Simulate Invalid Schema ID

Introduction

Simulate invalid schema id will overwrite an invalid schemaId value to the records.

Because schemaId is overwritten with an invalid value, the following error is returned when consuming records:

Processed a total of 1 messages
[2022-11-17 15:59:13,184] ERROR Unknown error when running consumer:  (kafka.tools.ConsoleConsumer$)
org.apache.kafka.common.errors.SerializationException: Error retrieving JSON schema for id 999
	at io.confluent.kafka.serializers.AbstractKafkaSchemaSerDe.toKafkaException(AbstractKafkaSchemaSerDe.java:259)
	at io.confluent.kafka.serializers.json.AbstractKafkaJsonSchemaDeserializer.deserialize(AbstractKafkaJsonSchemaDeserializer.java:182)
	at io.confluent.kafka.formatter.json.JsonSchemaMessageFormatter$JsonSchemaMessageDeserializer.deserialize(JsonSchemaMessageFormatter.java:130)
	at io.confluent.kafka.formatter.json.JsonSchemaMessageFormatter$JsonSchemaMessageDeserializer.deserialize(JsonSchemaMessageFormatter.java:103)
	at io.confluent.kafka.formatter.json.JsonSchemaMessageFormatter.writeTo(JsonSchemaMessageFormatter.java:94)
	at io.confluent.kafka.formatter.SchemaMessageFormatter.writeTo(SchemaMessageFormatter.java:181)
	at kafka.tools.ConsoleConsumer$.process(ConsoleConsumer.scala:116)
	at kafka.tools.ConsoleConsumer$.run(ConsoleConsumer.scala:76)
	at kafka.tools.ConsoleConsumer$.main(ConsoleConsumer.scala:53)
	at kafka.tools.ConsoleConsumer.main(ConsoleConsumer.scala)
Caused by: io.confluent.kafka.schemaregistry.client.rest.exceptions.RestClientException: Schema 999 not found; error code: 40403
	at io.confluent.kafka.schemaregistry.client.rest.RestService.sendHttpRequest(RestService.java:301)
	at io.confluent.kafka.schemaregistry.client.rest.RestService.httpRequest(RestService.java:371)
	at io.confluent.kafka.schemaregistry.client.rest.RestService.getId(RestService.java:840)
	at io.confluent.kafka.schemaregistry.client.rest.RestService.getId(RestService.java:813)
	at io.confluent.kafka.schemaregistry.client.CachedSchemaRegistryClient.getSchemaByIdFromRegistry(CachedSchemaRegistryClient.java:294)
	at io.confluent.kafka.schemaregistry.client.CachedSchemaRegistryClient.getSchemaBySubjectAndId(CachedSchemaRegistryClient.java:417)
	at io.confluent.kafka.serializers.json.AbstractKafkaJsonSchemaDeserializer.deserialize(AbstractKafkaJsonSchemaDeserializer.java:119)
	... 8 more

See more about schema registry and schema-id here

Configuration

key	type	default	description
topic	String	.*	Topics that match this regex will have the interceptor applied
invalidSchemaId	integer		Invalid schema id, if not passed the value will be random
target	enum	CONSUME	SchemaId is overwritten with an invalid value in the record when the client produces or consumes the record, values can be PRODUCE or CONSUME

Example

{
  "name": "mySimulateInvalidSchemaIdInterceptor",
  "pluginClass": "io.conduktor.gateway.interceptor.chaos.SimulateInvalidSchemaIdPlugin",
  "priority": 100,
  "config": {
    "topic": "topic.*",
    "invalidSchemaId": 9999,
    "target": "PRODUCE"
  }
}