Just in case someone stumbles upon the same problem : I had conflicting jackson libairies in /opt/lucidworks-hdpsearch/hbase-indexer/lib jackson-core-asl-1.9.13.jar jackson-mapper-asl-1.9.13.jar jackson-jaxrs-1.9.13.jar jackson-xc-1.9.13.jar jackson-annotations-2.3.0.jar jackson-core-2.3.1.jar j jackson-databind-2.3.1.jar Removing the 1.* versions solved everything.
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