debzium the request included a message larger than the max message size the server will accept

How to enlarge the maximum size of the message delivered to Kafka?

From: Frequently Asked Questions
For large transactions it is possible that Kafka Connect emits message that is larger then the pre-set maximum. The log usually contains an exception similar to:

org.apache.kafka.common.errors.RecordTooLargeException: The message is 1740572 bytes when serialized which is larger than 1048576, which is the value of the max.request.size configuration.

To solve the issue the configuration option producer.max.request.size must be set in Kafka Connect worker config file connect-distributed.properties. If the global change is not desirable then the connector can override the default setting using configuration option producer.override.max.request.size set to a larger value.
In the latter case it is also necessary to configure connector.client.config.override.policy=ALL option in Kafka Connect worker config file connect-distributed.properties. For Debezium connect Docker image the environment variable CONNECT_CONNECTOR_CLIENT_CONFIG_OVERRIDE_POLICY can be used to configure the option.

See also: spring - org.apache.kafka.common.errors.RecordTooLargeException: The request included a message larger than the max message size the server will accept - Stack Overflow

By default ,Kafka accepts a message of size 1 MB. The size of your message is more than default size.
You need to change the value of the property max.request.size ,message.max.bytes and max.partition.fetch.bytes to fix this issue.
Find the kafka server configuration file 'server.properties' in your system. In Ubuntu , look for the '/etc/systemd/system/kafka.service' file to get the path of 'server.properties'. Open the 'server.properties' file and add the lines below and restart kafka service to increase the message size to ~25MB.

buffer.memory=200000000
max.request.size=200000000
message.max.bytes=200000000
max.partition.fetch.bytes=200000000

Note: Add buffer.memory config to avoid error like "the message is xxx bytes when serialized which is larger than the total memory buffer you have configured with the buffer.memory configuration." (from: java - RecordTooLargeException in kafka - Stack Overflow)
Then restart the kafka server.

See alse: apache zookeeper - How to restart kafka server properly? - Stack Overflow

Otherwise , you can stop your broker using

./bin/kafka-server-stop.sh

and re-start it:

./bin/kafka-server-start.sh config/server.properties

# Or use '-daemon' for background serve.
./bin/kafka-server-start.sh -daemon config/server.properties