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A comment on You don't need to daemonize. Parent comment

Re:You don't need to daemonize by hactually on Sunday June 28, 2015 @07:16PM (#9795523)
What's wrong with doing something like the following:

...

[Service]

Type=forking

EnvironmentFile=-/usr/local/myJavaConfig

ExecStart=/bin/sh -c '${JAVA_HOME} ${JAVA_OPTS}'

Or if you're after passing things in, use the other technique that lets you use systemctl myservice@your_sub.service

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Re:You don't need to daemonize by JdeBP on Sunday June 28, 2015 @10:32PM (#9796124)
Two things are wrong, neither of which, however, make daemonize appropriate. First, and trivially, there's a missing /bin/java (-: Second, that's a potential readiness protocol and a main PID mismatch. See http://unix.stackexchange.com/a/200365/5132 for details. And then http://askubuntu.com/a/624871/43344 . Remembering to exec is another lesson to bring along from the daemontools world.
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