java.lang.NoClassDefFoundError: com/google/api/client/json/JsonFactory issue

Question

This is the gradle dependencies. (UPDATED)

   compile group: 'net.sf.ehcache', name: 'ehcache', version: '2.10.4'
compile 'org.springframework:spring-context-support:4.3.8.RELEASE'
compile('org.springframework.boot:spring-boot-starter-web')
compile('org.springframework.boot:spring-boot-starter-data-jpa')
compile group: 'mysql', name: 'mysql-connector-java', version: '5.1.6'

compile group: 'com.google.api-client', name: 'google-api-client', version: '1.20.0'

this code generates the error.

   HttpTransport transport = new NetHttpTransport();
        JacksonFactory jsonFactory =
                new JacksonFactory();
        GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(
                transport, jsonFactory)
                .setAudience(Collections.singletonList("1009293319809-dek5gcam0af2c52ute611c8p51cfvker.apps.googleusercontent.com"))
                // Or, if multiple clients access the backend:
                //.setAudience(Arrays.asList(CLIENT_ID_1, CLIENT_ID_2, CLIENT_ID_3))
                .build();

Received error

Caused by: java.lang.NoClassDefFoundError: com/google/api/client/json/JsonFactory
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.getDeclaredMethods(Class.java:1975)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:247)
... 63 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.google.api.client.json.JsonFactory
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735)
... 70 common frames omitted

Any idea of what library I am missing. I am assuming there is maybe conflict of libraries. how can I fix this?

Louis Bono · Accepted Answer · 2017-09-25 21:46:59Z

1

Your screenshot shows 2 versions of the google-api-client library:

Also, you are importing the library twice in your gradle build file:

compile group: 'com.google.api.client', name: 'google-api-client', version: '1.4.1-beta'
...
compile group: 'com.google.api-client', name: 'google-api-client', version: '1.20.0'

The fact that you get java.lang.NoClassDefFoundError seems to be caused by the fact that the older version of the library does not contain the mentioned class and it is overriding the most recent version of the library. All you need to do is remove the reference to the older version of the library (1.4.1-beta) from your gradle file.

answered Sep 25, 2017 at 21:46

Louis Bono

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13 Comments

Yohannes Gebremariam Over a year ago

I thought the class in question found in google-http-client-jackson

Louis Bono Over a year ago

@Yohannes The tags are a little misleading. The error message clearly states the class not being found: Caused by: java.lang.NoClassDefFoundError: com/google/api/client/json/JsonFactory

legend12345 Over a year ago

@LouisBono I removed the beta but still it doesnt work. I put jackson tag because I am suspecting that can be also conflicting.

Louis Bono Over a year ago

@legend12345 Are you getting the same error? Please post the details.

legend12345 Over a year ago

@LouisBono same as I wrote above. only now gradle has only 1.20.0 but still Caused by: java.lang.ClassNotFoundException: com.google.api.client.json.JsonFactory at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1892) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1735) ... 70 common frames omitted

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