Using Pax-Runner as a Windows service results in 100% CPU
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Key: PAXRUNNER-155
URL: http://issues.ops4j.org/jira/browse/PAXRUNNER-155
Project: Pax Runner
Issue Type: Bug
Affects Versions: 0.12.0
Reporter: Stuart McCulloch
Assignee: Stuart McCulloch
Fix For: 0.13.0
As reported by Craig Walls on the OPS4J mailing list:
I'm trying to run Pax Runner (v0.12.0)-launched application as a Windows
service. I'm using JSL (http://jslwin.sourceforge.net/) to install and
run it as a service. It works, but when I start the service, the
performance tab in the task manager says that it's using 100% of the CPU!
I've tried narrowing the problem down and I've finally reached a point
where I'm doing a VERY minimal installation of Pax Runner as a service
(my app isn't even involved anymore...nor are its dependency bundles).
Here's what the jsl.ini looks like:
[defines]
PATH = c:\myapp
JAVA = %JAVA_HOME%
PP = %PATH%
P1 = %P2%
P2 = %PP%
MYAPP_HOME = %PATH%
[service]
appname = Semantra
servicename = MyApp
displayname = MyApp
servicedescription = MyApp
stringbuffer = 16000
starttype=auto
loadordergroup=someorder
useconsolehandler=false
stopclass=java/lang/System
stopmethod=exit
stopsignature=(I)V
premainmethod=run
premainsignature=()I
premain.modules=threaddump
premain.threaddump.class=com.roeschter.jsl.ThreadDumpListener
premain.threaddump.method=start
premain.threaddump.wait=3000
premain.threaddump.critical=no
premain.threaddump.interface=127.0.0.1
[java]
cmdline = -jar %MYAPP_HOME%/bin/pax/pax-runner-0.12.0.jar --platform=eq
The only thing non-trivial about running Pax Runner this way is that I'm
using Equinox instead of the default Felix (I get the same results with
Felix, btw).
Again, nothing special...just a bare-bones Pax Runner. No bundles other
than the framework bundles are involved. When I start the service, the
CPU jumps to 100%. Actually, while it's resolving the framework bundles
from Maven, it stays relatively low (at around 40% or less)...but once
the framework starts, it plateaus at 100%.
Note that I can run Pax Runner (with or without my app) as a non-service
and the CPU stabilizes after a brief startup spike. I can also run
Equinox (java -jar equinox.jar) as a service and the CPU usage remains
low. So, the culprit seems to be Pax Runner.
I don't expect that anyone listening has tried doing this before, but I
have to ask: What could Pax Runner be doing after the framework starts
that would cause it to consume all of the CPU when running as a Window
service? Once the framework is started, what is there for Pax Runner to
do? Why so busy?
And...anybody have any ideas on how I could run this as a service and
*not* use up all of the CPU?
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