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The number of object passed must be even but was [1]
java.lang.IllegalArgumentException: The number of object passed must be even but was [1] at org.elasticsearch.action.index.IndexRequest.source( at org.elasticsearch.action.index.IndexRequestBuilder.setSource( at org.apache.kafka.connect.elasticsearchschema.ElasticsearchSinkTask.put( at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages( at org.apache.kafka.connect.runtime.WorkerSinkTask.poll( at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration( at org.apache.kafka.connect.runtime.WorkerSinkTask.execute( at org.apache.kafka.connect.runtime.WorkerTask.doRun(