null value for oracle bolb columns in kafka messages for oracle debezium source connector, during  insert dmls on the oracle database

Bug report

null value for oracle bolb columns in kafka messages for oracle debezium source connector, during  insert dmls on the oracle database

What Debezium connector do you use and what version?

{   "class": "io.debezium.connector.oracle.OracleConnector",   "type": "source",   "version": "2.7.0.Final" }

What is the connector configuration?

curl -i -X POST -H "Accept:application/json" -H "Content-Type:application/json" \
  nn.nn.nn.nnn:8083/connectors/ \
  -d '{
  "name": "cdcdemocn",
  "config":

{     "connector.class": "io.debezium.connector.oracle.OracleConnector",     "tasks.max": "1",     "database.hostname": "dbhostname",     "database.port": "1521",     "database.user": "c##commonuser",     "database.password": "xxxxxxxxxxx",     "database.dbname": "cdbname",     "database.pdb.name": "pdbname",     "topic.prefix": "cdcdemotopic",     "topic.delimiter": "2",     "database.connection.adapter": "logminer",     "log.mining.strategy": "online_catalog",     "archive.destination.name": "LOG_ARCHIVE_DEST_1",     "log.enabled": true,     "schema.include.list": "schemaname",     "table.include.list": "schemaname.tab1,dbaname.tab2",     "message.key.columns": "schename.tab1:col1,col2;schemaname.tab2:col1,col2,col3",     "schema.history.internal.kafka.bootstrap.servers": "nn.nn.nn.nnn:9092",     "schema.history.internal.kafka.topic": "schema-changes",     "schema.history.internal.store.only.captured.tables.ddl": true,     "schema.history.internal.store.only.captured.databases.ddl": true,     "snapshot.mode":"no_data",     "topic.creation.default.partitions": 3,     "topic.creation.default.replication.factor": 3,     "topic.creation.default.compression.type": "lz4",     "datatype.propagate.source.type": "schemaname.tablname.blobcolumnname",     "key.converter": "org.apache.kafka.connect.json.JsonConverter",     "value.converter": "org.apache.kafka.connect.json.JsonConverter",     "debezium.source.lob.enabled": "true",     "binary.handling.mode": "bytes",     "key.converter.schemas.enable": "false",     "value.converter.schemas.enable": "false"   }

}'
exit

What is the captured database version and mode of deployment?

(E.g. on-premises, with a specific cloud provider, etc.)

on-premises oracle 19c

What behavior do you expect?

blob column data in bytes

What behavior do you see?

null value during inserts some byte data during updates

Do you see the same behaviour using the latest released Debezium version?

currently using latest version of  

{   "class": "io.debezium.connector.oracle.OracleConnector",   "type": "source",   "version": "2.7.0.Final" }

<Your answer>

Do you have the connector logs, ideally from start till finish?

(You might be asked later to provide DEBUG/TRACE level log)

<Your answer>

How to reproduce the issue using our tutorial deployment?

1. create a table with Blob column in oracle in pluggable database.

2. create the source connector with above configuration details

3. run insert statements with some blob data on the source oracle table.

4. check the resulting kafka messages for connector that was created in step2

the message payload contains null data for the blob columns

Feature request or enhancement

For feature requests or enhancements, provide this information, please:

Which use case/requirement will be addressed by the proposed feature?

<Your answer>

Implementation ideas (optional)

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