rocketMQ 4.5.x + 在jdk8+的环境启动

官方下载的源码或者压缩包在jdk8的环境下没什么问题，按照步骤来就启动了
但是在jdk9 ，10，11的环境下就无法启动了，官方git的issure和百度都能找到相应解决方案
但是大多没说一些特殊情况，而且是非常隐蔽的特殊情况

情况1 升级之前已经使用jdk8启动过mq

这种情况比较普遍吧，按照官方教程，注释、修改了runserver和runbroker还有tools三个文件的启动脚本之后

参数修改可以参考https://www.cnblogs.com/wintersoft/p/10881601.html
在out启动日志里不再报错之后，才到下面的处理步骤

启动server正常，启动broker就失败了，并且在几个日志里几乎找不到任何报错信息(broker的启动日志，还有gc日志里，其他地方没注意，我下的是压缩包，源码启动估计能看到具体信息)此时需要删除MQ在用户目录下生成的store文件夹里的内容，然后再启动，这一点上，就加大了生产环境升级的难度，所以生产环境使用了rocketmq最好不要更换jdk，如果必要，记得把消费、生产、topic这些数据备份下来考虑怎么还原的问题，而且能不能还原并没证实过（主要是还没被消费过的消息）

情况2 关闭broker抛出了InaccessibleObjectException异常

在运行了mqshutdown broker之后抛InaccessibleObjectException异常，Unable to make public void jdk.internal.ref.Cleaner.clean() accessible,

这个主要是jdk9+模块化编程的新特性引起的，看到一个大佬的解决方案后完美解决

https://blog.csdn.net/zhxdick/article/details/90514045

在runbroker的启动脚本里添加一句启动参数就行了

JAVA_OPT="${JAVA_OPT} --add-exports java.base/jdk.internal.ref=ALL-UNNAMED"

最后再提一句，broker被异常中断之后，很有可能导致后面broker无法再启动，必须要删除store文件夹的问题，主要是服务器断电这种情况，云服务器一般不太会有这种情况，主要是我本地测试的时候发现的，windows系统，电脑一旦断电闪了，等来电开机broker就废了，linux没试过拔插头，不过感觉应该也存在这个问题，而删store文件夹，意味着整个执行中的业务，全部报废，这个问题一旦发生在生产环境特别灾难，所以抽空还是研究下怎么还原未被消费的消息好了。

