Before we do anything, we have to start Kafka first, so let's do it:

[oracle@edvmr1p0 ~]$ kafka-server-start.sh $KAFKA_HOME/config/server.properties
[2020-11-12 12:36:22,697] INFO KafkaConfig values: 
	advertised.host.name = null
	metric.reporters = []
	quota.producer.default = 9223372036854775807
	offsets.topic.num.partitions = 50
	log.flush.interval.messages = 9223372036854775807
	auto.create.topics.enable = true
	controller.socket.timeout.ms = 30000
	log.flush.interval.ms = null
	principal.builder.class = class org.apache.kafka.common.security.auth.DefaultPrincipalBuilder
	replica.socket.receive.buffer.bytes = 65536
	min.insync.replicas = 1
	replica.fetch.wait.max.ms = 500
	num.recovery.threads.per.data.dir = 1
	ssl.keystore.type = JKS
	sasl.mechanism.inter.broker.protocol = GSSAPI
	default.replication.factor = 1
	ssl.truststore.password = null
	log.preallocate = false
	sasl.kerberos.principal.to.local.rules = [DEFAULT]
	fetch.purgatory.purge.interval.requests = 1000
	ssl.endpoint.identification.algorithm = null
	replica.socket.timeout.ms = 30000

[oracle@edvmr1p0 dirprm]$ cat ~/labs/practice05/replicat/prac_5_1/kafka.properties 

gg.handlerlist=kafka
gg.handler.kafka.type=kafka
gg.handler.kafka.KafkaProducerConfigFile=kafka_producer.properties
gg.handler.kafka.TopicName=oggbgtopic
gg.handler.kafka.format=json
gg.handler.kafka.BlockingSend=false
gg.handler.kafka.includeTokens=false
gg.handler.kafka.mode =tx

goldengate.userexit.timestamp=utc
goldengate.userexit.writers=javawriter
javawriter.stats.display=TRUE
javawriter.stats.full=TRUE

gg.log=log4j
gg.log.level=INFO

gg.report.time=30sec
gg.classpath=dirprm/:/opt/kafka/libs/*
jvm.bootoptions=-Xmx512m -Xms32m -Djava.class.path=ggjava/ggjava.jar 

bootstrap.servers=localhost:9092
acks=1
compression.type=gzip
reconnect.backoff.ms=1000

value.serializer=org.apache.kafka.common.serialization.ByteArraySerializer
key.serializer=org.apache.kafka.common.serialization.ByteArraySerializer
batch.size=102400
linger.ms=10000

max.request.size = 5024000
send.buffer.bytes = 5024000

# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# see kafka.server.KafkaConfig for additional details and defaults

############################# Server Basics #############################

# The id of the broker. This must be set to a unique integer for each broker.
broker.id=0
port=9092
delete.topic.enable=true

############################# Socket Server Settings #############################

# The address the socket server listens on. It will get the value returned from 
# java.net.InetAddress.getCanonicalHostName() if not configured.
#   FORMAT:
#     listeners = security_protocol://host_name:port
#   EXAMPLE:
#     listeners = PLAINTEXT://your.host.name:9092
#listeners=PLAINTEXT://:9092

# Hostname and port the broker will advertise to producers and consumers. If not set, 
# it uses the value for "listeners" if configured.  Otherwise, it will use the value
# returned from java.net.InetAddress.getCanonicalHostName().
#advertised.listeners=PLAINTEXT://your.host.name:9092

# The number of threads handling network requests
num.network.threads=3

# The number of threads doing disk I/O
num.io.threads=8

# The send buffer (SO_SNDBUF) used by the socket server
socket.send.buffer.bytes=102400

# The receive buffer (SO_RCVBUF) used by the socket server
socket.receive.buffer.bytes=102400

# The maximum size of a request that the socket server will accept (protection against OOM)
socket.request.max.bytes=104857600


############################# Log Basics #############################

# A comma seperated list of directories under which to store log files
log.dirs=/tmp/kafka-logs

# The default number of log partitions per topic. More partitions allow greater
# parallelism for consumption, but this will also result in more files across
# the brokers.
num.partitions=1

# The number of threads per data directory to be used for log recovery at startup and flushing at shutdown.
# This value is recommended to be increased for installations with data dirs located in RAID array.
num.recovery.threads.per.data.dir=1

############################# Log Flush Policy #############################

# Messages are immediately written to the filesystem but by default we only fsync() to sync
# the OS cache lazily. The following configurations control the flush of data to disk.
# There are a few important trade-offs here:
#    1. Durability: Unflushed data may be lost if you are not using replication.
#    2. Latency: Very large flush intervals may lead to latency spikes when the flush does occur as there will be a lot of data to flush.
#    3. Throughput: The flush is generally the most expensive operation, and a small flush interval may lead to exceessive seeks.
# The settings below allow one to configure the flush policy to flush data after a period of time or
# every N messages (or both). This can be done globally and overridden on a per-topic basis.

# The number of messages to accept before forcing a flush of data to disk
#log.flush.interval.messages=10000

# The maximum amount of time a message can sit in a log before we force a flush
#log.flush.interval.ms=1000

############################# Log Retention Policy #############################

# The following configurations control the disposal of log segments. The policy can
# be set to delete segments after a period of time, or after a given size has accumulated.
# A segment will be deleted whenever *either* of these criteria are met. Deletion always happens
# from the end of the log.

# The minimum age of a log file to be eligible for deletion
log.retention.hours=168

# A size-based retention policy for logs. Segments are pruned from the log as long as the remaining
# segments don't drop below log.retention.bytes.
#log.retention.bytes=1073741824

# The maximum size of a log segment file. When this size is reached a new log segment will be created.
log.segment.bytes=1073741824

# The interval at which log segments are checked to see if they can be deleted according
# to the retention policies
log.retention.check.interval.ms=300000

############################# Zookeeper #############################

# Zookeeper connection string (see zookeeper docs for details).
# This is a comma separated host:port pairs, each corresponding to a zk
# server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002".
# You can also append an optional chroot string to the urls to specify the
# root directory for all kafka znodes.
zookeeper.connect=localhost:2181

# Timeout in ms for connecting to zookeeper
zookeeper.connection.timeout.ms=6000