JMX Trans提供“已在使用的端口”，但该端口是免费的

Question

我正在尝试使用jmxtrans将Kafka的度量标准发送到Influxdb。我已经关闭了jar文件，并为我的情况配置了必要的文件。当我尝试以JAR_FILE=jmxtrans-259-all.jar jmxtrans.sh jvm.json的形式启动jmxtrans时，它会给出Port already in use: 5555错误(5555是jmx端口)。我的kafka systemd文件(prometheus不使用jmx端口)：

[Unit]
Description=Apache Kafka Server (broker)
Documentation=http://kafka.apache.org/documentation.html
Requires=kafka-zookeeper.service
After=network.target remote-fs.target kafka-zookeeper.service

[Service]
Type=simple
User=kafka
Group=confluent
WorkingDirectory=/etc/systemd/system/
ExecStart=/bin/bash /etc/systemd/system/kafka
Restart=always
Environment="KAFKA_OPTS=-javaagent:/kafka/vty/jmx_prometheus_javaagent-0.3.1.jar=7080:/kafka/vty/kafka-0-8-2.yml"
#Environment="JMX_PORT=5555"
Environment="KAFKA_JMX_OPTS=-Dcom.sun.management.jmxremote=true -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=isstdkafld01 -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote.port=5555"

[Install]
WantedBy=multi-user.target

我很确定没有进程使用5555端口，除了kafka (PID 17397是kafka)。netstat -nltp还确认：

Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:7081            0.0.0.0:*               LISTEN      124801/java         
tcp        0      0 0.0.0.0:2191            0.0.0.0:*               LISTEN      124801/java         
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      1184/rpcbind        
tcp        0      0 0.0.0.0:9072            0.0.0.0:*               LISTEN      17397/java          
tcp        0      0 0.0.0.0:20048           0.0.0.0:*               LISTEN      1637/rpc.mountd     
tcp        0      0 0.0.0.0:5555            0.0.0.0:*               LISTEN      17397/java          
tcp        0      0 0.0.0.0:36629           0.0.0.0:*               LISTEN      17397/java          
tcp        0      0 0.0.0.0:33429           0.0.0.0:*               LISTEN      17397/java          
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      10716/sshd          
tcp        0      0 0.0.0.0:43675           0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:45759           0.0.0.0:*               LISTEN      1649/rpc.statd      
tcp        0      0 0.0.0.0:2049            0.0.0.0:*               LISTEN      -                   
tcp        0      0 0.0.0.0:34183           0.0.0.0:*               LISTEN      124801/java         
tcp        0      0 0.0.0.0:7080            0.0.0.0:*               LISTEN      17397/java          
tcp6       0      0 :::9519                 :::*                    LISTEN      94054/nsrexecd      
tcp6       0      0 :::111                  :::*                    LISTEN      1184/rpcbind        
tcp6       0      0 :::20048                :::*                    LISTEN      1637/rpc.mountd     
tcp6       0      0 :::8370                 :::*                    LISTEN      94054/nsrexecd      
tcp6       0      0 :::8146                 :::*                    LISTEN      94054/nsrexecd      
tcp6       0      0 :::4118                 :::*                    LISTEN      28915/ds_agent      
tcp6       0      0 :::3000                 :::*                    LISTEN      20644/grafana-serve 
tcp6       0      0 :::7937                 :::*                    LISTEN      94054/nsrexecd      
tcp6       0      0 :::41537                :::*                    LISTEN      -                   
tcp6       0      0 :::2049                 :::*                    LISTEN      -                   
tcp6       0      0 :::9090                 :::*                    LISTEN      123916/prometheus   
tcp6       0      0 :::7938                 :::*                    LISTEN      94054/nsrexecd      
tcp6       0      0 :::33443                :::*                    LISTEN      1649/rpc.statd

可能是什么原因？请注意，当我尝试使用另一个不是jmx端口的端口时，它不会给出这个错误，而是进行超时。我使用的文件如下所示。

jvm.json (8086是进水数据库的端口)

