Issue with Jackson ObjectMapper after version upgrade

[leeasling1]

Good morning all,

We are upgrading our current project's AEM SDK version (AEMaaCS) from 2023.7.12697.20230713T151945Z-230601 to 2023.11.14227.20231108T162349Z-231100, however, when we do so, we are getting build errors when running unit tests against code that uses the Jackson ObjectMapper.  These errors are not present and the tests pass in the current project.  It is only when we upgrade the SDK version that we receive these errors.

This seems like a breaking change, but I don't see anything documented from Adobe on this.  Has anyone experienced this issue?  Any suggestions on a resolution?

The errors are below.  I have adjusted the namespace and class names purposefully.

java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/util/internal/PrivateMaxEntriesMap$Builder
at com.project.project.core.models.ClassNameTest.setResponseFromJson(ClassNameTest.java:591)
at com.project.project.core.models.ClassNameTest.setUp(ClassNameTest.java:87)
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.util.internal.PrivateMaxEntriesMap$Builder
at com.project.project.core.models.ClassNameTest.setResponseFromJson(ClassNameTest.java:591)
at com.project.project.core.models.ClassNameTest.setUp(ClassNameTest.java:87)

[ERROR] getCardPaths_setTag Time elapsed: 0.032 s <<< ERROR!
java.lang.NoClassDefFoundError: Could not initialize class com.fasterxml.jackson.databind.ObjectMapper
at com.project.project.core.models.ClassNameTest.setResponseFromJson(ClassNameTest.java:591)
at com.project.project.core.models.ClassNameTest.setUp(ClassNameTest.java:87)

[EstebanBustamante]

As for the resolution try to include the Jackson dependency in your POM with TEST scope, like below:

      <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-core</artifactId>
          <version>[2.12.3,)</version>
          <scope>test</scope>
      </dependency>

Feel free to adjust the version you are using. In regards to the issue as a whole, there maybe some version change, that's my guess, but the above should solve it. 

Hope this helps

[leeasling1]

Hi Esteban - I did try this before posting, and now for a second time with your response, and it does not work, I still receive the same errors, which is very strange.

[leeasling1 · Accepted solution]

Followup - I did this again, but changed "jackson-core" to "jackson-databind", and it works perfectly.

Thank you @EstebanBustamante 

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>[2.12.3,)</version>
    <scope>test</scope>
</dependency>

[EstebanBustamante]

I'm glad it worked, it results that jacskon-databind builds on top of jackson-core, so it make sense:

Here for reference.

• Jackson Core contains streaming parser, generator.
  
• Jackson Annotations for annotation-based configuration (used by data-bind).
  
• Jackson databind for data binding, tree model (builds on streaming core).

[kautuk_sahni]

@leeasling1 I hope you found the AEM community helpful. We look forward to your return as either a learner or a contributor. The community thrives with SMEs like you. Please encourage your AEM peers to join and contribute. Happy AEM learning!

[22838leo]

Thanks for the suggested fix! I bumped into the exact same NoClassDefFoundError issue while upgrading from Service Pack 19 to SP21, Jackson versions 2.13.5 and 2.16.2, respectively.  Adding the dependency worked like a charm.

[kautuk_sahni]

@leeasling1 Did you find the suggestions from users helpful? Please let us know if more information is required. Otherwise, please mark the answer as correct for posterity. If you have found out solution yourself, please share it with the community.