Github user solarce commented on the pull request:
https://github.com/apache/storm/pull/281#issuecomment-57945091
@nathanmarz
It's not any existing environment variable, it's just a name I made up.
I do use nimbus.childops, etc for adding JMX related arguments because
their position in the process arguments doesn't matter. As to why I don't juse
use nimbus.childopts, etc, I'm copying my reasoning from what I wrote in
https://issues.apache.org/jira/browse/STORM-517.
>> Currently the way that _bin/storm_ starts the various storm processes
(nimbus, ui, supervisor) results in a process list entry like the following,
for each process:
>>```
>>ubuntu 21940 0.4 3.9 2294904 151384 ? Ssl Oct03 2:47 java
-server -Dstorm.options=
-Dstorm.home=/home/ubuntu/apache-storm-0.9.2-incubating
-Djava.library.path=/usr/local/lib -Dstorm.conf.file= -cp
/home/ubuntu/apache-storm-0.9.2-incubating/lib/asm-4.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/commons-logging-1.1.3.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/ring-devel-0.3.11.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/storm-core-0.9.2-incubating.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/log4j-over-slf4j-1.6.6.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/tools.cli-0.2.4.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/ring-servlet-0.3.11.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/commons-codec-1.6.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/logback-classic-1.0.6.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/clj-time-0.4.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/httpclient-4.3.3.jar:/home/ubuntu/ap
ache-storm-0.9.2-incubating/lib/slf4j-api-1.6.5.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/httpcore-4.3.2.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/carbonite-1.4.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/clout-1.0.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/jetty-6.1.26.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/clojure-1.5.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/commons-io-2.4.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/commons-exec-1.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/jgrapht-core-0.9.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/curator-client-2.4.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/tools.macro-0.1.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/zookeeper-3.4.5.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/jline-2.11.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/minlog-1.2.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/tools.logging-0.2.3.jar:/home/ubuntu/
apache-storm-0.9.2-incubating/lib/reflectasm-1.07-shaded.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/guava-13.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/ring-core-1.1.5.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/logback-core-1.0.6.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/netty-3.6.3.Final.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/ring-jetty-adapter-0.3.11.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/core.incubator-0.1.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/commons-lang-2.5.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/netty-3.2.2.Final.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/curator-framework-2.4.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/disruptor-2.10.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/servlet-api-2.5-20081211.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/clj-stacktrace-0.2.4.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/chill-java-0.3.5.jar:/home/ubuntu/apache-sto
rm-0.9.2-incubating/lib/compojure-1.1.3.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/kryo-2.21.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/jetty-util-6.1.26.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/servlet-api-2.5.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/json-simple-1.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/commons-fileupload-1.2.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/snakeyaml-1.11.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/math.numeric-tower-0.0.1.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/joda-time-2.0.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/hiccup-0.3.6.jar:/home/ubuntu/apache-storm-0.9.2-incubating/lib/objenesis-1.2.jar:/home/ubuntu/apache-storm-0.9.2-incubating/conf
-Xmx1024m -Dlogfile.name=nimbus.log
-Dlogback.configurationFile=/home/ubuntu/apache-storm-0.9.2-incubating/logback/cluster.xml
backtype.storm.daemon.nimbus
>>```
>> This means that it can be difficult to differentiate between the
processes in the process list and monitoring tools that use SNMP to get the
process list (such as Zenoss) can't differentiate because the process list
arguments gets truncated way before the list of .jars in the text stops being
the same.
>> Ideally we'd be able to set *-Dservice=foo* in _bin/storm_ via an
environment variable, so it's easy to set with things like upstart, runit, etc
I realize that the SNMP truncation of the process arguments is a factor of
my environment, but it's not an uncommon way to do process monitoring, and I
felt that adding this environment variable that's optional was the least
intrusive way to add it.
If there is another way for me to get -Dservice= at the beginning of the
process arguments with the existing _bin/storm_, I'd love to hear about it
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