BsonInvalidOperationException: readStartDocument can only be called when CurrentBSONType is DOCUMENT, not when CurrentBSONType is STRING - mongodb

Question

Data from source system -
abc#abc.com # kafka-avro-console-consumer --bootstrap-server
localhost:9092 --topic TTDF.TCDCPOC_DATA_TYPES --from-beginning
--property print.key=true --property print.value=true --property key.deserializer=org.apache.kafka.common.serialization.StringDeserializer
"57508564" {"data":{"SEQNO":{"int":57508564},"TEXT":{"string":"Lorem ipsum dolor sit amet,"},"BIGNUM":{"long":11122233344447},"BINOBJ":{"bytes":"#~¦`¬| DATA IS STORED AS BINARY|>"},"CHAROBJ":{"string":"<text>THIS DATA IS STORED AS CLOB</text>"},"FLOATNUM":{"double":6.62607015E-34},"CHARVAR":{"string":"consectetur adipiscing elit,sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."}},"headers":{"operation":"REFRESH","changeSequence":"","timestamp":"","streamPosition":"","transactionId":"","changeMask":null,"columnMask":null}}
^CProcessed a total of 6 messages
Schema registry -
{
"subject": "TTDF.TCDCPOC_DATA_TYPES-value",
"version": 3,
"id": 12,
"schema": "{"type":"record","name":"DataRecord","fields":[{"name":"data","type":{"type":"record","name":"Data","fields":[{"name":"SEQNO","type":["null","int"],"default":null},{"name":"TEXT","type":["null","string"],"default":null},{"name":"BIGNUM","type":["null","long"],"default":null},{"name":"BINOBJ","type":["null","bytes"],"default":null},{"name":"CHAROBJ","type":["null","string"],"default":null},{"name":"FLOATNUM","type":["null","double"],"default":null},{"name":"CHARVAR","type":["null","string"],"default":null}]}},{"name":"headers","type":{"type":"record","name":"Headers","fields":[{"name":"operation","type":{"type":"enum","name":"operation","symbols":["INSERT","UPDATE","DELETE","REFRESH"]}},{"name":"changeSequence","type":"string"},{"name":"timestamp","type":"string"},{"name":"streamPosition","type":"string"},{"name":"transactionId","type":"string"},{"name":"changeMask","type":["null","bytes"]},{"name":"columnMask","type":["null","bytes"]}]}}]}"
}
Errors -
[2019-02-12 12:28:48,364] ERROR WorkerSinkTask{id=mongo-0} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted. (org.apache
.kafka.connect.runtime.WorkerSinkTask:584)
org.bson.BsonInvalidOperationException: readStartDocument can only be called when CurrentBSONType is DOCUMENT, not when CurrentBSONType is STRING.
at org.bson.AbstractBsonReader.verifyBSONType(AbstractBsonReader.java:690)
at org.bson.AbstractBsonReader.checkPreconditions(AbstractBsonReader.java:722)
at org.bson.AbstractBsonReader.readStartDocument(AbstractBsonReader.java:450)
at org.bson.codecs.BsonDocumentCodec.decode(BsonDocumentCodec.java:81)
at org.bson.BsonDocument.parse(BsonDocument.java:62)
at at.grahsl.kafka.connect.mongodb.converter.JsonRawStringRecordConverter.convert(JsonRawStringRecordConverter.java:32)
at at.grahsl.kafka.connect.mongodb.converter.SinkConverter.convert(SinkConverter.java:44)
at at.grahsl.kafka.connect.mongodb.MongoDbSinkTask.lambda$buildWriteModel$3(MongoDbSinkTask.java:186)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at at.grahsl.kafka.connect.mongodb.MongoDbSinkTask.buildWriteModel(MongoDbSinkTask.java:185)
at at.grahsl.kafka.connect.mongodb.MongoDbSinkTask.processSinkRecords(MongoDbSinkTask.java:122)
at at.grahsl.kafka.connect.mongodb.MongoDbSinkTask.lambda$null$0(MongoDbSinkTask.java:111)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at at.grahsl.kafka.connect.mongodb.MongoDbSinkTask.lambda$put$1(MongoDbSinkTask.java:110)
at java.util.HashMap.forEach(HashMap.java:1289)
at at.grahsl.kafka.connect.mongodb.MongoDbSinkTask.put(MongoDbSinkTask.java:109)
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:564)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:322)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:225)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:193)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:175)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:219)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
[2019-02-12 12:28:48,364] ERROR WorkerSinkTask{id=mongo-0} Task threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:177)
org.apache.kafka.connect.errors.ConnectException: Exiting WorkerSinkTask due to unrecoverable exception.
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:586)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:322)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:225)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:193)
Config file -
{
"name": "mongo",
"config": {
"key.converter":"org.apache.kafka.connect.storage.StringConverter",
"internal.key.converter":"org.apache.kafka.connect.storage.StringConverter",
"internal.key.converter.schemas.enable":"false",
"key.converter.schemas.enable": false,
"key.ignore":"true",
"value.converter":"io.confluent.connect.avro.AvroConverter",
"internal.value.converter":"io.confluent.connect.avro.AvroConverter",
"value.converter.schemas.enable": true,
"internal.value.converter.schemas.enable":"true",
"key.converter.schema.registry.url":"http://localhost:8081",
"value.converter.schema.registry.url":"http://localhost:8081",
"connector.class": "at.grahsl.kafka.connect.mongodb.MongoDbSinkConnector",
"topics":"TTDF.TCDCPOC_DATA_TYPES",
"mongodb.connection.uri":"mongodb://xxxx:Password1#xxxx:27017/testdb?authSource=xxx",
"mongodb.collection":"TCDCPOC_DATA_TYPES",
"_comment":"transforms\":\"createKey",
"_comment":"transforms.createKey.type:org.apache.kafka.connect.transforms.Flatten$Value",
"_comment":"transforms.Flatten.delimiter:_",
"_comment":"transforms.createKey.type:io.confluent.connect.transforms.Drop$Key",
"_comment":"transforms.createKey.skip.missing.or.null\":\"true",
"_comment":"transforms.createKey.type\":\"org.apache.kafka.connect.transforms.ValueToKey",
"_comment":"transforms.createKey.fields\":\"data.SEQNO",
"_comment":"transforms.createKey.static.key:test"
}
}