Re: [Wrapper-user] Wrapper restarts JVM when no response from server

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Gaurav,
Restarts can be caused by a number of things.  Without seeing the logs, I
don't have any way of helping sorry.

Cheers,
Lei

On Fri, May 6, 2011 at 1:42 PM, Gaurav Pgoel <gau...@tc...> wrote:

>
> Hello,
>
> I am sorry to provide you with previous logs as it has rolled out. I only
> have jvm4 logs with me.
> Leif, is there any other workaround to prevent this restart?
>
> Regards,
> Gaurav Goel
> Tata Consultancy Services
> Mailto: gau...@tc...
> Website: http://www.tcs.com
> ____________________________________________
> Experience certainty.        IT Services
>                        Business Solutions
>                        Outsourcing
> ____________________________________________
>
>
>  From:
> Leif Mortenson <lei...@ta...>
> To:
> wra...@li...
> Date: 05/06/2011 09:54 AM Subject: Re: [Wrapper-user] Wrapper restarts JVM
> when no response from server
> ------------------------------
>
>
>
> Gaurav,
> The restart in the log you sent me was definitely caused by an external
> source restarting the service.  You can see how the Wrapper itself was
> stopped and then started again 3 minutes later.
>
> ---
> STATUS | wrapper  | 2011/05/03 21:52:18 | <-- Wrapper Stopped
> DEBUG  | wrapper  | 2011/05/03 21:55:16 | Allocating a console for the
> service.
> DEBUG  | wrapper  | 2011/05/03 21:55:16 | Found console window.
> DEBUG  | wrapper  | 2011/05/03 21:55:16 | Wrapper console window
> hidden successfully.
> STATUS | wrapper  | 2011/05/03 21:55:16 | --> Wrapper Started as Service
> ---
>
> Prior to the shutdown at 2011/05/03 21:52:18 however you could see that the
> Wrapper was running its 4th JVM.  This means that the JVM had been restarted
> 3 times for some other reason.   If you could send me the full log file that
> shows those restarts in a direct email I will take a look at what caused
> them.   Those may be because of a timeout but I am unable to say from what
> you sent me.
>
> Cheers,
> Leif
>
> On Fri, May 6, 2011 at 1:04 PM, Gaurav Pgoel <*gau...@tc...*<gau...@tc...>>
> wrote:
>
> Thank you for the replies.
> Leif, you mean the service was restarted and we can ignore the fact that
> the JVM was hung or not responding?
>
> There is one more observation that i want to share. We have seen this
> similar behavior on one more client machine. This raises a doubt as to
> whether both places did someone restart the service?
>
> Regards.
> Gaurav Goel
> Tata Consultancy Services
> Mailto: *gau...@tc...* <gau...@tc...>
> Website: *http://www.tcs.com* <http://www.tcs.com/>
>
> ____________________________________________
> Experience certainty.        IT Services
>                        Business Solutions
>                        Outsourcing
> ____________________________________________
>
>   From: Leif Mortenson <*lei...@ta...*<lei...@ta...>
> >  To: *wra...@li...*<wra...@li...>
> Date: 05/05/2011 08:14 PM  Subject: Re: [Wrapper-user] Wrapper restarts
> JVM when no response from server
>
>  ------------------------------
>
>
>
>
> Gaurav,
> Thank you for the detailed message.  It makes it easy to respond.
>
> In your case, the Wrapper is shutting down because the Windows Service
> Manager has sent in a stop command:
>
> DEBUG  | wrapperp | 2011/05/03 21:52:13 | read a packet PING : ping
> DEBUG  | wrapper  | 2011/05/03 21:52:16 |   SERVICE_CONTROL_STOP
>
> When the Wrapper stops, the Service Manager is starting it again
> almost immediately.
>
> STATUS | wrapper  | 2011/05/03 21:52:18 | <-- Wrapper Stopped
> DEBUG  | wrapper  | 2011/05/03 21:55:16 | Allocating a console for the
> service.
> DEBUG  | wrapper  | 2011/05/03 21:55:16 | Found console window.
> DEBUG  | wrapper  | 2011/05/03 21:55:16 | Wrapper console window
> hidden successfully.
> STATUS | wrapper  | 2011/05/03 21:55:16 | --> Wrapper Started as Service
>
> This makes me think that someone pressed the Service Restart button in
> the service control manager.  But I am only guessing as we do not have
> any way of telling what initiated such a restart.
>
> At the time that the Wrapper shuts down however, I do see that you are
> on the 4th Java invocation since the Wrapper was launched.  The log
> fragment that you sent does not include any of the 3 restarts that
> took place so I am unable to see what the circumstances were around
> those restarts.    Could you please locate one of them in your logs
> and then send me a few minutes before the restart through a minute or
> so after?
>
> I also see that you are using 3.5.4.  The 3.5.8 version that we just
> released contains some improvements which will prevent unneeded JVM
> restarts on heavily IO loaded systems.  I have not seen anything yet
> to show that that is the problem however.
>
> Cheers,
> Leif
>
> On Thu, May 5, 2011 at 7:48 PM, Gaurav Pgoel <*gau...@tc...*<gau...@tc...>>
> wrote:
> >
> > Hi,
> >
> > I am using Wrapper 3.5.4. I have written a java code and running it as
> java
> > wrapper service on Windows NT machine.
> > I have a code to uplaod files from client machine (on which service is
> > installed) to server.
> > Sometimes, it happens that the upload takes time say 5 - 10 minutes to
> > upload a file. In the meantime, there is no response from server to the
> > client.
> >
> > In this situation, I assume, that my wrapper service restarts JVM
> thinking
> > that the jvm is hung.
> >
> > Due to this, there is duplicate upload happening. To avoid this, i am
> > thinking of increasing wrapper ping interval to say 300 seconds. What do
> you
> > think guys?
> >
> > Below is the wrapper.conf file contents:
> <snip>
> >
> *******************************************************************************************
> >
> > Also written below is the system logs;
> >
> *******************************************************************************************
> <snip>
> >
> *******************************************************************************************
> >
> >
> > Guys what your views on this? Is this really because Wrapper thinks that
> the
> > JVM is hung? Or is it because of some other reason?
> >
> > Thanks in advance to all.
> >
> > Regards,
> > Gaurav Goel
> > Tata Consultancy Services
> > Mailto: *gau...@tc...* <gau...@tc...>
> > Website: *http://www.tcs.com* <http://www.tcs.com/>
>
>