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Try indicating constructor to use @JsonCreator annotation.

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The easiest solution is to provide a default constructor for the class you want to convert from/to json.

Solutions on the web

via GitHub by drcrallen
, 1 year ago
Could not resolve type id 'kafka' into a subtype of [simple type, class io.druid.query.lookup.LookupExtractorFactory] at [Source: {"type":"kafka","kafkaTopic":"testTopic","kafkaProperties":{"request.required.acks":"1","zookeeper.connect":"127.0.0.1:
via Google Groups by Ben Vogan, 6 months ago
Could not resolve type id 'index_kafka' into a subtype of [simple type, class io.druid.indexing.common.task.Task] at [Source: [B@5035ce8a; line: 1, column: 2]
via Google Groups by Gian Merlino, 6 months ago
Could not resolve type id 'index_kafka' into a subtype of [simple type, class io.druid.indexing.common.task.Task] at [Source: [B@6e841513; line: 1, column: 2]
via GitHub by jbubier
, 1 year ago
Could not resolve type id 'int' into a subtype of [simple type, class org.apache.drill.synth.FieldSampler] at [Source: schema; line: 3, column: 23]
via GitHub by cemo
, 2 years ago
Unexpected token (END_OBJECT), expected FIELD_NAME: missing property '@class' that is to contain type id (for class com.fasterxml.jackson.databind.JsonNode) at [Source: java.io.StringReader@b240236; line: 1, column: 193]
via GitHub by amrapalijz
, 2 years ago
No content to map due to end-of-input at [Source: java.io.StringReader@30c7da1e; line: 1, column: 1]

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