ksqldb - select * from stream' results in io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor cannot be found - ksqldb

Question

I gave ksqldb a try and made an docker-compose.yml like this:
---
version: '2'
services:
zookeeper:
image: confluentinc/cp-zookeeper:5.3.1
hostname: zookeeper
container_name: zookeeper
ports:
- "2181:2181"
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
broker:
image: confluentinc/cp-enterprise-kafka:5.3.1
hostname: broker
container_name: broker
depends_on:
- zookeeper
ports:
- "29092:29092"
- "9092:9092"
environment:
KAFKA_BROKER_ID: 1
KAFKA_ZOOKEEPER_CONNECT: 'zookeeper:2181'
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092
KAFKA_METRIC_REPORTERS: io.confluent.metrics.reporter.ConfluentMetricsReporter
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
CONFLUENT_METRICS_REPORTER_BOOTSTRAP_SERVERS: broker:29092
CONFLUENT_METRICS_REPORTER_ZOOKEEPER_CONNECT: zookeeper:2181
CONFLUENT_METRICS_REPORTER_TOPIC_REPLICAS: 1
CONFLUENT_METRICS_ENABLE: 'true'
CONFLUENT_SUPPORT_CUSTOMER_ID: 'anonymous'
KAFKA_DELETE_TOPIC_ENABLE: 'true'
KAFKA_MESSAGE_MAX_BYTES: 10000000
KAFKA_MAX_PARTITION_FETCH_BYTES: 10000000
schema-registry:
image: confluentinc/cp-schema-registry:5.3.1
hostname: schema-registry
container_name: schema-registry
depends_on:
- zookeeper
- broker
ports:
- "8081:8081"
environment:
SCHEMA_REGISTRY_HOST_NAME: schema-registry
SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: 'zookeeper:2181'
connect:
image: confluentinc/cp-server-connect:5.3.1
hostname: connect
container_name: connect
depends_on:
- zookeeper
- broker
- schema-registry
ports:
- "8083:8083"
volumes:
- C:\WS\prototypes\POCONE\Werkstatt\connect-coppclark\target:/usr/share/java/coppclark
environment:
CONNECT_BOOTSTRAP_SERVERS: 'broker:29092'
CONNECT_REST_ADVERTISED_HOST_NAME: connect
CONNECT_REST_PORT: 8083
CONNECT_GROUP_ID: compose-connect-group
CONNECT_CONFIG_STORAGE_TOPIC: docker-connect-configs
CONNECT_CONFIG_STORAGE_REPLICATION_FACTOR: 1
CONNECT_OFFSET_FLUSH_INTERVAL_MS: 10000
CONNECT_OFFSET_STORAGE_TOPIC: docker-connect-offsets
CONNECT_OFFSET_STORAGE_REPLICATION_FACTOR: 1
CONNECT_STATUS_STORAGE_TOPIC: docker-connect-status
CONNECT_STATUS_STORAGE_REPLICATION_FACTOR: 1
CONNECT_KEY_CONVERTER: org.apache.kafka.connect.storage.StringConverter
CONNECT_VALUE_CONVERTER: io.confluent.connect.avro.AvroConverter
CONNECT_VALUE_CONVERTER_SCHEMA_REGISTRY_URL: http://schema-registry:8081
CONNECT_INTERNAL_KEY_CONVERTER: "org.apache.kafka.connect.json.JsonConverter"
CONNECT_INTERNAL_VALUE_CONVERTER: "org.apache.kafka.connect.json.JsonConverter"
CONNECT_ZOOKEEPER_CONNECT: 'zookeeper:2181'
# CLASSPATH required due to CC-2422
CLASSPATH: /usr/share/java/monitoring-interceptors/monitoring-interceptors-5.3.1.jar
CONNECT_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor"
CONNECT_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor"
CONNECT_PLUGIN_PATH: "/usr/share/java,/usr/share/confluent-hub-components"
CONNECT_LOG4J_LOGGERS: org.apache.zookeeper=ERROR,org.I0Itec.zkclient=ERROR,org.reflections=ERROR
COMPOSE_CONVERT_WINDOWS_PATHS: 1
CONNECT_PRODUCER_MAX_REQUEST_SIZE: 10000000
CONNECT_CONSUMER_MAX_PARTITION_FETCH_BYTES: 10000000
# https://docs:ksqldb:io/en/latest/operate-and-deploy/installation/server-config/integrate-ksql-with-confluent-control-center/:
control-center:
image: confluentinc/cp-enterprise-control-center:5.3.1
hostname: control-center
container_name: control-center
