Re: [Wrapper-user] Debugging with wrapper

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

Chandra, David,
    I made some changes for the 3.2.1 release.

    The wrapper will now enter a "DebugJVM" mode if the 
wrapper.java.command ends
in "jdb" or "jdb.exe", or the "-Xdebug" argument is passed to the JVM.

    When operating in the "DebugJVM" mode, a warning will be displayed 
on JVM launch
if any of the timeouts are not set to 0.  The warning warns that the 
ability to detect and
restart a frozen JVM will be disabled.

    Then if a timeout does occur, it will be ignored.  But the first 
such timeout will cause
another warning to be displayed to the user stating which timeout was 
encountered and
saying that it may be caused by a debugger having suspended the JVM.

    Does this make everyone happy?

Cheers,
Leif

   

Chandra Patni wrote:
> I see how your proposal is more compliant and semantically correct 
> than mine which is in the spirit of 'benevolent dictatorship'. Either 
> way, it would be nice to have nice debugging experience.
>
>
>
> da...@sm... wrote:
>> I agree and disagree. I don't think the wrapper should set its ping 
>> to  0 if debug is set, but I do think it should not restart when 
>> debug is  set. Maybe record in in the log file that it timed out, but 
>> due to  debug existing, the application won't be restarted, unless 
>> there is  some super-sexy way of finding out from the debugged 
>> application that  the wrapper thread (and others depending upon the 
>> debugger that  connects to it) has been debug paused.
>>
>> My thoughts at least!
>>
>> Cheers again Leif!
>>
>> Quoting Chandra Patni <cp...@ig...>:
>>
>>> I think wrapper should set ping timeout to zero if -Xdebug and
>>> -Xrunjdwp .... option is set  for JVMDI supporting VMs. And print out
>>> this as warning. It should also do the same when -agentlib:jdwp...
>>> option is set for newer JVMTI supporting VMs. Otherwise, it will always
>>> result in surprised user.
>>>
>>>
>>>
>>> Leif Mortenson wrote:
>>>
>>>> Chandra,
>>>> I'm not sure of any way to let the Wrapper know that the JVM is   
>>>> paused due to
>>>> debug mode.  You would not want to disable the ping timeout simply 
>>>> because
>>>> debug was enabled.    I should add a note about this or maybe 
>>>> make   the Wrapper
>>>> provide some additional info if the command line contains -Xdebug.  
>>>> Setting
>>>> wrapper.ping.timeout to 0 should solve the problem for you however.
>>>>
>>>> Cheers,
>>>> Leif
>>>>
>>>> Chandra Patni wrote:
>>>>
>>>>> I started my JVM with
>>>>> -Xdebug -Xnoagent -Djava.compiler=NONE   
>>>>> -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
>>>>>
>>>>> and attached IDE debugger. Blocked a JSP thread on a breakpoint.   
>>>>> The wrapper restarts/shuts down (depending on   
>>>>> wrapper.disable_restarts=TRUE) the VM.
>>>>>
>>>>>
>>>>> ERROR  | wrapper  | 2006/05/09 16:35:02 | JVM appears hung: 
>>>>> Timed   out waiting for signal from JVM.
>>>>> ERROR  | wrapper  | 2006/05/09 16:35:02 | JVM did not exit on   
>>>>> request, terminated
>>>>> STATUS | wrapper  | 2006/05/09 16:35:03 | JVM Restarts disabled.   
>>>>> Shutting down.
>>>>> STATUS | wrapper  | 2006/05/09 16:35:03 | <-- Wrapper Stopped
>>>>>
>>>>> I can set the wrapper.ping.timeout to zero to avoid this.   
>>>>> Shouldn't wrapper should detect debug mode?
>>>>>
>>>>>
>>>>>
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>>>
>>> -------------------------------------------------------
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>>> Get stuff done quickly with pre-integrated technology to make your 
>>> job easier
>>> Download IBM WebSphere Application Server v.1.0.1 based on Apache 
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>>
>>
>>
>>
>>
>> -------------------------------------------------------
>> Using Tomcat but need to do more? Need to support web services, 
>> security?
>> Get stuff done quickly with pre-integrated technology to make your 
>> job easier
>> Download IBM WebSphere Application Server v.1.0.1 based on Apache 
>> Geronimo
>> http://sel.as-us.falkag.net/sel?cmd=k&kid0709&bid&3057&dat1642
>> _______________________________________________
>> Wrapper-user mailing list
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>> https://lists.sourceforge.net/lists/listinfo/wrapper-user
>
>
> -------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job 
> easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache 
> Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
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>