kafka开启JMX

如果直接 修改 kafka-run-class.sh 脚本，第一行增加 JMX_PORT=9988 。 会导致消费者消费失败

Error: Exception thrown by the agent : java.rmi.server.ExportException: Port already in use: 9999; nested exception is:
java.net.BindException: Address already in use (Bind failed)

在kafka-server-start.sh  添加一条 export JMX_PORT=9988  即可

[root@kkkk04 ~]# docker exec  -it kafka cat /opt/kafka_2.12-2.2.1/bin/kafka-server-start.sh 
#!/bin/bash
# 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.
if [ $# -lt 1 ];
	echo "USAGE: $0 [-daemon] server.properties [--override property=value]*"
	exit 1
base_dir=$(dirname $0)
if [ "x$KAFKA_LOG4J_OPTS" = "x" ]; then
    export KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file:$base_dir/../config/log4j.properties"
if [ "x$KAFKA_HEAP_OPTS" = "x" ]; then
    export KAFKA_HEAP_OPTS="-Xmx1G -Xms1G"
EXTRA_ARGS=${EXTRA_ARGS-'-name kafkaServer -loggc'}
COMMAND=$1
case $COMMAND in
  -daemon)
    EXTRA_ARGS="-daemon "$EXTRA_ARGS
    shift
export JMX_PORT=9988
exec $base_dir/kafka-run-class.sh $EXTRA_ARGS kafka.Kafka "$@"
参考:kafka开启jmx_port后，报端口被占用