Sorry for late reply. We have fixed the issue. Kubernetes ingress file was
causing multiple requests to be sent over and over again. Proxy timeout
along with read and send timeouts were not present in that file. We have
added them and now the process is working fine allowing it to complete with
only one single thread.

Thank you all for your support.

Regards,
Ripu daman

On Tue 9 Jun, 2020, 10:20 PM Christopher Schultz, <
ch...@christopherschultz.net> wrote:

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> Ripu,
>
> On 6/9/20 08:03, Ripu Daman wrote:
> > Hello everyone,
> >
> > I work in an IT firm as a software engineer. I don't know whether
> > it's a right platform to ask questions based on personal projects
> > but i believe i will get some help from here.
> >
> > We are facing an issue regarding multiple threads being created for
> > a servlet execution running in tomcat 9.0.0
> >
> > Servlet's job is to publish customer leads to salesforce via soap
> > protocol. The logic has been designed in such a way that in a
> > single thread it can publish multiple leads to salesforce one by
> > one. However we recently migrated our java application to
> > kubernetes adopting containerized approach. Post this we are facing
> > an issue in which, when the process starts publishing leads to
> > salesforce one by one, after a few uploads a new thread gets
> > created and it starts the whole process from beginning and then
> > after a few seconds another thread kicks off repeating the whole
> > process. It keeps going on until session timeout exceeds and we get
> > a 504 error. But the upload process keeps going on in the
> > background and stops after 2-3 threads.
>
> Where is your queue stored?
>
> > Before moving to kubernetes, the process was working fine. In order
> > to serve multiple requests at the same time, servlet is not
> > designed to be thread safe.
>
> It's NOT designed to be thread-safe? I hope you meant it IS designed
> to be thread-safe.
>
> > But now we are facing this issue and unable to identify the root
> > cause.
> >
> > Here's a sample of threads from the logs : [http-nio-8080-exec-9]
> > INFO [http-nio-8080-exec-9] INFO [http-nio-8080-exec-9] INFO
> > [http-nio-8080-exec-7] INFO [http-nio-8080-exec-7] INFO
> > [http-nio-8080-exec-9] INFO [http-nio-8080-exec-9] INFO
> >
> > [http-nio-8080-exec-7] INFO [http-nio-8080-exec-7] INFO
> > [http-nio-8080-exec-7] INFO [http-nio-8080-exec-3] INFO
> > [http-nio-8080-exec-7] INFO [http-nio-8080-exec-3] INFO
>
> These are request-processing threads, so something is making HTTP
> requests to Tomcat to do that work.
>
> - -chris
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