RocketMQ4.8.0在linux中的一个小错误

运行异常信息

  在Linux下运行mqnamesrv命令后，报如下所示错误，

....runserver.sh: 70
....runserver.sh: [[: not found
Unrecognized option: -Xlog:gc*:file=/dev/shm/rmq_srv_gc_%p_%t.log:time,tags:filecount=5,filesize=30M
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

解决方案

  根据异常定位在70行，如下所示：

JAVA_MAJOR_VERSION=$("$JAVA" -version 2>&1 | sed -E -n 's/.* version "([0-9]*).*$/\1/p')
if [[ "$JAVA_MAJOR_VERSION" -lt "9" ]] ; then
    JAVA_OPT="${JAVA_OPT} -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:CMSInitiatingOccup    ancyFraction=70 -XX:+CMSParallelRemarkEnabled -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+CMSClassUnloadingEnabled -XX    :SurvivorRatio=8 -XX:-UseParNewGC"         JAVA_OPT="${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"
else
    JAVA_OPT="${JAVA_OPT} -XX:+UseG1GC -XX:G1HeapRegionSize=16m -XX:G1ReservePercent=25 -XX:InitiatingHeapO    ccupancyPercent=30 -XX:SoftRefLRUPolicyMSPerMB=0"
    JAVA_OPT="${JAVA_OPT} -Xlog:gc*:file=${GC_LOG_DIR}/rmq_srv_gc_%p_%t.log:time,tags:filecount=5,filesize=    30M"
fi 

定位if [[ "$JAVA_MAJOR_VERSION" -lt "9" ]] ; then这一行，在shell语句中方括号并不是两个[[]]，而是一个[]

参考文献

[1] https://www.jianshu.com/p/98880be8912b
[2] nicethemes.cn/news/txtlist_i44987v.html