Network issue: If there is a problem with the network, the Kafka producer may not be able to connect to the Kafka broker, resulting in message sending failures.
If the specified partition is unavailable, the Kafka producer will not be able to send messages to it.
Producer configuration error: If there is a mistake in the Kafka producer configuration, such as specifying the wrong broker address or partition number, message sending will also fail.
Message too big: Kafka has a limit on message size, and if the message sent exceeds this limit, the message sending will also fail.
Persistence error: If there is an error while Kafka broker persists messages, the message sending will also fail.
If the Kafka producer is unable to serialize a message, such as due to a message format error or mismatched serializer, the message sending will also fail.
Insufficient permissions: If the Kafka producer does not have enough permissions to send messages, the message sending will also fail.
