One of the most annoying errors you can get while running a Java program is the “java.lang.IllegalStateException: Failed to introspect Class” error. If you have received a response like this from the Java compiler, it means that there is a problem with the current build path of your project.
There is an error in the classpath, which is preventing the compiler from correctly parsing the project. This blog will give you some tips on how to get rid of this error. Read on.
How To Deal With The Error “java.lang.IllegalStateException: Failed to introspect Class”?
Simply adding spring-data-elasticsearch to the classpath will resolve the “java.lang.IllegalStateException: Failed to introspect Class” problem. Your issue should now be fixed. The second approach is simply adding the spring-data-elasticsearch.jar file to the classpath, which will resolve your problem.
Option 1: Include spring-data-elasticsearch.
Simply include spring-data-elasticsearch to the classpath. Exactly like this.
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-elasticsearch</artifactId>
<version>3.2.5.RELEASE</version>
</dependency>
Your issue must now be fixed.
Option 2
Simply include the spring-data-elasticsearch.jar file in the classpath to resolve the issue.
Conclusion
We hope you enjoyed our article about dealing with “java.lang.IllegalStateException: Failed to introspect Class” error. We are confident that you will be able to make the most of your Java development experience with this information.
If you still have any further concerns or problems, please feel free to leave us a comment. Thank you for reading; please make sure to share this helpful article with others!