No operations allowed after statement closed

Question

I am getting the Exception with the signature No operations allowed after statement closed. inside my Java code where I am trying to insert values into the data

Answer 1

statement is static, so it's shared among instances (and threads). One thread is probably trying to use that object after another one has closed it.

It is generally a bad idea to share database connections and statements between threads since JDBC does not require connections to be thread-safe.