I assume a servlet request is kicking off this process? If this is correct then are you 100% sure that something is not calling the servlet more than once? Perhaps a retry after a timeout or something?
Turn your access log on and look at what requests are coming in to the server Paul On Tue, Jun 9, 2020 at 2:04 PM Ripu Daman <ripudaman...@gmail.com> 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. > > 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. > > 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 > > The configurations for tomcat remains same as default. Session timeout is > set as 30 min (default). > > For more info please let me know. > > Hope will get some help from here. > > Thanks! > > regards, > Ripu daman >