附上三个启动文件更改后的脚本，windows脚本差不多

runserver.sh

#!/bin/sh# 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.#===========================================================================================
# Java Environment Setting
#===========================================================================================
error_exit ()
{echo "ERROR: $1 !!"exit 1
}[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=$HOME/jdk/java
[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java
[ ! -e "$JAVA_HOME/bin/java" ] && error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)!"#export JAVA_HOME="/usr/lib/jvm/java-8-openjdk"
export JAVA_HOME
export JAVA="$JAVA_HOME/bin/java"
export BASE_DIR=$(dirname $0)/..
#export CLASSPATH=.:${BASE_DIR}/conf:${CLASSPATH}
export CLASSPATH=${BASE_DIR}/lib/rocketmq-namesrv-4.8.0.jar:${BASE_DIR}/lib/*:${BASE_DIR}/conf:${CLASSPATH}:${CLASS_PATH}
#===========================================================================================
# JVM Configuration
#===========================================================================================
# The RAMDisk initializing size in MB on Darwin OS for gc-log
DIR_SIZE_IN_MB=600choose_gc_log_directory()
{case "`uname`" inDarwin)if [ ! -d "/Volumes/RAMDisk" ]; then# create ram disk on Darwin systems as gc-log directoryDEV=`hdiutil attach -nomount ram://$((2 * 1024 * DIR_SIZE_IN_MB))` > /dev/nulldiskutil eraseVolume HFS+ RAMDisk ${DEV} > /dev/nullecho "Create RAMDisk /Volumes/RAMDisk for gc logging on Darwin OS."fiGC_LOG_DIR="/Volumes/RAMDisk";;*)# check if /dev/shm exists on other systemsif [ -d "/dev/shm" ]; thenGC_LOG_DIR="/dev/shm"elseGC_LOG_DIR=${BASE_DIR}fi;;esac
}choose_gc_options()
{# Example of JAVA_MAJOR_VERSION value : '1', '9', '10', '11', ...# '1' means releases befor Java 9JAVA_MAJOR_VERSION=$("$JAVA" -version 2>&1 | sed -E -n 's/.* version "([0-9]*).*$/\1/p')if [[ "$JAVA_MAJOR_VERSION" -lt "9" ]] ; thenJAVA_OPT="${JAVA_OPT} -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccupancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX:SurvivorRatio=8 -XX:-UseParNewGC"JAVA_OPT="${JAVA_OPT} -verbose:gc -Xloggc:${GC_LOG_DIR}/rmq_srv_gc_%p_%t.log -XX:+PrintGCDetails"JAVA_OPT="${JAVA_OPT} -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=30m"elseJAVA_OPT="${JAVA_OPT} -XX:+UseG1GC -XX:G1HeapRegionSize=16m -XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 -XX:SoftRefLRUPolicyMSPerMB=0"JAVA_OPT="${JAVA_OPT} -Xlog:gc*:file=${GC_LOG_DIR}/rmq_srv_gc_%p_%t.log:time,tags:filecount=5,filesize=30M"fi
}choose_gc_log_directoryJAVA_OPT="${JAVA_OPT} -server -Xms256m -Xmx512m -Xmn128m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m"
choose_gc_options
JAVA_OPT="${JAVA_OPT} -XX:-OmitStackTraceInFastThrow"
JAVA_OPT="${JAVA_OPT} -XX:-UseLargePages"
#JAVA_OPT="${JAVA_OPT} -Djava.ext.dirs=${JAVA_HOME}/jre/lib/ext:${BASE_DIR}/lib:${JAVA_HOME}/lib/ext"
JAVA_OPT="${JAVA_OPT} ${JAVA_OPT_EXT}"
JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"$JAVA ${JAVA_OPT} $@

