I'm testing the use of MSK Connect with IcebergSinkConnector, but I'm having some difficulty making it work.

Question

I'm testing the use of MSK Connect with IcebergSinkConnector, but I'm having some difficulty making it work. If anyone has experience with MSK and can help me, that would be great.

I have a topic in MSK being fed by an MSK Connect with Debezium, performing CDC from a RDS PostgreSQL. In this connect, I use the Glue Schema Registry to register the schemas. Subsequently, I am attempting to sink one of these topics into an Iceberg table, using Glue as the catalog.

My Iceberg sink configuration is as follows, and the connector is running in MSK, but nothing is created or saved in my table. In the CloudWatch logs, I see the error `org.apache.kafka.common.errors.TimeoutException: Timeout expired after 60000 milliseconds while awaiting InitProducerId`.

Can someone help me understand where the error might be?

`connector.class=io.tabular.iceberg.connect.IcebergSinkConnector
tasks.max=1
topics=dbz.account
errors.deadletterqueue.context.headers.enable=false
consumer.auto.offset.reset=latest
s3.region=us-east-1
errors.log.enable=true
# Iceberg Configs
iceberg.catalog.catalog-impl=org.apache.iceberg.aws.glue.GlueCatalog
iceberg.catalog.io-impl=org.apache.iceberg.aws.s3.S3FileIO
iceberg.catalog.warehouse=s3://***********/iceberg_tables
iceberg.catalog.client.region=us-east-1
iceberg.control.topic=iceberg-connector-control-v1
iceberg.tables.dynamic-enabled=false
iceberg.tables.upsert-mode-enabled=true
iceberg.tables.evolve-schema-enabled=true
iceberg.tables.auto-create-enabled=true
iceberg.tables=db.account
iceberg.tables.cdc-field=__op
iceberg.tables.default-id-columns=account_id
iceberg.control.commit.interval-ms=60000
# Glue Schema Registry Specific
key.converter=org.apache.kafka.connect.storage.StringConverter
key.converter.schemas.enable=false
key.converter.endpoint=https://glue.us-east-1.amazonaws.com
value.converter=com.amazonaws.services.schemaregistry.kafkaconnect.AWSKafkaAvroConverter
value.converter.schemaAutoRegistrationEnabled=true
value.converter.region=us-east-1
value.converter.avroRecordType=GENERIC_RECORD
value.converter.compatibility=NONE
value.converter.registry.name=testregistry
value.converter.endpoint=https://glue.us-east-1.amazonaws.com`

Answer

Add the following to your connector configuration:

```
transactions.timeout.ms=90000 
retries=5
max.block.ms=90000
```

Start with slightly higher values to give the connector more leeway, then adjust accordingly once it's functional.

Review the MSK cluster's logs and metrics around the time the errors occur. Look for any broker restarts, configuration changes, scaling events, or unusual network patterns that could contribute to temporary slowdowns.

Answer

Sorry, my configuration was messed up, I'll send it here in a better way:

```
connector.class=io.tabular.iceberg.connect.IcebergSinkConnector
tasks.max=1
topics=dbz.account
errors.deadletterqueue.context.headers.enable=false
consumer.auto.offset.reset=latest
s3.region=us-east-1
errors.log.enable=true
# Iceberg Configs
iceberg.catalog.catalog-impl=org.apache.iceberg.aws.glue.GlueCatalog
iceberg.catalog.io-impl=org.apache.iceberg.aws.s3.S3FileIO
iceberg.catalog.warehouse=s3://***********/iceberg_tables
iceberg.catalog.client.region=us-east-1
iceberg.control.topic=iceberg-connector-control-v1
iceberg.tables.dynamic-enabled=false
iceberg.tables.upsert-mode-enabled=true
iceberg.tables.evolve-schema-enabled=true
iceberg.tables.auto-create-enabled=true
iceberg.tables=db.account
iceberg.tables.cdc-field=__op
iceberg.tables.default-id-columns=account_id
iceberg.control.commit.interval-ms=60000
# Glue Schema Registry Specific
key.converter=org.apache.kafka.connect.storage.StringConverter
key.converter.schemas.enable=false
key.converter.endpoint=https://glue.us-east-1.amazonaws.com
value.converter=com.amazonaws.services.schemaregistry.kafkaconnect.AWSKafkaAvroConverter
value.converter.schemaAutoRegistrationEnabled=true
value.converter.region=us-east-1
value.converter.avroRecordType=GENERIC_RECORD
value.converter.compatibility=NONE
value.converter.registry.name=testregistry
value.converter.endpoint=https://glue.us-east-1.amazonaws.com
```

I'm testing the use of MSK Connect with IcebergSinkConnector, but I'm having some difficulty making it work.

Iceberg Configs

Glue Schema Registry Specific

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