Re: Output from sudo kill -QUIT pid

Hi Brendan,

Apple, in its never ending quest to "think different" keeps these in a  
very special place - /dev/null.  You need to use the DevNullViewer  
application to access these.  :-P

  OK, enough with the jokes.  Here is how to fix this:
-----------------

From: Wojtek

Theoretically you can do kill -QUIT <jvmpid> to see the list of JVM  
threads, and (since 1.4) deadlocks:
http://developer.java.sun.com/developer/technicalArticles/Programming/ 
Stacktrace/

===  Go to appropriate dir
# cd
/opt/Apple52/Library/WebObjects/JavaApplications/wotaskd.woa/Contents/ 
Resources/

=== Original file (Apple)
# cat SpawnOfWotaskd.sh.bak
#!/bin/sh

$@ 1>/dev/null 2>&1 &

=== Modified by me  (not the best choice of files)
# cat SpawnOfWotaskd.sh
#!/bin/sh

$@ 1>>/var/log/webobjects.log 2>>/var/log/webobjects.err &

=== Now signal
# kill -QUIT 19466

=== Et voilla, trace is back
# tail /var/log/webobjects.log
         at Application.main(Application.java:32)
         at java.lang.reflect.Method.invoke(Native Method)
         at  
com.webobjects._bootstrap.WOBootstrap.main(WOBootstrap.java:71)

"VM Thread" prio=1 tid=0x808ae88 nid=0x4c47 runnable

"VM Periodic Task Thread" prio=1 tid=0x80958f8 nid=0x4c4a waiting on  
monitor
"Suspend Checker Thread" prio=1 tid=0x8096290 nid=0x4c4b runnable
-----------------------

Or, of course, just turn to page 92, verse 1 in Practical WebObjects.   
;-)

Chuck


On Nov 19, 2004, at 10:29 AM, Brendan Duddridge wrote:

> Hi,
>
> Does anyone know where the output of doing 'sudo kill -QUIT pid' goes?  
> I
> have an application that is not responding anymore and I'd like to see  
> the
> stack trace of where it's waiting. The app was started up with  
> Monitor. I
> know that if I start it from the command line and do a control-\, then  
> I
> will see the stack trace. I want an equivalent way of getting that
> information from a Monitor started application.
>
> WO 5.2.3, OS X Server 10.3.5.
>
> Thanks,
>
> ___________________________
>
> Brendan Duddridge
>
> ClickSpace Interactive Inc.
> Suite L100
> 239 - 10th Ave SE
> Calgary, AB  T2G 0V9
> Canada
> (403) 277-5591
> http://www.clickspace.com/
>
>
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-- 
Practical WebObjects - a book for intermediate WebObjects developers  
who want to increase their overall knowledge of WebObjects, or those  
who are trying to solve specific application development problems.
http://www.global-village.net/products/practical_webobjects