application goes down after restart the tomcat server 8.29 or restart the OS

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application goes down after restart the tomcat server 8.29 or restart the OS

Loai Abdallatif
Dear Colleagues
I have HR application deployed on two tomcat workers , but when I restart
the tomcat instance or restart the OS , then the application failed to
start and just works if I re-deploy the application again , please advise
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Re: application goes down after restart the tomcat server 8.29 or restart the OS

Suvendu Sekhar Mondal
Loai,

On Thu, Jun 7, 2018, 2:03 AM Loai Abdallatif <[hidden email]>
wrote:

> Dear Colleagues
> I have HR application deployed on two tomcat workers , but when I restart
> the tomcat instance or restart the OS , then the application failed to
> start and just works if I re-deploy the application again , please advise
>

What is the error you are getting? Please provide some details, otherwise
it will be very hard to help you out here.

>
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Re: application goes down after restart the tomcat server 8.29 or restart the OS

Christopher Schultz-2
In reply to this post by Loai Abdallatif
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Loai,

On 6/6/18 4:32 PM, Loai Abdallatif wrote:
> Dear Colleagues I have HR application deployed on two tomcat
> workers , but when I restart the tomcat instance or restart the OS
> , then the application failed to start and just works if I
> re-deploy the application again , please advise

My guess is that your application relies on load-order of applications
being initialized, and when one of the dependencies isn't running, the
application cannot start.

If that's the case, you need to make sure that your applications can
tolerate unavailability of any dependencies during startup.

- -chris
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Re: application goes down after restart the tomcat server 8.29 or restart the OS

Loai Abdallatif
thanks Chris, yes the apps are dependent on each others

On Thu, Jun 7, 2018 at 5:12 PM, Christopher Schultz <
[hidden email]> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> Loai,
>
> On 6/6/18 4:32 PM, Loai Abdallatif wrote:
> > Dear Colleagues I have HR application deployed on two tomcat
> > workers , but when I restart the tomcat instance or restart the OS
> > , then the application failed to start and just works if I
> > re-deploy the application again , please advise
>
> My guess is that your application relies on load-order of applications
> being initialized, and when one of the dependencies isn't running, the
> application cannot start.
>
> If that's the case, you need to make sure that your applications can
> tolerate unavailability of any dependencies during startup.
>
> - -chris
> -----BEGIN PGP SIGNATURE-----
> Comment: GPGTools - http://gpgtools.org
> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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Re: application goes down after restart the tomcat server 8.29 or restart the OS

Christopher Schultz-2
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Loai,

On 6/7/18 5:26 PM, Loai Abdallatif wrote:
> thanks Chris, yes the apps are dependent on each others

Sounds like you need to loosen that requirement.

Try techniques such as "lazy initialization", or even
automated-retries if something isn't up the first time to try to
connect to it.

Good luck,
- -chris

> On Thu, Jun 7, 2018 at 5:12 PM, Christopher Schultz <
> [hidden email]> wrote:
>
> Loai,
>
> On 6/6/18 4:32 PM, Loai Abdallatif wrote:
>>>> Dear Colleagues I have HR application deployed on two tomcat
>>>> workers , but when I restart the tomcat instance or restart
>>>> the OS , then the application failed to start and just works
>>>> if I re-deploy the application again , please advise
>
> My guess is that your application relies on load-order of
> applications being initialized, and when one of the dependencies
> isn't running, the application cannot start.
>
> If that's the case, you need to make sure that your applications
> can tolerate unavailability of any dependencies during startup.
>
> -chris
>>
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>>
>>
To unsubscribe, e-mail: [hidden email]
>> For additional commands, e-mail: [hidden email]
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Re: application goes down after restart the tomcat server 8.29 or restart the OS

Loai Abdallatif
Thanks Chris, you input  appreciated

On Fri, Jun 8, 2018 at 10:31 PM, Christopher Schultz <
[hidden email]> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> Loai,
>
> On 6/7/18 5:26 PM, Loai Abdallatif wrote:
> > thanks Chris, yes the apps are dependent on each others
>
> Sounds like you need to loosen that requirement.
>
> Try techniques such as "lazy initialization", or even
> automated-retries if something isn't up the first time to try to
> connect to it.
>
> Good luck,
> - -chris
>
> > On Thu, Jun 7, 2018 at 5:12 PM, Christopher Schultz <
> > [hidden email]> wrote:
> >
> > Loai,
> >
> > On 6/6/18 4:32 PM, Loai Abdallatif wrote:
> >>>> Dear Colleagues I have HR application deployed on two tomcat
> >>>> workers , but when I restart the tomcat instance or restart
> >>>> the OS , then the application failed to start and just works
> >>>> if I re-deploy the application again , please advise
> >
> > My guess is that your application relies on load-order of
> > applications being initialized, and when one of the dependencies
> > isn't running, the application cannot start.
> >
> > If that's the case, you need to make sure that your applications
> > can tolerate unavailability of any dependencies during startup.
> >
> > -chris
> >>
> >> ---------------------------------------------------------------------
> >>
> >>
> To unsubscribe, e-mail: [hidden email]
> >> For additional commands, e-mail: [hidden email]
> >>
> >>
> >
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> Comment: GPGTools - http://gpgtools.org
> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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