runbroker.sh

#!/bin/sh# 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.#===========================================================================================
# Java Environment Setting
#===========================================================================================
error_exit ()
{echo "ERROR: $1 !!"exit 1
}#[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=$HOME/jdk/java
#[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java
#[ ! -e "$JAVA_HOME/bin/java" ] && error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)!"export JAVA_HOME="/usr/lib/jvm/java-11-openjdk"
#export JAVA_HOME
export JAVA="$JAVA_HOME/bin/java"
export BASE_DIR=$(dirname $0)/..
#export CLASSPATH=.:${BASE_DIR}/conf:${CLASSPATH}
export CLASSPATH=${BASE_DIR}/lib/rocketmq-broker-4.8.0.jar:${BASE_DIR}/lib/*:${BASE_DIR}/conf:${CLASSPATH}
#===========================================================================================
# JVM Configuration
#===========================================================================================
# The RAMDisk initializing size in MB on Darwin OS for gc-log
DIR_SIZE_IN_MB=600choose_gc_log_directory()
{case "`uname`" inDarwin)if [ ! -d "/Volumes/RAMDisk" ]; then# create ram disk on Darwin systems as gc-log directoryDEV=`hdiutil attach -nomount ram://$((2 * 1024 * DIR_SIZE_IN_MB))` > /dev/nulldiskutil eraseVolume HFS+ RAMDisk ${DEV} > /dev/nullecho "Create RAMDisk /Volumes/RAMDisk for gc logging on Darwin OS."fiGC_LOG_DIR="/Volumes/RAMDisk";;*)# check if /dev/shm exists on other systemsif [ -d "/dev/shm" ]; thenGC_LOG_DIR="/dev/shm"elseGC_LOG_DIR=${BASE_DIR}fi;;esac
}choose_gc_log_directoryJAVA_OPT="${JAVA_OPT} -server -Xms256m -Xmx512m -Xmn128m"
JAVA_OPT="${JAVA_OPT} --add-exports java.base/jdk.internal.ref=ALL-UNNAMED"
JAVA_OPT="${JAVA_OPT} -XX:+UseG1GC -XX:G1HeapRegionSize=16m -XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 -XX:SoftRefLRUPolicyMSPerMB=0"
#JAVA_OPT="{JAVA_OPT} -verbose:gc -Xloggc:{GC_LOG_DIR}/rmq_broker_gc_%p_%t.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCApplicationStoppedTime -XX:+PrintAdaptiveSizePolicy"
JAVA_OPT="${JAVA_OPT} -Xlog:gc*:file=${GC_LOG_DIR}/rmq_broker_gc_%p_%t.log:time,tags:filecount=5,filesize=30M"
#JAVA_OPT="${JAVA_OPT} -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=30m"
JAVA_OPT="${JAVA_OPT} -XX:-OmitStackTraceInFastThrow"
JAVA_OPT="${JAVA_OPT} -XX:+AlwaysPreTouch"
#JAVA_OPT="${JAVA_OPT} -XX:MaxDirectMemorySize=15g"
JAVA_OPT="${JAVA_OPT} -XX:-UseLargePages -XX:-UseBiasedLocking"
#JAVA_OPT="{JAVA_OPT} -Djava.ext.dirs={JAVA_HOME}/jre/lib/ext:{BASE_DIR}/lib:BASE
JAVA_OPT="${JAVA_OPT} ${JAVA_OPT_EXT}"
JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"numactl --interleave=all pwd > /dev/null 2>&1
if [ $? -eq 0 ]
thenif [ -z "$RMQ_NUMA_NODE" ] ; thennumactl --interleave=all $JAVA ${JAVA_OPT} $@elsenumactl --cpunodebind=$RMQ_NUMA_NODE --membind=$RMQ_NUMA_NODE $JAVA ${JAVA_OPT} $@fi
else$JAVA ${JAVA_OPT} $@
fi

tools.sh

#!/bin/sh# 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.#===========================================================================================
# Java Environment Setting
#===========================================================================================
error_exit ()
{echo "ERROR: $1 !!"exit 1
}[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=$HOME/jdk/java
[ ! -e "$JAVA_HOME/bin/java" ] && JAVA_HOME=/usr/java
[ ! -e "$JAVA_HOME/bin/java" ] && error_exit "Please set the JAVA_HOME variable in your environment, We need java(x64)!"#export JAVA_HOME="/usr/lib/jvm/java-11-openjdk"
export JAVA_HOME
export JAVA="$JAVA_HOME/bin/java"
export BASE_DIR=$(dirname $0)/..
#export CLASSPATH=.:${BASE_DIR}/conf:${CLASSPATH}
export CLASSPATH=${BASE_DIR}/lib/rocketmq-tools-4.8.0.jar:${BASE_DIR}/lib/*:${BASE_DIR}/conf:${CLASSPATH}:${CLASS_PATH}#===========================================================================================
# JVM Configuration
#===========================================================================================
JAVA_OPT="${JAVA_OPT} -server -Xms1g -Xmx1g -Xmn256m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=128m"
#JAVA_OPT="${JAVA_OPT} -Djava.ext.dirs=${BASE_DIR}/lib:${JAVA_HOME}/jre/lib/ext:${JAVA_HOME}/lib/ext"
JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"$JAVA ${JAVA_OPT} "$@"

我这使用的是4.8.0的，4.8.0的官方在server和broker里内置了jdk>8的判断附加的启动参数，如果是4.7.0或者4.5.0的版本把if else里的那两个启动参数复制到下面的JAVA_OPT里就行了
最主要的还是注释源于的JAVA_OPT的几个参数，还有CLASSPATH的指向，CLASSPATH不改启动会一直报找不到主启动类的错

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