[
https://issues.apache.org/jira/browse/ZOOKEEPER-2837?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Benedict Jin updated ZOOKEEPER-2837:
------------------------------------
Description:
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
command regularly in some monitor situation.
```bash
$ ls ~/logs
zookeeper_20170704175942.gc
zookeeper_20170704180101.gc
zookeeper_20170704180201.gc
zookeeper_20170704180301.gc
zookeeper_20170704180401.gc
...
```
was:
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.
> 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
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> 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
> command regularly in some monitor situation.
> ```bash
> $ ls ~/logs
> zookeeper_20170704175942.gc
> zookeeper_20170704180101.gc
> zookeeper_20170704180201.gc
> zookeeper_20170704180301.gc
> zookeeper_20170704180401.gc
> ...
> ```
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