quickStart是遇到问题

centos7命令界面

[root@localhost ~]# ll

总用量 222704

-rw-r--r--. 1 root root  44760203 5月  14 15:30 eureka-server-0.0.1-SNAPSHOT.jar

-rw-r--r--. 1 root root 174204631 5月  14 15:13 jdk-8u162-linux-x64.rpm

drwxr-xr-x. 2 root root         6 6月  20 18:31 rocketmq

-rw-r--r--. 1 root root   9080492 12月 18 2017 rocketmq-all-4.2.0-bin-release.zip

[root@localhost ~]# unzip rocketmq-all-4.2.0-bin-release.zip -d rocketmq

Archive:  rocketmq-all-4.2.0-bin-release.zip

   creating: rocketmq/conf/

   creating: rocketmq/conf/2m-2s-async/

   creating: rocketmq/conf/2m-2s-sync/

   creating: rocketmq/conf/2m-noslave/

   creating: rocketmq/benchmark/

   creating: rocketmq/bin/

   creating: rocketmq/lib/

  inflating: rocketmq/LICENSE        

  inflating: rocketmq/conf/2m-2s-async/broker-a.properties  

....

  inflating: rocketmq/lib/guava-19.0.jar  

[root@localhost ~]# cd rocketmq

[root@localhost rocketmq]# nohup sh bin/mqnamesrv &

[1] 6846

[root@localhost rocketmq]# nohup: 忽略输入并把输出追加到"nohup.out"

[1]+  退出 1                nohup sh bin/mqnamesrv

[root@localhost rocketmq]# ll

总用量 56

drwxr-xr-x. 2 root root    83 12月 13 2017 benchmark

drwxr-xr-x. 2 root root  4096 12月 13 2017 bin

drwxr-xr-x. 5 root root   187 12月 13 2017 conf

-rw-r--r--. 1 root root 14445 6月  20 18:32 hs_err_pid6852.log

drwxr-xr-x. 2 root root  4096 12月 13 2017 lib

-rw-r--r--. 1 root root 17336 9月  19 2017 LICENSE

-rw-------. 1 root root   717 6月  20 18:32 nohup.out

-rw-r--r--. 1 root root  1337 10月 18 2017 NOTICE

-rw-r--r--. 1 root root  2426 10月 18 2017 README.md

启动mq命名服务失败，当前目录里多出2个文件【hs_err_pid6852.log和nohup.out】，hs_err_pid6852.log文件里的内容是错误日志，而nohup.out文件里的内容是控制台打印输出的东西。

nohup.out内容如下：

[root@localhost rocketmq]# cat nohup.out

Java HotSpot(TM) 64-Bit Server VM warning: Using the DefNew young collector with the CMS collector is deprecated and will likely be removed in a future release

Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release.

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000006ec800000, 2147483648, 0) failed; error='Cannot allocate memory' (errno=12)

#

# There is insufficient memory for the Java Runtime Environment to continue.

# Native memory allocation (mmap) failed to map 2147483648 bytes for committing reserved memory.

# An error report file with more information is saved as:

# /root/rocketmq/hs_err_pid6852.log

[root@localhost rocketmq]# 

意思就是分配2g heap不够内存空间,为什么映射到2g位置时报错？？

启动时jvm参数配置如下

[root@localhost rocketmq]# cat bin/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

export JAVA="$JAVA_HOME/bin/java"

export BASE_DIR=$(dirname $0)/..

export CLASSPATH=.:${BASE_DIR}/conf:${CLASSPATH}

#===========================================================================================

# JVM Configuration

#===========================================================================================

JAVA_OPT="${JAVA_OPT} -server -Xms4g -Xmx4g -Xmn2g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m"

JAVA_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:/dev/shm/rmq_srv_gc.log -XX:+PrintGCDetails"

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_OPT="${JAVA_OPT} -Xdebug -Xrunjdwp:transport=dt_socket,address=9555,server=y,suspend=n"

JAVA_OPT="${JAVA_OPT} ${JAVA_OPT_EXT}"

JAVA_OPT="${JAVA_OPT} -cp ${CLASSPATH}"

$JAVA ${JAVA_OPT} $@

-Xms4g【heap初始大小4g】 -Xmx4g【heap最大大小4g】 -Xmn2g【年轻代大小2g】