php-java-bridge-users

[Php-java-bridge-users] Constant 50%+ CPU usage?

[<php...@li...>]

I've noticed some strange performance issues on my development machine
while using the JavaBridge... specs:

Windows XP Professional
Apache 2.0.55
PHP 5.1.2
PHP-Java Bridge 3.0.7a
Java JDK 1.5.0_01

When I start Apache up fresh, the javaw process that's spawned stays at
~0% CPU usage, spiking momentarily whenever my PHP code does something
with Java.  After some time passes, with zero activity on the server,
javaw's CPU usage holds steady at a consistent 50%+.  I haven't the
foggiest idea where to begin looking for answers, so any help is
appreciated.  (I'm happy to provide additional detail if needed!)

Best,
Jonathan


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Jonathan Abbett
Children's Hospital Informatics Program
1 Autumn Street, Fifth Floor
Boston, MA 02215
617-355-8334
jon...@ch...
http://www.chip.org

Re: [Php-java-bridge-users] Constant 50%+ CPU usage?

[<php...@li...>]

Hi Jonathan,

> with Java.  After some time passes, with zero
> activity on the server,
> javaw's CPU usage holds steady at a consistent 50%+.

do you run javaw as a sub process of apache?

If so, can you please change the php.ini entry

java.java=javaw

to 

java.java=java

and then open the services dialog and allow the apache
service to open a console window. The procedure is
described here:

http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_18120

When you restart the apache service, a console window
appears. When the CPU usage jumps to 50% please type
Ctrl+Break simultaneously. It will create the thread
dump in a file called {server-name}-out.log or
{server-name}-err.log file, depending on the version
of JDK/JRE you are using.

The thread dump will show the thread name which causes
the trouble. My guess is that the thread is some Java
manager thread which tries to respond to some
unexpected events. -- Apache sometime has the habit to
send out a signal to all of its children. 

If that's the case starting Java outside of the Apache
domain should solve the problem.

Anyway, when you have the thread dump please open a
ticket (please use
http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233)
and attach the dump to this ticket.

Thank you very much for reporting this problem!


Regards,
Jost Boekemeier




		
___________________________________________________________ 
Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de