The TraversalOpProcessor has its own ObjectMapper static instance, which cannot be configured via the gremlin-server's YAML file. Within the YAML file, a user can configure serializers with custom IORegistries, to support serialization of custom types. However, the TraversalOpProcessor creates its own ObjectMapper, for bytecode deserialization, which does not read configuration information from from the YAML file.
This prevents deserialization of custom bytecode, such as references to a custom Predicate class.
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