{
  "servers" : [ {
    "port" : "9072",
    "host" : "xxxxxxxxxx",
    "alias": "kafka-1",
    "queries" : [ {
      "outputWriters" : [
      {
        "@class" : "com.googlecode.jmxtrans.model.output.InfluxDbWriterFactory",
        "url" : "http://xxxxxxxxxx:8086/",
        "database" : "kafka",
        "username" : "admin",
        "password" : "admin"
      } ],
      "obj" : "java.lang:type=Memory",
      "attr" : [ "HeapMemoryUsage", "NonHeapMemoryUsage" ],
      "resultAlias" : "jvmMemory"
    }
    ],
    "numQueryThreads" : 1
  } ]
}

jmxtrans.sh

#!/bin/bash
#
# The MIT License
# Copyright © 2010 JmxTrans team
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#

if (( $# != 1 )); then
  echo "Usage: jmxtrans.sh <json file or dir>"
  exit 1
fi

if [[ -f "${1}" ]]; then
  JSON_CONFIG_OPT="-f ${1}"
elif [[ -d "${1}" ]]; then
  JSON_CONFIG_OPT="-j ${1}"
else
  echo "${1} is not a file nor a directory"
  exit 1
fi

JAVA_HOME=${JAVA_HOME:-"/usr"}
LOG_DIR=${LOG_DIR:-"."}

if [[ "${JAR_FILE}" == "" ]]; then
  JAR_FILE="$( cd "$( dirname "${BASH_SOURCE[0]}" )/../lib" >/dev/null && pwd )/jmxtrans-all.jar"
fi
ADDITIONAL_JARS=${ADDITIONAL_JARS:-""}
SECONDS_BETWEEN_RUNS=${SECONDS_BETWEEN_RUNS:-"60"}

JAVA=${JAVA:-"${JAVA_HOME}/bin/java"}
CHECK_JAVA=${CHECK_JAVA:-"true"}
JAVA_OPTS=${JAVA_OPTS:-"-Djava.awt.headless=true -Djava.net.preferIPv4Stack=true"}
HEAP_SIZE=${HEAP_SIZE:-"512"}
PERM_SIZE=${PERM_SIZE:-"384"}
MAX_PERM_SIZE=${MAX_PERM_SIZE:-"384"}
JMX_PORT=${JMX_PORT:-"5555"}
LOG_LEVEL=${LOG_LEVEL:-"info"}
CONTINUE_ON_ERROR=${CONTINUE_ON_ERROR:-"false"}
JMXTRANS_OPTS="${JMXTRANS_OPTS} -Djmxtrans.log.level=${LOG_LEVEL} -Djmxtrans.log.dir=${LOG_DIR}"


MONITOR_OPTS=${MONITOR_OPTS:-"-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=${JMX_PORT}"}
GC_OPTS=${GC_OPTS:-"-Xms${HEAP_SIZE}m -Xmx${HEAP_SIZE}m"}
SSL_OPTS=${SSL_OPTS:-""}
if [[ "${SSL_TRUSTSTORE}" != "" ]]; then
    SSL_OPTS="${SSL_OPTS} -Djavax.net.ssl.trustStore=${SSL_TRUSTSTORE}"
    if [[ "${SSL_TRUSTSTORE_PASSWORD}" != "" ]]; then
        SSL_OPTS="${SSL_OPTS} -Djavax.net.ssl.trustStorePassword=${SSL_TRUSTSTORE_PASSWORD}"
    fi
fi

if [[ "${ADDITIONAL_JARS}" == "" ]]; then
  ADDITIONAL_JARS_OPTS=""
else
  ADDITIONAL_JARS_OPTS="-a ${ADDITIONAL_JARS}"
fi

if [[ "${CHECK_JAVA}" == "true" ]]; then
    JAVA_VERSION=`${JAVA} -version 2>&1`
    if [[ $? != 0 ]]; then
        echo "Cannot execute ${JAVA}!"
        exit 1
    fi
fi

if [[ ! -f ${JAR_FILE} ]]; then
  echo "File not found - ${JAR_FILE}"
  exit 1
fi

EXEC=${EXEC:-"-jar ${JAR_FILE} -e ${JSON_CONFIG_OPT} -s ${SECONDS_BETWEEN_RUNS} -c ${CONTINUE_ON_ERROR} ${ADDITIONAL_JARS_OPTS} ${ADDITIONAL_OPTS}"}

${JAVA} -server ${JAVA_OPTS} ${JMXTRANS_OPTS} ${GC_OPTS} ${MONITOR_OPTS} ${SSL_OPTS} ${EXEC}

Answer 1

将JMX_PORT=${JMX_PORT:-"5555"}行保留在jmxtrans.sh中作为其默认值，2101解决了这个问题。

Answer 2

解决已经使用的问题：

打开你的航站楼：

ps aux || grep

列出所有正在运行的服务，并找到要杀死的id。

sudo kill -9 <id you want to kill>