supervisor empty logfile

Question

I've been messing around supervisor logfile capabilities. The program writes to stdout:

ruby sample.rb
>>0.9668821900023237 [tps] 
>>61.91346356232367 [tps] 
>>Heartbeat....
>>58.84168122263758 [tps] 
>>Heartbeat....

When I run it from supervisor, I've got log files created, but stdout_logfile is always empty. When I mess something in sample.rb, so that I have any kind of exception, it is successfully written to stdout_logfile due to redirect_stderr.

Supervisor configuration file:

[program:sample]
priority=50
command=/usr/bin/ruby sample.rb
numprocs=1
directory=/home/myapp/myapp
autorestart=true
autostart=true
startsecs=10
stopwaitsecs=90
redirect_stderr=true
stdout_logfile=/var/log/sample.out.log
user=myapp

Why I see no output on stdout_logfile?

You can run whatever you want with http://supervisord.org/. It can be python process, ruby process, perl process, bash script. — maxk, Sep 17 '12 at 03:36

score 1 · Answer 1 · edited May 23 '17 at 11:43

1

This issue is solved by simply calling flush on stdout.

puts "hello world"
$stdout.flush

Related: Problem redirecting stdout in Ruby script

edited May 23 '17 at 11:43

Community

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answered Sep 23 '12 at 20:54

maxk

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supervisor empty logfile

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