Benedict Jin created ZOOKEEPER-2837:
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Summary: Add a special START_SERVER_JVMFLAGS option only for
`start` command to distinguish JVMFLAGS and SERVER_JVMFLAGS
Key: ZOOKEEPER-2837
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2837
Project: ZooKeeper
Issue Type: Bug
Components: server
Affects Versions: 3.5.3
Reporter: Benedict Jin
Assignee: Benedict Jin
Add a special START_SERVER_JVMFLAGS option only for `start` command to
distinguish JVMFLAGS and SERVER_JVMFLAGS. If we use the normal way to add JVM
options with `JVMFLAGS` in `conf/java.env`, then it will effect almost all
shell scripts under `bin` directory. Even if using `SERVER_JVMFLAGS` will
effect some commands like `zkServer.sh status`, include four-letters commands.
For example, if the JVMFLAGS is
```bash
export JVMFLAGS="-Xms3G -Xmx3G -Xmn1G -XX:+AlwaysPreTouch
-XX:CMSInitiatingOccupancyFraction=70 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC
-XX:+PrintGCDetails -XX:-PrintGCTimeStamps
-Xloggc:/home/zookeeper/logs/zookeeper_`date '+%Y%m%d%H%M%S'`.gc
-XX:-UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=64M"
```
then we will get too many GC log files due to using the `mntr` four-letters
commands in some monitor situation.
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