java.lang.VerifyError: Cannot inherit from final class when using spring boot data solr - spring-boot

Question

I have a rest web service that running with spring boot 1.4.2.RELEASE. I trying to use spring data solr with my project but I am getting a VerifyError.
Caused by: java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.8.0_40-ea]
at java.lang.ClassLoader.defineClass(ClassLoader.java:760) ~[na:1.8.0_40-ea]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[na:1.8.0_40-ea]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:455) ~[na:1.8.0_40-ea]
at java.net.URLClassLoader.access$100(URLClassLoader.java:73) ~[na:1.8.0_40-ea]
at java.net.URLClassLoader$1.run(URLClassLoader.java:367) ~[na:1.8.0_40-ea]
at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[na:1.8.0_40-ea]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_40-ea]
at java.net.URLClassLoader.findClass(URLClassLoader.java:360) ~[na:1.8.0_40-ea]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_40-ea]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) ~[na:1.8.0_40-ea]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_40-ea]
at org.apache.http.impl.client.DefaultHttpClient.createHttpParams(DefaultHttpClient.java:158) ~[httpclient-4.5.2.jar:4.5.2]
at org.apache.http.impl.client.AbstractHttpClient.getParams(AbstractHttpClient.java:467) ~[httpclient-4.5.2.jar:4.5.2]
at org.apache.solr.client.solrj.impl.HttpClientUtil.setFollowRedirects(HttpClientUtil.java:290) ~[solr-solrj-5.5.3.jar:5.5.3 8655b97b27d8da470c8235683af11a8b85a2b10f - anshum - 2016-09-01 13:05:41]
at org.apache.solr.client.solrj.impl.HttpClientConfigurer.configure(HttpClientConfigurer.java:58) ~[solr-solrj-5.5.3.jar:5.5.3 8655b97b27d8da470c8235683af11a8b85a2b10f - anshum - 2016-09-01 13:05:41]
at org.apache.solr.client.solrj.impl.HttpClientUtil.configureClient(HttpClientUtil.java:149) ~[solr-solrj-5.5.3.jar:5.5.3 8655b97b27d8da470c8235683af11a8b85a2b10f - anshum - 2016-09-01 13:05:41]
at org.apache.solr.client.solrj.impl.HttpClientUtil.createClient(HttpClientUtil.java:125) ~[solr-solrj-5.5.3.jar:5.5.3 8655b97b27d8da470c8235683af11a8b85a2b10f - anshum - 2016-09-01 13:05:41]
at org.apache.solr.client.solrj.impl.HttpSolrClient.<init>(HttpSolrClient.java:189) ~[solr-solrj-5.5.3.jar:5.5.3 8655b97b27d8da470c8235683af11a8b85a2b10f - anshum - 2016-09-01 13:05:41]
at org.apache.solr.client.solrj.impl.HttpSolrClient.<init>(HttpSolrClient.java:162) ~[solr-solrj-5.5.3.jar:5.5.3 8655b97b27d8da470c8235683af11a8b85a2b10f - anshum - 2016-09-01 13:05:41]
at com.itgis.kojaam.model.PersistenceContext.solrClient(PersistenceContext.java:157) ~[classes/:na]
at com.itgis.kojaam.model.PersistenceContext$$EnhancerBySpringCGLIB$$fa158d3c.CGLIB$solrClient$1(<generated>) ~[classes/:na]
at com.itgis.kojaam.model.PersistenceContext$$EnhancerBySpringCGLIB$$fa158d3c$$FastClassBySpringCGLIB$$fd7f382d.invoke(<generated>) ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE]
at com.itgis.kojaam.model.PersistenceContext$$EnhancerBySpringCGLIB$$fa158d3c.solrClient(<generated>) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_40-ea]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_40-ea]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_40-ea]
at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_40-ea]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE]
I think that this error related to library conflict of solrj with spring but i cant solve this , also i delete cache of maven (.m2 folder) and reimport dependency again but not work and my pom.xml file like below :
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.itgis</groupId>
<artifactId>myapp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>MyApp</name>
<description>My Application</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!--Spring Boot-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--Spring REST-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web-services</artifactId>
</dependency>
<!--Spring Security-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!--Spring JPA data-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!--Protocol buffer-->
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>com.googlecode.protobuf-java-format</groupId>
<artifactId>protobuf-java-format</artifactId>
<version>1.3</version>
</dependency>
<!--MySQL Connector-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!--Connection Pool library-->
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
</dependency>
<!-- Oval : Object validationUtil -->
<dependency>
<groupId>net.sf.oval</groupId>
<artifactId>oval</artifactId>
<version>1.86</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-solr</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
and this is my configuration for solr :
#Bean
public SolrClient solrClient() {
return new HttpSolrClient(environment.getRequiredProperty(PROPERTY_NAME_SOLR_SERVER_URL));
}
please help me to solve this error , thanks...

Answer 1

Struggled for 2 days with this:
Caused by: java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
I had 5 maven subprojects in my project structure.
Parent Project
- ProjectA --> pom.xml (some-lib 2.0.2) --> some-lib-2.0.2.jar -> *MyDep.class*
- ProjectB
- ProjectC --> pom.xml (other-name-lib 1.3.5) --> other-name-lib-1.3.5.jar -> *MyDep.class*
- ProjectD
- ProjectE
Turns out two sub-projects, imported the same class that was present in 2 different jars. Removed the slimmer jar dependency and it was fixed.
How did I find out? I decompiled all my dependencies (local jars in M2) looking for duplicates. Wish there was a better way.
My suggestion: This is most likely a duplicate in the classpath. Comb through your dependencies and look for duplicates. By duplicates, I don't mean just the jar names of the dependencies, but the contents and class files in those jars.