Duplication of method execution in two different threads.

[ElVargas95]

We are using Play Framework 2.8.20 for Java, and we are facing an issue with a method that we are consuming through an Ajax client. The problem we are encountering is that when executing the transaction, as it is a heavy transaction, the method reaches a point where it spawns another thread and starts its execution again. This leads to the method's execution being duplicated twice, which is a serious issue in production. What can we do to prevent the server from making these double attempts without notifying it?

[mkurz]

Sorry, I do not fully understand. So the method is an action method and you do send data TO an ajax client?
And that action method does on purpose start another thread? So you implemented the logic to start another thread?
What do you mean ..."without notifying it?"