added additional logging for failed serializtion

I was not able to compile this code since there is something off with my maven build. Can't find the tagged snaphshot. I have the tagged artifact repo in my .m2 settings so not sure if I am missing something else
ERROR] Failed to execute goal on project camus-etl-kafka: Could not resolve dependencies for project com.linkedin.camus:camus-etl-kafka:jar:0.1.0-TAGGED-SNAPSHOT: