serialization issue with kafka connect and redis sink - redis

Question

I have created a table in ksqlDb using key value specifically mentioned to be as 'Avro' like below.
create table (
region varchar(10) primary key,
male_count Integer,
female_count Integer
) with (kafka_topic='test',
key_format='avro',
value_format='avro',
partitions=1,
replicas=1)
Now I want the data from ksqldb to be sinked to redis using kafka connect. I am encountering the record convertion issue like below.
org.apache.kafka.connect.errors.ConnectException: failed to convert record
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:101)
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:90)
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:601)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:333)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:234)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:203)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:188)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:243)
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:750)
Caused by: org.apache.kafka.connect.errors.ConnectException: unsupported command schema io.confluent.ksql.avro_schemas.KsqlDataSourceSchema
at io.github.jaredpetersen.kafkaconnectredis.sink.writer.RecordConverter.convert(RecordConverter.java:57)
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:98)
... 12 more
{"type":"log", "host":"ckaf-kc-csf-kafka-connect-redis-55cb89b7bb-v2rtz", "level":"ERROR", "neid":"kafka-connect-455e22730a28462c969de25d9f54451e", "system":"kafka-connect", "time":"2022-10-18T10:16:57.224Z", "timezone":"UTC", "log":{"message":"task-thread-kafka-connect-redis-18-0 - org.apache.kafka.connect.runtime.WorkerSinkTask - WorkerSinkTask{id=kafka-connect-redis-18-0} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted. Error: failed to convert record"}}
org.apache.kafka.connect.errors.ConnectException: failed to convert record
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:101)
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:90)
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:601)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:333)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:234)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:203)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:188)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:243)
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:750)
Caused by: org.apache.kafka.connect.errors.ConnectException: unsupported command schema io.confluent.ksql.avro_schemas.KsqlDataSourceSchema
at io.github.jaredpetersen.kafkaconnectredis.sink.writer.RecordConverter.convert(RecordConverter.java:57)
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:98)
... 12 more
{"type":"log", "host":"ckaf-kc-csf-kafka-connect-redis-55cb89b7bb-v2rtz", "level":"ERROR", "neid":"kafka-connect-455e22730a28462c969de25d9f54451e", "system":"kafka-connect", "time":"2022-10-18T10:16:57.224Z", "timezone":"UTC", "log":{"message":"task-thread-kafka-connect-redis-18-0 - org.apache.kafka.connect.runtime.WorkerTask - WorkerSinkTask{id=kafka-connect-redis-18-0} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted"}}
org.apache.kafka.connect.errors.ConnectException: Exiting WorkerSinkTask due to unrecoverable exception.
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:631)
at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:333)
at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:234)
at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:203)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:188)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:243)
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:750)
Caused by: org.apache.kafka.connect.errors.ConnectException: failed to convert record
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:101)
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:90)
at org.apache.kafka.connect.runtime.WorkerSinkTask.deliverMessages(WorkerSinkTask.java:601)
... 10 more
Caused by: org.apache.kafka.connect.errors.ConnectException: unsupported command schema io.confluent.ksql.avro_schemas.KsqlDataSourceSchema
at io.github.jaredpetersen.kafkaconnectredis.sink.writer.RecordConverter.convert(RecordConverter.java:57)
at io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkTask.put(RedisSinkTask.java:98)
============================
Redis sink connector property is as shown below:
"name": "kafka-connect-redis-103",
"config": {
"connector.class": "io.github.jaredpetersen.kafkaconnectredis.sink.RedisSinkConnector",
"tasks.max": "1",
"key.converter": "io.confluent.connect.avro.AvroConverter",
"key.converter.schema.registry.url": "our service url",
"key.converter.enhanced.avro.schema.support": "true",
"value.converter": "io.confluent.connect.avro.AvroConverter",
"value.converter.schema.registry.url": "our service url",
"value.converter.enhanced.avro.schema.support": "true",
"topics": "test",
"redis.client.mode": "Cluster",
"redis.uri": "our service url",
"redis.operation.timeout.ms": 10000,
"redis.password": "ciredis",
"redis.database":3
}
what is wrong here? I have the Avro conversion property being specified. Still I am getting record conversion error.
Help here would be appreciated.