few probable steps to solve the NoClassDefFoundError - okhttp3/ConnectionPool error :

• While using a Build Tool e.g. Maven or Gradle, remove all the External JARs from the Java Build Path. Maven or Gradle will download and resolve all the required dependencies.
• If using Selenium JARs within a Java Project add only required External JARs within the Java Build Path and remove the unused one.
• While using Maven, either use <artifactId>selenium-java</artifactId> or <artifactId>selenium-server</artifactId>. Avoid using both at the same time.
• Upgrade JDK to recent levels JDK 8u162.
• Upgrade Selenium to current levels Version 3.10.0.
• Upgrade ChromeDriver ChromeDriver v2.37 level.
• Keep Chrome version at Chrome v64-66 levels. (as per ChromeDriver v2.37 release notes)
• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.
• Use CCleaner tool to wipe off all the OS chores before and after the execution of your Test Suite.

 Hope this helps!