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https://issues.apache.org/jira/browse/TINKERPOP-1582?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15728559#comment-15728559
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Robert Dale commented on TINKERPOP-1582:
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Not that this solves your problem, but 'g' is the gremlin namespace. Ideally,
you would use your own namespace, e.g.
{noformat}
snl:MyP
{noformat}
> TraversalOpProcessor does not support custom serializers
> --------------------------------------------------------
>
> Key: TINKERPOP-1582
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1582
> Project: TinkerPop
> Issue Type: Improvement
> Components: server
> Affects Versions: 3.2.3
> Reporter: Branden Moore
>
> 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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