Re: [Wrapper-user] Debugging service started by wrapper, general hints?

[Leif M. <le...@ta...>]

Hubert,
What version of the wrapper are you using?  Starting with 3.2.1, the Wrapper
will automatically disable timeouts if it is able to detect from the 
java command
line that a debugger is being use.

 From the 3.2.1 release notes:
* Add support for debuggers.  The Wrapper will now show a warning on startup
  and then again the first time a timeout occurs.  But all timeouts will be
  ignored.  This is to avoid problems with the Wrapper restarting a 
suspended
  JVM in the middle of a debugging session.  The wrapper enters this mode if
  the wrapper.java.command ends with the string "jdb" or "jdb.exe", or the
  "-Xdebug" parameter is passed to the JVM.

I actually never use the debugger personally, so I am not a good test 
case for
this usage.   Are you encountering problems?  I may need to make additional
changes to make this work smoothly for you.

In general when using a debugger when paused, the JVM process will appear
to be frozen from the perspective of the Wrapper.  To keep it from 
killing that
"frozen" JVM, it is necessary to extend or disable the following 
timeouts.  If
you will only be pausing the JVM while its application is up and 
running, then
the ping and cpu timeouts will suffice.

http://wrapper.tanukisoftware.org/doc/english/prop-startup-timeout.html
http://wrapper.tanukisoftware.org/doc/english/prop-ping-timeout.html
http://wrapper.tanukisoftware.org/doc/english/prop-cpu-timeout.html
http://wrapper.tanukisoftware.org/doc/english/prop-shutdown-timeout.html
http://wrapper.tanukisoftware.org/doc/english/prop-jvm-exit-timeout.html

Be aware that changing these timeouts for a live system will severely 
degrade
and or disable the Wrapper's ability to respond to a misbehaving JVM.

Cheers,
Leif

Hubert Felber wrote:
> Hello,
>
> Has anybody some general hints about debugging?  I would like to
> connect the debugger to a service started by wrapper. 
> What should one do to prevent the wrapper from restarting the service
> if being debugged. 
> Should one disable the keepalive feature? Are there any more issues or
> pitfalls?
>
> Thank you
> hub
>
>
>
>
>
>
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