depends_on:
- zookeeper
- broker
- schema-registry
- connect
- ksqldb-server
ports:
- "9021:9021"
environment:
CONTROL_CENTER_BOOTSTRAP_SERVERS: 'broker:29092'
CONTROL_CENTER_ZOOKEEPER_CONNECT: 'zookeeper:2181'
CONTROL_CENTER_CONNECT_CLUSTER: 'connect:8083'
CONTROL_CENTER_KSQL_URL: "http://ksqldb-server:8088"
CONTROL_CENTER_KSQL_ADVERTISED_URL: "http://localhost:8088"
CONTROL_CENTER_SCHEMA_REGISTRY_URL: "http://schema-registry:8081"
CONTROL_CENTER_REPLICATION_FACTOR: 1
CONTROL_CENTER_INTERNAL_TOPICS_PARTITIONS: 1
CONTROL_CENTER_MONITORING_INTERCEPTOR_TOPIC_PARTITIONS: 1
CONFLUENT_METRICS_TOPIC_REPLICATION: 1
PORT: 9021
rest-proxy:
image: confluentinc/cp-kafka-rest:5.3.1
depends_on:
- zookeeper
- broker
- schema-registry
ports:
- 8082:8082
hostname: rest-proxy
container_name: rest-proxy
environment:
KAFKA_REST_HOST_NAME: rest-proxy
KAFKA_REST_BOOTSTRAP_SERVERS: 'broker:29092'
KAFKA_REST_LISTENERS: "http://0.0.0.0:8082"
KAFKA_REST_SCHEMA_REGISTRY_URL: 'http://schema-registry:8081'
ksqldb-server:
image: confluentinc/ksqldb-server:0.6.0
hostname: ksqldb-server
container_name: ksqldb-server
depends_on:
- broker
- connect
ports:
- "8088:8088"
environment:
KSQL_CONFIG_DIR: "/etc/ksql"
KSQL_APPLICATION_ID: "cp-all-in-one"
KSQL_LISTENERS: http://0.0.0.0:8088
KSQL_BOOTSTRAP_SERVERS: broker:29092
KSQL_HOST_NAME: ksqldb-server
KSQL_KSQL_CONNECT_URL: http://connect:8083
KSQL_KSQL_LOGGING_PROCESSING_STREAM_AUTO_CREATE: "true"
KSQL_KSQL_LOGGING_PROCESSING_TOPIC_AUTO_CREATE: "true"
KSQL_KSQL_SCHEMA_REGISTRY_URL: "http://schema-registry:8081"
KSQL_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor"
KSQL_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor"
KSQL_CACHE_MAX_BYTES_BUFFERING: 0
ksqldb-cli:
image: confluentinc/ksqldb-cli:0.6.0
container_name: ksqldb-cli
depends_on:
- broker
- ksqldb-server
entrypoint: /bin/sh
tty: true
# coppclark- static resources
coppclark-static-http:
image: springcloudstream/coppclarkstatic:0.0.1-SNAPSHOT
container_name: coppclark-static-http
ports:
- '8080:8080'
expose:
- '8080'
then created a new (custom) connector from within ksqldb
CREATE SOURCE CONNECTOR holidayEvent WITH (
'connector.class' = 'CoppclarkSourceConnector',
'topic' = 'holidayEvent',
'url' = 'http://coppclark-static-http:8080/coppclark.csv',
'csv.parser' = true
);
which results in records like this (in topic holidayEvent):
{
"CENTER_ID": "150",
"ISO_CURRENCY_CODE": "SRD",
"ISO_COUNTRY_CODE": "SR",
"RELATED_FINANCIAL_CENTER": "Paramaribo",
"EVENT_YEAR": "2067",
"EVENT_DATE": "20671225",
"EVENT_DAY_OF_WEEK": "Sun",
"EVENT_nAME": "Christmas Day",
"FILE_TYPE": "C"
}
A stream has been made
CREATE STREAM holidayEventStream WITH(kafka_topic='holidayEvent', value_format='AVRO');
So far so good, but then when I want to select from this created Stream I got following errror:
ksql> select * from HOLIDAYEVENTSTREAM EMIT CHANGES;
Failed to construct kafka consumer
Caused by: Class
io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor cannot
be found
Caused by:
io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor
I'm sure I missed something but don't know what to do next.
Regards
Rene

Answer 1

Remove these two lines from your ksqldb-server service:
KSQL_PRODUCER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringProducerInterceptor"
KSQL_CONSUMER_INTERCEPTOR_CLASSES: "io.confluent.monitoring.clients.interceptor.MonitoringConsumerInterceptor"
The interceptors are not shipped with ksqlDB 0.6.